Question # 1

The unit of momentum is:

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kgms^-2

kgms^-1

Ns^-1

None of these

Anything kept in thermos :

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In temperature remain constant

Its temperature decrease

Its temperature increase

None of these

The fastest bird falcon has speed.

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100 kmh^-1

200 kmh^-1

300 kmh^-1

400 kmh^-1

Mass per unit volume is:

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Velocity

Work

Density

None

The unit of torque is:

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N

Nm

m

m/n

Friction is due to

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Roughness

Shape

Smoothness

None

If a force F makes an angle θ with the direction of motion of the force, then the formula for the work done will be:

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W = FS

W = FS cosθ

W = FS sinθ

W = FS tanθ

A car is made on the principles of

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Electronics

Thermodynamics

Electricity

Mechanics

The temperature if steam is

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0°C

100°C

273°C

-273°C

The kinetic energy of a body of mass 2 kg is 25 J. Its speed is:

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5 ms^-1

12.5 ms^-1

25 ms^-1

50 ms^-1

The SI unite of density is

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gcm-3

gm-3

gdm-3

kgm-3

Volt is named after the Italian physicist:

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Faraday

Alessandro volta

Newton

Coulomb

A transformer has Np =100 and Ns =500 , if 6 volt D.C is applied across its primary, the induced voltage.

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0 V

30 V

45 V

60 V

Resistance of conductor is directly proportional to:

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Length

Pressure

Area

All of these

Half of radius of curvature is called:

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Focal length

Principal focus

Axis

Aperture

The displacement produced in the spring is directly proportional to force is called:

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Hook’s law

Boyle’s law

Newton’s law

Joule’s law

The combined resistance of two identical resistors, connected in series is 8Ω. Their combined resistance in a parallel arrangement will be:

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2 Ω

4 Ω

8 Ω

12 Ω

A positive electric charge:

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Attracts other positive charge

Repels other positive charge

Attracts a neutral charge

Repels a neutral chage

If we double the distance between two charges, what will be the change in the force between them?

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Half

Double

One fourth

Four times

If the potential energy of none coulomb charge is one joule then its potential will be:

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5 volt

2 volt

3 volt

1 volt

Old people can not hear sound above then _____ Hz

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1000

15000

20000

10000

For normal person audible frequency range for sound wave lies between.

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10 Hz and 10KHz

20 Hz and 20KHz

25 Hz and 25KHz

30 Hz and 30KHz

NC-1 is the SI unit is

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Force

Charge

Current

Electric intensity

The 1^st Bohr atom in the hydrogen atom has radius

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3.56 x 10^-10 m

0.053 x 10^-11 m

0.53 x 10^-11 m

5.30 x 10^-11 m

The typical nuclei are less than:

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10^-16m

10^-14m

10^-12m

10^-10m

The symbol of p-n-p transistor is

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Transistor was discovered by

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Young

Curie

John Bardeen

Shale's

In a certain circuit, I_{B = 40 µA,}I_C= 20 mA

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450 amp

0.45 amp

5 m amp

500 amp

The domain theory of magnet is important to explain the behaviour of

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Diamagnets

Paramagnets

Ferromagnets

All of these

A capacitor is perfectly insulator for:

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Direct current

Alternating current

Direct as well as alternating current

None of these

The acceleration of an electron of mass m and charge e, moving with uniform speed v at right angles to a magnetic field of flux density B, is given by

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Bevm

Gamma radiations are emitted due to:

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De-excitation of atom

De-excitation of nucleus

Excitation of atom

Excitation of nucleus

The negative sign with induced emf in Faraday's law is in accordance with

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Lenz's law

Amperes law

Boyle's law

Gauss law

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