Second Test P.E

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?

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.

Which of the following statement is true about the Lenzes law

Neither of them ____ available to speak right now. a) are (b) has c) is (d) have 23.He has changed his voice lest it________ be recognized

A great number of people ________present at the lecture yesterday.

He has changed his voice lest it________ be recognized

if Jameel had done this job properly, he would not have been dismissed.

Here it means…. 

If f(x) = x, a = 1, b = 2. Then area of f(x) =?

a) 2           b) 3/2          c) 1/4         d) 1

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