Question # 1

Work is a:

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Scalar quantity

Vector quantity

Base quantity

None of these

When heat is removed from the system

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negative

positive

zero

any one of them

Which of the following material has smaller has life

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uranium

polonium

radium

radian

In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:

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Motion emf

Electrostatic emf

Induced emf

Both A and B

Both A and C

Addition of 2.189 kg, 11.8 kg and 5.32 kg gives the rounded off answer as:

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19.398

19.400

19.4

19.3

An irreversible heat flow from a hot to cold substances of a system, causes the disorder to

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decrease

remains the same

increase

any one of them

The circuit in which current and voltage are in phase, the power factor is

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zero

1

negative

0.83

Most OP-AMP operates with

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+ 6 V supply

+ 10 V supply

+ 12 V supply

+ 24 V supply

The application of Bernoulli's equation is

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Torricelli's theorem

Venture relation

Binomial theorem

Both a and b

In the formula P = N₀KT, N₀denotes:

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Number of molecules per unit per volume

Number of moles

Number of molecules

None of these

The energy is found from Einstein's mass energy relation is called

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binding energy of electron

binding energy of proton

binding energy of neutron

binding energy of nucleus

The minimum distance between a source and the screen for which a real image is possible with a convex lens is

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Its focal length

Twice the focal length

Four times the focal length

Square of the focal length

When small number of atoms from some other suitable element is added to the semi-conductor material, then this process is known as

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impurification

adding

doping

extrinsivity

Which of the following pair of quantities do not have the same units?

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Stress, Young's modulus

Strain, bulk modulus

Stress, bulk modulus

None of them

First law of thermodynamics is merely a statement of law of conversation of:

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Energy

Angular momentum

Change

Linear momentum

A fighter plane is chasing another plane,when it opens fire its speed

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Increases

Decreases

Remains constant

Its stops

In compound microscope magnification of objective is 2 and magnification of eyepiece is 4 magnification of compound microscope is

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2

6

8

None

The dimensions of ½at²are of

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length

Velocity

Acceleration

TIme

A diode characteristics curve is a graph plotted between;

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Current and time

Voltage and time

Voltage and current

Forward voltage and reverse current

SI unit of potential difference is volt it can be written as

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JC^-2

JC^-1

JC

J.A

A bullet of mass 10 g hits a target and penetrates 2 cm into it.If the average friction offered by the target is 100 N,then the velocity with which the bullet hits the target is

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10 ms^-1

1052 ms^-1

20 ms^-1

20√2 ms^-1

Two sources of light are said to be coherent when the waves produced by them have

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Equal wavelength

Equal amplitude

Equal wavelength and constant phase difference

Amplitude and wavelength are same

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