Question # 1

Neutron was discovered by

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Curie

Roentgen

Chadwick

Rutherford

Which one of the following elasticizes is possessed by fluids:

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Young's elastic modulus (length)

Bulk elastic modulus (volume)

Modulus of rigidity (shape)

None of these

At low speeds, the drag force is

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proportional to speed

inversely proportional to speed

not simply proportional to speed

none of them

Rice takes longest to cook

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In a submarine 100 m below the surface of the sea

At sea level

At Murree

At Mount Everest

Tick the series which lie/s in. the infra-red region.

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Pfund series

Brackett series

Paschen series

All of these

None of these

The use of chips in electrons is described in the form of:

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Yellow boxes

Black boxes

Red boxes

White boxes

Orange boxes

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

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0.1 watt

1 watt

10 watt

100 watt

One kilogram of different substances contain

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same number of molecules

different number of molecules

may be same or different

none of them

The unit of decay constant is:

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Second

Metre

Hour

Year

Second^-1

Electric potential of earth is taken to be zero because the earth is good

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Semiconductor

Conductor

Insulator

Dielectric

The velocity given to a body to go out of the influence of earth's gravity is known as:

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Terminal velocity

Orbital velocity

Escape velocity

None of these

If Young s double slit experiment is immersed in water then the fringes with

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Decreases

Remains unchanged

Becomes infinite

Increases

If force of friction is negligible, then acceleration of two free falling objects of different masses is

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The same

Different

Smaller mass has smaller acceleration

None of these

An are equal to radius of the circle subtended an angle of ______ at the center of circle

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1 rad

2 rad

π rad

1/2π rad

Bulk modulus for copper is

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50

75

140

147

cream gets separated out of milk when it is churned it is due to

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Gravitational force

Centripetal force

Centrifugal force

Resistance

Acceleration of a body at any particular instant during its motion is known as

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average acceleration

uniform acceleration

instantaneous acceleration

all of them

Polarization is a phenomenon in which

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Electric intensity decreases

Potential difference decreases

Charge 'Q' decreases

All of them

Magnification of a convex lens is

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M = p/d

M = p/q

M = q/p

None of these

If the velocity of the body decreases non-uniformly, then the slope of the velocity-time graph will have

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different values

same values

zero value

constant valve

If resultant of two forces (F and F) acting on a point is F,then the angle between two forces is.

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0°

45°

60°

120°

There is a certain frequency below which no electrons are emitted from the metal surface, this frequency is known as:

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Critical frequency

Threshold frequency

Maximum frequency

Minimum frequency

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