Second Test P.M

What is the measure of angle between plane of coil and magnetic field at which torque is maximum value?

Which one of following is working one the basis of mutual induction?

How ammeter is connected in circuit?

Which of the following modulation is desired for long distance communication?

What will be the maximum strength of a signal at output of resistance 4 kilo ohms, if a input its current is 2 mA?

The electron go on accumulating at the one end leaving the other with a positive till the force of _________balances the force due to the motion of conductor.

A circuit in which there is a current of 5 A is changed so that the current falls to zero on-tenth of a second.If an average emf of 200 V is induced, what is the self inductance of the circuit?

A coil of 600 turns is threaded by a flux of 15×10^-15 webers. If this flux is reduced to 5×10^-15 webers in 0.03 seconds. What is the average induced emf?

There is current of 25 A in a long straight wire. What is the flux density at a point 3 cm from the wire?

The length of a side of unit cell is:

It is to be noted that only inside the ___________, there is a positive charge on N side and a negative charge on P side.

Barrier height in the crystal diode decreases due weakening of electric field of barrier in:

Of the following, which one is independent of intensity of light in photo diode?

A PNP transistor is one which has:

In order to achieve faithful ____________, the input circuit should always remain____________.

A current carrying straight conductor is placed vertically in a magnetic field directed from north to south. If direction of current is downward, then in which direction it experiences force?

Name the electrical measuring instrument which has internal potential source.

Wheatstone bridge can enable one to measure resistance if:

What is the resistance of shunt required to device an ammeter of range 10 A? (Given: galvanometer has resistance 50 ohm and full scale deflection at 10 mA)

If resistance increases from 1 to 4, then the range of ammeter is maximum at:

A straight conductor of length 2 m is pulled in a magnetic field of strength 1.5 T at right angles to the field. If it travels 2 m in 0.25 seconds then what is maximum average emf is produced across its terminals?

A 300 V voltmeter has a total resistance of 20,000 ohms. What additional series resistance must be connected to it to its range  to 500 volts?

A 100 turn coil in a generator has an area of 500 cm^2 rotates in a magnetic field with 0.06 Tesla. How fast must the coil rotated in order to generate a maximum emf of 150 V?

Which one of the following power loss can be overcome by lamination?

An electron and a proton moving with same momenta entering into a magnetic field at right angles. Which will experience greater force?

An electron and a proton moving with same momenta entering into a magnetic field at right angles. Which will move in larger circle?

All of following may experience force in magnetic field except:

Direction of magnetic force on moving charges inside the magnetic field is:

Which one of the following is replaced in AC generator to modify it into DC Generator?

If magnetic flux through coil of generator is changing from BAN – 0 – (-BAN), then emf produced is:

Induced emf always opposes the change which give rise to it, known as

Width of _______ band defines the different classes of solid materials.

Which one of the following must be connected in reversed biased in circuit?

A modulating signal of 2 cm amplitude is mixed with carrier signal of amplitude 3 cm. What is the percentage of modulation?

Range of frequency modulation is:

In an amplitude modulation, information is actually carried by:

Electric field and magnetic field in an electromagnetic wave are:

Magnetic field of ___________ is similar to as that of bar magnet.

Input voltage and current of a commercial transformer are 140 V and 10 A respectively. If efficiency of transformer is 90% and output current is 6 A then what is the output voltage?

Length of Solenoid becomes/remains __________ when current starts to flow through it.

Read the passage carefully and answer the questions given below

The secret of writing good English is not just memorizing the rules of grammar; actually, it lies in developing the habit of unambiguous thinking and precise expression. Mathew Arnold, an English poet and prose writer, commented, “Have something to say and say it as clearly as possible.” Many of the students in Pakistan have no particular style because they have nothing to say. If any unclear idea they have, they express it vaguely. Perspicuity or lucidity is the prime requisite of an impressive writing style. In order to attain lucidity, we should avoid dangling of ideas, vagueness of expression, redundancy of arguments, and use of bombastic words.

What is the main idea of the passage?

Read the passage carefully and answer the questions given below

The secret of writing good English is not just memorizing the rules of grammar; actually, it lies in developing the habit of unambiguous thinking and precise expression. Mathew Arnold, an English poet and prose writer, commented, “Have something to say and say it as clearly as possible.” Many of the students in Pakistan have no particular style because they have nothing to say. If any unclear idea they have, they express it vaguely. Perspicuity or lucidity is the prime requisite of an impressive writing style. In order to attain lucidity, we should avoid dangling of ideas, vagueness of expression, redundancy of arguments, and use of bombastic words.

According to the passage who can write well.

Choose the word most similar in meaning to the capitalized one. 

FEEBLE

Choose the word most similar in meaning to the capitalized one

DILIGENT

Choose the word most similar in meaning to the capitalized one

CREED

Choose the lettered word or phrase that is most nearly opposite

CONTEMPTIBLE 

Choose the lettered word or phrase that is most nearly opposite

INFURIATE

Choose the lettered word or phrase that is most nearly opposite

CONCEAL

Read the passage carefully and answer the questions given below

I should say to the reawakened nations of Asia. Your independence will not be very difficult to preserve, especially in view of the division of the rest of the world into two hostile camps. But what will perhaps be more difficult will be refrain from copying the mistakes of the west .The west throughout the last five centuries has displayed extraordinary energy – energy which has taken many forms, some good, and some bad. It has explored the world from Pole to Pole. It has learnt the secrets of atoms and stars. It has discovered how to produce such an abundance of necessaries and comforts as previous ages would have thought unimaginable .But all this, which might have ministered to human happiness, has been vitiated by one fatal fault; the love of power over other human beings. Africans and Asians alike have been tortured in the oppressed by energetic ingenuity of western conquest. If the word is to be happy energy and ingenuity must no longer be expended in the exploitation of those who have less of these of qualities. Mankind must learn a degree of mutual respect which has never hitherto existed. Perhaps some at least of the nations of Asia will have learnt this lesson from their suffering at the hands of ingenious despots.

 What is the main idea of the passage?

Read the passage carefully and answer the questions given below

I should say to the reawakened nations of Asia. Your independence will not be very difficult to preserve, especially in view of the division of the rest of the world into two hostile camps. But what will perhaps be more difficult will be refrain from copying the mistakes of the west .The west throughout the last five centuries has displayed extraordinary energy – energy which has taken many forms, some good, and some bad. It has explored the world from Pole to Pole. It has learnt the secrets of atoms and stars. It has discovered how to produce such an abundance of necessaries and comforts as previous ages would have thought unimaginable .But all this, which might have ministered to human happiness, has been vitiated by one fatal fault; the love of power over other human beings. Africans and Asians alike have been tortured in the oppressed by energetic ingenuity of western conquest. If the word is to be happy energy and ingenuity must no longer be expended in the exploitation of those who have less of these of qualities. Mankind must learn a degree of mutual respect which has never hitherto existed. Perhaps some at least of the nations of Asia will have learnt this lesson from their suffering at the hands of ingenious despots.

Which one of the following is a correct statement?

Identify the words or phrases that needs to be changed for the sentences to be corrected.

They crawled among the wrecked pieces of the fortunate ship .No Error.

He will take any job which is available in this department. No Error

The UN deals to quarrels that might lead to war among  the nation.

The reawakening of the east is one of those enormous moments that can only be properly understood when viewed in a wide historical perspective.

As a university student, you should know______to use a library very well.

Do you know the name of the artist _________ painted this portrait?

________________ will have dinner together tomorrow night.

She was carrying a_____________ bag.

I’ve been here _______ 8:00 this morning so I’m going home now.

Switzerland lies __________ France, Italy, Austria and Germany.

Dehydrohalogenation of alkyl halides takes place in the presence of:

Which of the following compounds has no isomer 

Which pair of organic compound does not show functional group isomerism

Which of the following is not a nucleophile

Which of the following does not give nucleophilic substitution  reaction

Alkenes are prepared by the dehydration of alcohol in the presence of suitable dehydrating agent.The order of ease of dehydration will be

Which following derivative cannot be prepared directly from acetic acid.

Which one is not an elimination change

The class of compound that does not have Sp²_hybridized oxygen atom?

23 g of sodium will react with methanol to give

How many carbon are  sp3 hybridized in 1,5— hexadien -3-yne :

An alcohol is converted into an aldehyde with same number of carbon atoms in the presence of K2CrO4/H2SO4 . the alcohol is

Which compound is a tertiary alcohol?

The concentration of  molecules taking part in the  rate determining step is called

The hydrolysis of alkyl halides by heating with   aqueous alkali is a ——–reaction. 

The major product obtained by treating 2 – chlorobutane with alcoholic KOH is 

Elimination bimolecular reactions involve

For which mechanisms, the first step involved is the same 

Alkyl halides are considered to be very reactive compounds towards nucleophiles, because. They have

Which one of the following will have maximum dipole moment? 

Chloroethane reacts  with ‘x’ to form diethyl ether. What is ‘x’ 

What is the product of following reaction CH3I + C2 H5 I +2Na —–> 2NaI +   ? 

Arrange the following compounds in order of reactivity towards SN1 Displacement 

(A) 2 – Bromo – 2 – methyl butane (B) 1 – Bromo pentane  (C) 2 Bromopentane 
correct Answer is

A compound C5 H10 does not react with CI2 in the dark but yield single product C5 H9CI in bright sunlight. The original compound is 

The alkyl halide which hydrolysis by SN1 mechanism is  

Reactivity of alkyl halides with Mg is in the following order

Hydrolysis of ethyl Magenesium bromide produces

Identify ‘X’ product in the following reaction CH3 – CH2 – Mg – Br + O = C = O  —-> X + Mg (Br) OH 

Dehydrohalogenation of alkyl halide is carried in the presence of alcoholic 

What is the correct order of reactivity of alcohols in the following reaction?

What is the product when  is reduced using H₂ gas and a Ni catalyst?

CH₃ CH₂ OH can be converted into CH₃CHO by .

Which of the following compounds is aromatic alcohol?

    I                II                   III                IV

IUPAC name of the following compound is

Which of the following compounds will react with sodium hydroxide solution in water?

Identify the hydroquinone

Cannizzaro’s reaction is not given by

Which of the following compounds will give butanone on oxidation with alkaline KMnO₄ solution?

Ethanol is made undrinkable by addition of

Reaction which involves breakage of O-H bond in alcohols is

Molecules of alcohol have

With Tollens reagent, aldehydes suffer a reaction of

 The amount of water present in rectified spirit is:

An organic compound on reacting with conc. Sulphuric acid, gives an intermediate compound, which on further hydrolysis gives isopropanol. The organic compound is —— and process is called

Amongst the following, the compound that can be most readily sulphonated is

Aromatic compounds burn with sooty flame because:

The order of reactivity of alkyl halides should be

The oxidizing agent in the Tollen’s test for the presence of an aldehyde is

Reactivity of alkyl halides with magnesium is in the following order

The order of reactivity of alcohols when C — O bond breaks

The order of reactivity of alcohols when O — H bond breaks

What is missing on product side in the this reaction?

Which compound shows hydrogen bonding?

Which compound shows maximum hydrogen bonding with water?

Williamsons synthesis is used to prepare

Methyl alcohol is not used

The carbon atom of a carbonyl group is

Acetone reacts with HCN to form a cyanohydrin. It is an example of

Which of the following compounds will react with Tollen’s reagent.

Which of the following reagents will react with both aldehydes and ketones?

Genotype is.

Phenotype ratios 3:1 proves.

Allele is the

Test cross is

In Mirabilis plant the appearance of pink hybrid (Rr) b/w cross of red (RR) and white (rr) plant indicates. 

What is called pleiotropism?

In human height show lot of variation it is an example of:

The cross hetrozygous A blood group mother with B blood group father (hetrozygous) what will be expected blood group of first fital generation:

Which law of Mendel can be explained on chromosomes basis of inheritance?

Down’s syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an after mother and normal father.

A women with normal vision, but whose father was color blind marries a color blind man. Suppose that the fourth child of this couple was a boy. This boy:

In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t) If a plant with “RRTt” is crossed with a plant that is “ntt”.

Haemophilia is more commonly seen in human males than in human females because:

Which one of the following is an example of polygenic inheritance.

Phenotype of an organism is result of: 

Test cross involves:

In pea plant, yellow seeds are dominant to green. If a hetrozygous tall seeded plant is crossed with a green seeded plants. What ration of yellow and green seeded plants, would you expect in F₁

An individual with two identical members of a pair of factors is called: 

The character which appears physically in an animal is: 

A dwarf pea plant is treated with gibberellins which makes it tall. This plant is crossed with genetically pure tall plants phenotypic ratio in F2 generation shall be: 

If two alleles come together, only one is able to express itself. This is called:

A hetroxygons plant for tallness produce both tall and dwarf plants on self-pollination. This proves. 

If RBC’s of a person have antigen A and B his serum will have antibody: 

In a dihybrid cross, How many homozygous off springs will be produced:

Antibody less blood group is: 

The possible number of genotype for ABO system is:

Child has blood group O and his father is B type the genotype should be:

a. I^BI^B                              b. I^B                     c. I^AI^B                       d. ii

Erytheroblastosis foetalis is caused due to:

Female is hetrogametic amongst:

The character of organisms is said to be sex linked when its gene is carried on:

Sex linked characters are:

All children born to a couple will be color blind when:

When a color blind man marries a normal women and children are born, in the F₁ generation, the results will be:

If a boy’s father has haemophilia and his mother has one gene for

haemophilia. What is the chance that boy will inherit the disease?

Sickel called anaemia involves abnormality in the structure of:

When our gene pair hides the effect of other pair, thus phenomena is referred as

Genetic Engineering Microbes:

Genetically Engineered Plants and animals are called:

The enzymes which are commonly used in genetic engineering are

Which of following is popularly as “molecular scissors”:

The rector generally used for gene cloning is

A plasmid is a molecule of

Ti- plasmid is found in

Complementary DNA is made by using:

Restriction enzyme breaks:

Tumor producing plasmid transforms:

PCR technique is best for:

Gel electrophoresis is used for:

When bacteria are genetically engineered to produce human insulin the enzyme used to produce are:

1. Ligase
2. Restriction endonuclease     
3. Reverse transnptase

In which order are enzyme used?

A technique used to make numerous copies of a specific segment of DNA quickly and accurately:

Retro viruses have genetic material which is:

Plasmids are the suitable vectors for genetic doming is:

Which of the following pair is correctly matched:

Restrict enzymes are isolated chiefly from:

What is C-DNA?

Which of the following is best states the evolutionary theory?

The theory of inheritance of acquired character was proposed by _______ and based on:

Which theory of evolution stressed the role of environment in organ of species?

The evolution of long necked animals is explained by:

Which of the following is not postulate of lamarkims?

Lamark believes that new species cross by:

Darwin proposed the theory:

There is a more competition of survival between:

Early man was able to obtained plants and animals with desired characters by:

Which of following is an indication that two organisms belongs to same species?

The theory of natural selection fails to explains:

Same organism resemble with other organisms and thus escape from enemies this phenomena is known as:

Total number of genes in breeding population is refused as: