Question # 1

The charged nucleus of an atom itself spins its magnetic field

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equal to the field produced by orbital electrons

greater than the field produced by orbital electrons

much weaker than the field produced by orbital electrons

none of these

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

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Metal has high specific heat

Metal has high thermal conductivity

Metal has low specific heat

Metal has low thermal conductivity

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5μF

10μF

3μF

6μF

The vertical component of velocity of a projectile during its motion is minimum

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at the time of projection

at the highest point

just before hitting the plane of projection

all of them

At resonance, the phase angle for RLC series resonance circuit equals

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0°

90°

180°

270°

The concept of direction and position are purely

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absolute

relative

absolute or relative

none of these

The length of a metallic rod is 5 meter at 100°C. The coefficient of cubical expansion of the metal will be

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2.0 x 10^-5/°C

4.0x10^-5/°C

6.0x10^-5/°C

2.33x10^-5/°C

The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become

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7.20 N

11.25 N

22.50 N

45.00

A pair of quark and antiquark makes a:

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Meson

Baryon

Proton

Neutron

None of these

In a normal healthy person the value of systolic pressure is

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75 torr

80 torr

120 torr

all of them

What is frequency of radio waves transmitted by a station, if the wavelength of those waves is 300 m?

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1 MHz

10 Hz

1 GHz

100000 Hz

The absolute temperature of the tripple point of water is

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100°C

4°C

373 K

273.16 K

If the length of the conductor is double and its cross sectional area is halved, its conductance will

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Increase four fold

Become one-fourth

Become one-half

Remains unchanged

The torque per unit twist of coil is called

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proportionality constant

gravitational constant

boltzman constant

coupling constant

Electromagnetic waves emitted by hot bodies are called:

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Photoelectrons

Alpha rays

Thermal radiation

None of these

The earth’s potential and potential at infinity are taken:

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Equal

Zero

First is greater than the second

Second is greater than the first

Both (A) and (B)

A vehicle of mass 120 kg is moving with a uniform velocity of 108 km/h. The force required to stop the vehicle in 10s is

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120 x 10.8 N

180 N

720 N

360 N

A carnot cycle consists of

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One step

two step

three steps

four steps

The fractional change in resistance per kelvin is known as

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temperature coefficient

resistance coefficient

super temperature

critical temperature

Which one of the following has larger value of relative permitivity E_rat room temperature?

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Vaccum

Air

Glass

Water

The vibratory or oscillatory motion of a body is

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translatory motion

back and forth motion about its mean position

free all motion

circular motion

Internal energy is the sum of all the forms of

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K.E

P.E

both of them

none of them

In the region surrounding a current carrying wire:

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A magnetic field is setup

The lines of force are elliptical

Direction of lines of forces depends upon direction of current

Both (A) and (C)

All of these

When platinum wire is heated, then at the temperature of 500 ^oC, it becomes:

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Yellow

Orange red

Dull red

White

Cherry red

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

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Forward

Backward

Downward

none of these

A snooker ball moving with velocity V collides head on with another snooker ball of same mass at rest. If the collision is elastic, the velocity of second snooker ball is

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Zero

Infinity

V

2 V

The ratio of energy E to the corresponding frequency (f) of the radiation (emitted or absorbed) is called:

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Wien's constant

Stefen's constnat

Planck's constant

Boltzmann's constant

None of these

The electric flux through any surface depends upon:

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Intensity of electric field

Area of the surface

Angle between intensity and area

All of these

None of these

Which of the following does not have the same units:

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Work

Heat

Kinetic energy

Power

An object thrown upward with an initial velocity at certain angle with the horizontal and moving freely under the action of gravity is called

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a rocket

an aeroplane

a projectile

a ballon

When the bob of simple pendulum is at extreme position, its K.E. will be

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maximum

minimum

zero

all of them

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