Question # 1

When the object lies between F and 2F, the image formed by is formed at:

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Real

Virtual

Diminished

Erect

The distance covered by the wave in one second is:

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Wave number

Wave length

Frequency

Wave speed

The system international (SI) is built from _______ kind of unites

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Two

Three

Four

Five

A photon is considered to have

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Momentum

Energy

Wavelength

All of the above

The bands below the valence band are

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completely filled and play active part in conduction process

completely filled and plays no part in conduction process

completely filled and play active part in conduction process

not completely filled and play no part in conduction process

The positron was discovered by:

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In cosmic radiation

In 1932

By Carl Anderson

All above

By direc

Which of the following forces is responsible for SHM

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Applied force

Restoring force

Fractional force

Elastic force

In order to produce pair production, a photon must have a energy

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0.511 Me v

0.256 Me v

1.02 Me v

0.956 Me v

The instrument used to gather information form the far side of the universe is

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Compound microscope

Radio telescope

Astronomical Telescope

Simple microscope

If an amount of heat enters the system it could

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decrease the internal energy

not change the internal energy

increase the internal energy

none of them

In SHM, the acceleration is ______ when velocity is _____:

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Zero, smallest

Smallest, zero

Zero, zero

Zero, greatest

If a transverse wave has a speed of 10 m/ sec and frequency of 10 cycle/ sec itswavelength is:

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1 m

10^-2 cm

10 m

10 cm

The SI unit of stress is

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Nm²

Nm

dynesm^-1

N

When a ray of light enters a denser medium from a rarer medium,its:

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Wavelength increases

Velocity increases

Frequency decreases

Wavelength decreases

The SI units of displacement is

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m

kg

ms^-1

None of these

A capacitor is charged with a battery and then it is disconnected A slab of dielectric is now inserted between the plates then

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The charge in the plates reduces and potential difference increase

Potential difference between the plates increases stored energy decreases and charge remains the same

Potential difference between the plates decreases,stored energy decreases and charge remains unchanged

None of the above

How would the two vectors of the same magnitude have to be oriented. If they were to be combined to give a result equal to a vector of the same magnitude.

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60^o

120^o

270^o

None of these

In an inertial frame of reference the weight of body equal to

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Force of attraction

Coulomb's force

Force of gravity

All of these

A space ship has the radius of 9.8m. To produce an artificial gravity of 9.8m/sec² the spinning speed is

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9.8 m/sec

1 m/sec

19.6 m/sec

None of these

When brakes are applied to a fast moving car, the passengers will be thrown:

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Forward

Backward

Downward

None of these

Base quantities are those which

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Remain the same

Can be derived

Further divided

None of these

The work done in taking a charge q once round a circle of radius r and having a charge Q at the centre is

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qQ/4πε_°r²

qQ/(4πε_°r)

qQ/[4πε_°](2πr)

Equal

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