Question # 1

Average value of A.C voltage during one cycle is

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1

Zero

Maximum

Variable

In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is

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8

4

6

7

A diatomic gas molecule has

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translational energy

rotaional energy

vibrational energy

all of them

If the value of C in a series RLC circuit is increased, the resonant frequency

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Is not affected

Increase

Remains the same

Decreases

If N is the total number of molecules and V is the volume of the container, then the expression for the pressure of gas is

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P=P/V<1/2mv²>

P=2N/V<1/2mv²>

P=2/3N/V<1/2mv²>

P=2/3N/V<mv²>

A capacitor acts as an infinite resistance for

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AC

DC

Both AC and DC

Neither AC nor DC

Amplitude in SHM is equivalent to_____ in circular motion:

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Diameter

Radius

Circumference

None of these

The year when A.H. compton was awarded Nobel Prize is:

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1923

1927

1931

1935

None of these

The speed of sound in a medium depends on

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The elastic property but not on the inertia property

The inertia property but not on the elastic property

The elastic property as well as the inertia property

Neither the elastic property nor the inertia property

A body of mass 5 kg is acted upon by a total change n momentum will be:

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10 NS

100 NS

140 NS

200 NS

On the power stroke, a spark fires the mixtures causing a rapid increase in pressure and temperature and the burning mixture expands

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adiabatically

isothermally

isochorically

isobarically

On Celsius scale boiling point of water is taken as

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0°C

100°C

180°C

None of these

Which of the modulus of elasticity is involved in compressing a rod to decrease its length?

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Young's modulus

Bulk modulus

Modulus of rigidity

None of the above

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The escape velocity of Uranus in Kms^-1

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22.4

23.07

24.09

24.5

The work done on the system by the environment is taken as

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Positive

Neutral

Negative

None of these

First law of thermodynamics tells us that heat energy can be converted into work which is

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Equivalent

Greater

Lower

None of these

An airplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m.When it is vertically above a point A on the ground a bomb is released from it.The bomb strikes the ground at point B.The distance AB is

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1200 m

0.33 km

3.33 km

33 km

Truth of kinetic energy theory is confirmed by:

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Diffusion of gases

Brownian motion

Both A and B

None of these

In electromagnetic waves electric and magnetic field ar

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Parallel

Antiparallel

Perpendicular

Sometimes parallel sometimes perpendicular

Change in entropy is positive when heat is

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Removed

Added

Remains as is it

None of these

To make a permanent magnet, a material should have

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hihg retentivety and small coercive force

low retentivety and high coercive force

low retentivety and small coercive force

high retentivety and high coercive force

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