Question # 1

In a normal healthy person the value of diastolic pressure is

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75 - 80 torr

100 torr

120 torr

none of them

The temperature of gas is produced by

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At potential energy of its molecules

The kinetic energy of its molecules

The attractive force between its molecules

The repulsive force between its molecules

The term drift velocity is used when the ends of a wire are:

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Connected to a laser source

Connected to a voltage source

Not connected to a voltage source

At different values of potential

Both (B) and (D)

Melting point of ice

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Increases with increasing pressure

Decreases with increasing pressure

Is independent of pressure

Is proportional to pressure

SI unit of frequency is

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second

hertz

revolution

vibrations/sec

In a surface tension experiment with a capillary tube water rises up to 0.1 m. if the same experiment is repeated on an artificial satellite, which is resolving around the earth, water will rise in the capillary tube up to a height of

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0.1 m

0.2 m

0.98 m

Full length of the capillary tube

Work done is independent of path followed in _______

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Gravitational field

Magnetic field

Electric field

All of these

When a platinum wire is heated, it appears white at

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1600°C

900°C

1100°C

1300°C

The motion in a plane is the motion in

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one dimension

two dimension

three dimension

four dimension

If the distance of separation between two chares is increased, the electrical potential energy of the system will

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Increase

Decrease

May increase or decrease

Remain the same

Conventionally, all the distance p, q, f are measured from _____ of the lens:

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Focus

Optical center

Edges

None of these

The correct unit of power is

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Kilowatt

Dynes

Joule

Kilowatt-hour

A lift is moving up with acceleration equal to 1/5 of that due to gravity.The apparent weight of a 60 kg man standing in lift is:

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60 kg wt

72 kg wt

48 kg wt

Zero

A person A is going up in a balloon while another person is going down into a mine.Both are measuring the gravitational field.

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The field measured by both A and B goes on increasing.

The field measure by A Increases while the measured by B decreases

The field measured by A decreases while that measured by B decreases

The field measured by A decreases while that measured by B increases

The conduction of electrons takes place and conduct electric current through solids is a

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Energy band

Conduction band

Valence band

Completely filled band

The mass of the object is a quantitative measure of

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Motion

Momentum

Inertia

None of these

For a freely falling elevator everything in it

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Will have maximum weight

Will have minimum weight

Will be weightless

None of these

The S.I. unit of stress is also

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Force

Pascal

Momentum

None of these

If the wavelength of light used in Michelsion's interferometer is 400 nm and the moveable mirror only moved throughλ/4, then the length moved will be

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10 nm

10^-2mm

1 nm

10^-4mm

The minimum velocity necessary to put a satellite into the orbit is called critical velocity of the value

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6.7 kms^-1

7.9 kms^-1

8.1 kms^-1

9.1 kms^-1

A projectile is thrown at an angle of 30° with horizontal with a velocity of 980 m sec^-1. The time of flight to reach the highest point of its trajectory is:

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50 sec

100 sec

150 sec

250 sec

The high-tensile steel used to support the roadway of a suspension bridge breaks under a stress of 2 x 10⁹Pa. Find the minimum cross-sectional area for a cable if it is to support a load of mass 2 x 10⁵kg.

(g = 10 N kg^-1)

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10^-2m²

10^-1m²

10^-4m²

10^-3m²

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