Question # 1

The special theory of relativity treats problems invoving

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inertial frame of references

accelerating frame of references

both of these

none of these

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

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200 J

100 J

1000 J

400 J

The doped semi-conductor materials are known as

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intrinsic semi-conductor

extrinsic semi-conductor

either of them

none of them

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

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Circular and endless

Oval in shape and endless

Straight

Parabolic

All are true

0.10 cm can be written as:

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1.0 x 10^-2m

1.0 x 10^-3cm

1.0 x 10^-4cm

1. x 10^-4m

A 60 W bulb operates on 220 V supply. The current flowing through the bulb is

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11/3 A

3 A

3/11 A

6

In gases, the charge carries are:

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Electrons

Positive ions

Negative ions

Both (A) and (C)

Both (A) and (B)

If we connected the ordinary DC ammeter to measure alternating current, it would measure its:

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Instantaneous value

RMS value

Value averaged over a cycle

Either (B) or (C)

Either (A) or (C)

At what temperature the adiabatic change is equivalent to the isothermal change?

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Zero degree Celsius

Zero Kelvin

Critical temperature

Above critical temperature

The expression for restoring force is

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F=ma

F=kx

F= -kx

Kx=ma

The threshold frequency of sodium is 6 x 10⁶MHz. The cut-off wavelength for this metal will be

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500 m

500 nm

500 km

500 cm

None of these

Tick the one which is not polymer solid:

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Zirconia

Polythene

Nylon

Synthetic rubber

None of these

A second's pendulum is a pendulum whose time period is

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1 second

2 seconds

3 seconds

4 seconds

The charge carriers in gases are

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electrons

ions

protons

ions and electrons

A black body is

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an ideal absorber

an ideal radiator

both of them

none of them

The volume of given mass of a gas will be doubled at atmosphere pressure if the temperature of the gas is changed from 150°C to

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300°C

573°C

600°C

743°C

A potential barrier of 0.7 V exists across p-n junction made from:

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Germanium

Silicon

Arsenic

Gallium

Indium

During the upward motion of the projectile, the vertical component of velocity:

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Decreases

Increases

Remains constant

None of these

In the doping process, the ratio of the doping atoms to the semi conductor atom is

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1 to 10

1 to 10³

1 to 10⁶

1 to 10⁹

When a horse pulls a cart, the force that makes the horse run forward is the force exerted by

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The horse on the ground

The horse on the cart

The ground on the horse

The ground on the cart

β-particles are easily deflected by collisions than heavy

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α-particles

β-particles

γ-particles

none of these

A long wire wound tightly on a cylindrical core is called:

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Potentiometer

Solenoid

Toroid

Wheat and stone bridge

None of these

In Bernoulli's theorem the relation between velocity and pressure is

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Inverse

Direct

None of the above

Both a and b

In order to have a constant current through wire, the potential difference across its end should:

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Be zero

Be maintained constant

Goes on increasing

Go on decreasing

Both (A) and (B)

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

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A - Z

A + Z

Z

A

If v is the velocity of flow of liquid through a tube of area of cross-section A, then according to equation of continuity

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v/A = constant

A/v = constant

Av = constant

None

The body will move with terminal velocity when it acquires

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minimum speed

zero speed

maximum speed

none of them

Charge on neutron is

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1.6 x 10^-19C

zero

-1.6 x 10^-19C

1.2 x 10^-19C

The waves moving from a sitar to a listener in air are

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Longitudinal progressive

Longitudinal stationary

Transverse progressive

Transverse stationary

Current, voltage, resistance measuring circuit is connected with the galvanometer with the help of switch, known as

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ON switch

off switch

function switch

none of these

The nucleus left after the emission of some radiation is called:

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Parent nucleus

Daughter necleus

Mother necleus

Any of these

None of these

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