Question # 1

On heating, glass gradually softens into a paste like before it becomes a very viscous liquid at almost

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600°C

7600°C

800°C

900°C

Amorphous solids are also more like

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crystalline solids

gases

liquids

any one of them

Two samples A and B of a gas initially of the same temperature and pressure are compressed from a volume V to a volume V/2 such that A is compressed isothermally and B adiabatically. The final pressure

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A greater than than of B

A is equal to that of B

A is less than that of B

A is twice the pressure of B

The magnitude of the force producing an acceleration of 10 m/sec²in a body of mass 500 grams is:

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3 N

4 N

5 N

6 N

Resonance occurs when one of the natural frequencies of vibration of the forced or driven harmonic oscillator

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greater than the frequency of applied force

equal to the frequency of applied force

less than the frequency of applied force

all of them

Particles have the mass smallest of following is

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Electron

Proton

Neutron

Quark

A stationary sound wave has frequency 165 Hz (speed of sound in air = 330 m/s) then distance between two consecutive nodes is

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2 m

1 m

0.5 m

4 m

Specific resistance of a wire depends upon

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Length

Cross-section area

Mass

None

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10^-15is

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9 x 10⁵V

9 V

8 x 10⁶V

80 V

Bodies failing freely under gravity provide good example of motion under

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non-uniform acceleration

uniform acceleration

variable acceleration

increasing acceleration

The wave form of S.H.M will be

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square wave

sine wave

rectified wave

saw-tooth wave

magnetic field is a:

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Vector quantity

Scalar quantity

Scalar as well as scalar quantity

Any of (A) or (B)

Neither (A) nor (B)

The internal energy of a system does not depend upon the

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initial state of the system

final state of the system

path

none of them

Liquids and gasses have

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zero viscosity

non-zero viscosity

very large viscosity

very small viscosity

The resultant of two velocities 3 m/sec and 400 cm/sec making an angle 90° with each other is:

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20 m/sec

5 m/sec

3 m.sec

None of these

The concept of electric field theory was introduced by

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Michael Faraday

Newton

Dalton

Kepler

Einstein

Improper biasing of a transistor circuit produces

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Heavy loading of emitter current

Distortion in the output signal

Excessive heat at collector terminal

Faulty location of load line

Acceleration of a body is negative if the velocity of the body is

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constant

increasing

decreasing

none of them

According to Stoke's law, drag force depends on

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Initial velocity

Final velocity

Terminal velocity

Instantaneous velocity

The unit of work function is:

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Joule

Electron volt

That of threshold frequency

Both (A) and (B)

None of these

Brownian motion increases due to

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Increase in size of Brownian particle

Increase in temperature of medium

Increase in density of medium

Increase in viscosity of medium

A resistance used in galvanometer to make it voltmeter is called

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shunt resistance

high resistance

zero resistance

none of these

A 100 kg car is moving at a speed of 10 m/sec and comes to rest after covering a distance of 50 m. the amount of work done against friction is:

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+5 x 10¹J

+5 x 10²J

+5 x 10³J

+5 x 10⁴J

A rotating body tends to be slower, when its angular acceleration is:

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Positive

Negative

Zero

Infinity

One electron volt is equal to

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1.6 x 1019eV

6.25 x 1018 eV

1.6 x 1018 eV

6.25 x 1019eV

The phase determines the

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displacement

amplitude

frequency

state of motion of vibrating body

The loudness and pitch of a sound note depends on

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Intensity and velocity

Frequency and velocity

Intensity and frequency

Frequency and number of harmonic

The decrease in velocity per unit time is called:

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Variable Acceleration

Average Acceleration

Retardation

None of these

In wilson cloud chamber, the air becomes saturated with:

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Alcohol vapours

Water

Helium gas

Nitrogen gas

None of these

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

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

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BACosѲ

Zero

BA

BA sinѲ

None of these

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