Question # 1

One complete round trip of a vibrating body is called.

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Frequency

Time period

Vibration

Amplitude

Standard metal according to Michelson's interferometer is equivalent to

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1553163.5 wave meter

3 x 108meter

15503000 meter

None of these

Teh speed of sound in air is 340 m/s. If the pressure of air is doubled then the speed becomes.

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Double

Half

Four times

Remains same

Blood has density equal to that of

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Mercury

Sodium

Honey

Water

the study of nature is classified into

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Five brancehs

Six Branches

Two Branchs

None of these

Bright fringes are also called as

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Minima

Maxima

Wave front

Ray of light

The magnifying power is also called

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Resolving power

Angular magnification

Strength of eye

None of these

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

When two identical travelling waves are superimposed, velocity of resultant wave.

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Decreases

Increases

Remain same

Becomes zero

A convex lens acts as diverging lens if the object is placed at

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F

2F

Between F and 2 F

Within the F

When the car moves with an increasing acceleration then its velocity time graph is always

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Constant

Variable

A straight line

A curve

Weight of a 60 kg man in moving elevator with constant acceleration of 1/2 f

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Zero

300 N

600 N

200 N

The final image seen through ey piece in telescope is.

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Real, enlarge and inverted

Vertual, enlarge and erect

Virtual, enlarge and inverted

In Real, enlarge and erect

The mathematical expression for the restoring force is.

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F = kx

F = ma

F = dp/dt

F = -kx

Vectors have

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Numerical value

Directional

Both a and b

None of these

The formula of centripetal acceleration is

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Average acceleration is a

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Scalar quantity

Vector quantity

(-) ve quantity

None of these

Newton's laws of motion were published in

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1587

1687

1787

1887

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