Question # 1

The work done moving a body between two points in a conservation field is independent of the:

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Direction

Force applied

Path followed by the body `

Power

Work done is maximum when angle between force and displacement is

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0°

90°

180°

None of these

A body starting from rest covers a distance of 0.45 Km and acquires a velocity of 300 Kmh^-1. its acceleration will be

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7.71 m s^-2

0.5m s^-2

0.15m s^-2

0.092m s^-2

In reverse-biased p-n junction, the reverse current is due to flow of:

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Minority charge carriers

Majority charge carriers

Free electrons from p to n-region

Holes from n to p-region

all are true except (B)

When the particles of the medium vibrate about their mean position, along the direction of the motion of waves, then the waves are called:

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Longitudinal waves

Transverse waves

Water waves

Complex waves

The unit of work in CGS system is

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Joule

Erg

Dyne

Watt

A body moving along the circumference of a circle of radius R completes one revolution. The radius of a covered path to the angle subtended at the centre is:

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Radius of the circle

Twice the radius

Thrice the radius

None of these

What is the coefficient of mutual inductance, when the magnetic flux changes by 2 X 10^-2Wb, and change in current is 0.01 A?

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2 H

3 H

1/2 H

Zero

The magnitude of the displacement is a line from initial position to final position which is

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straight

curved

either be curved or straight

none of them

If a 40 watt light bulb burns for 2 hours. how much heat is generated

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288 x 10³J

288 x 10⁸J

288 x 10⁵J

288 x 10⁶J

In crystalline solids, atoms are held about their equilibrium positions depending upon the strength of:

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Adhesive force

Nuclear forces

Inter atomic cohesive force

Electromagnetic force

None of these

In Young's double slit experiment, the widths of dark and bright fringes are

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different

equal

zero

variable

Angular momentum is

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A scalar

A vector

Neither A.nor B.

Either A.or B.

Two metallic sphere of radius 1 cm and 2 cm get equal quantity of charge. Which has greater surface charge density

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1^st sphere

2^nd sphere

Both get equal surface

None

The internal energy of a gram mole of an ideal gas depends upon

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Pressure alone

Volume alone

Temperature alone

Both pressure and temperature

In Young's double slit experiment for the interference of light, the central region of the fringe system is

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Bright

Dark

Bright and dark

None of these

We can achieve polarization by

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Absorption

Reflection

Scttering

All of above

The dimensional formula for latent heat is:

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M^°L²T¹

ML²T^-2

MLT^-2

ML²T^-1

The dimensions of power are

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[ML²T²]

[ML²T^-2]

[ML²T^-3]

[M²LT^-3]

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

Which one of the following can act approximately as a source of monochromatic light

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Neon lamp

Fluorescent tube

Sodium lamp

none of these

A we go from the equator to the poles, the value of weight

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Remains the same

Increases

Decreases

Decreases up to a latitude of 45°

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