Question # 1

The speed of randomly moving electrons depends upon

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pressure

volume

temperature

mass

The current through a metallic conductor is due to the motion of

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protons

neutrons

electrons

free electrons

When monochromatic light is allowed to fall on cathode, it begins to emit electrons, these electrons are called

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thermoionic electrons

free electrons

photoelectrons

slow electrons

A particle having the mass of electron and charge of a proton is called a

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photon

position

antiproton

antineutrino

The mass of the object is a quantities measure of its

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speed

velocity

acceleration

inertia

Micheal Faraday and joseph Henry belong respectively to:

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USA and England

England and France

England and USA

USA and France

None of these

The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:

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Lummer

Planck

Pringsheim

Both (A ) and (B)

Both (A) and (C)

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

For making cooking utensils, which of the following pairs of properties is most suited?

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Low specific heat and high conductivity

Low specific heat and low conductivity

High specific heat and high conductivity

High specific heat and low conductivity

The projectile attains maximum horizontal range when it is projected at an angle of

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30°

45°

60°

75°

One coulomb of charge is created by

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10 electrons

1.6 x 10^-19electrons

6.25 x 10¹⁸electrons

6.25 x 10²¹electrons

At the top of the trajectory of a projectile the acceleration is

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The maximum

The minimum

Zero

g

A current carrying conductor sets up its own:

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Electric field

Nuclear field

Magnetic field

Both (A) and (C)

All of these

The field around a moving charge is called

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magnetic field

conservative field

non-conservative field

none of these

Op-amp has been discussed as comparator of:

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Distances

Voltages

Velocities

Magnetic fields

Both (A) and (C)

Drag force increases if speed of the object moving through the fluid:

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Increases

Decreases

Remains constant

None of these

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

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n/AL

Al/n

nAL

nA/L

The vector representation of force experience give the direction of

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magnetic field

current

length of conductor

force

A changing magnetic flux creates around itself

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An electromotive force

An electric field (changing electric flux)

Magnetic field

None of the above

Example of vibratory motion is

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mass suspended from a spring

a bob of simple pendulum

mass attached to a spring placed

all of them

What is another name for laminar flow?

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streamline

unsteady flow

turbulent flow

both (a) and (b)

A body is moving with constant velocity of 10 m/sec in the north east direction. Then its acceleration will be:

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10 m/sec2

20 m/sec2

30 m/sec2

Zero

Which quantity is important in stating the entropy of the system

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initial entropy

final entropy

change in entropy

none of them

Electric generators which convert mechanical energy into

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solar energy

thermal energy

kinetic energy

electrical energy

Acceleration produced in a body by the force varies

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inversely as the applied force

directly as the applied force

directly as the mass of the body

none of them

Shock absorber of the car is an example of

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resonance

forced oscillations

interference

damped oscillations

Electron volt is the unit of

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Potential difference

Energy

Resistance

Capacitance

Distance traveled by a body falling from rest in the first, second and third second is in the ration of

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1 : 2 : 3

1 : 3 : 5

1 : 4 : 9

None of the above

R.M.S velocity of a particle is V at pressure P. If pressure increases by two times, then R.M.S velocity becomes

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2V

3V

0.5V

V

The counter, which also provides the power to the G.M. tube is called:

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Thin mica window

thin glass window

Airy window

Wooden window

None of these

A 120 m long train is moving in a direction with speed 20 m/s. A train B moving with 30 m/s in the opposite direction and 130 m long crosses the first train in a time

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6 s

36 s

38 s

None of these

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