Question # 1

If the displacement in spring is ‘x’ of mass “m” attached with a spring then restoring force is:

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F=ma

F=kx

F=-kx

F= m/a

When frequency of sound wave is increased, which of the following decreases?

i) Wavelength ii) Period iii) Amplitude

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i only

(iii) only

i and ii only

i and iii only

Mathematical formula of sound level (in bel) is:

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S.L = 10 log I/Io (bel)

S.L = K log I/Io (bel)

S.L = Log I/Io (bel)

S.L = 10 log Io/I (bel)

If there is no extension in the spring then the position is called:

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Equilibrium position

unequilibrium

neutral equilibrium

stable equilibrium

The unit of intensity of sound:

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wm^-1

wm

wm^-2

wm^-3

The waves, which are used to detect the broken bones are called:

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Light waves

x-rays

sound waves

both b and c

The unit of spring constant is:

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m

kg

Nm²

Nm^-1

The example of shock absorber of the vehicles are:

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Simple harmonic motion

Vibratory motion

Damped motion

Linear motion

Bets can hear sound of frequency up to:

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100,000 Hz

25000 Hz

120,000 Hz

1000 Hz

The S.I unit of intensity of sound is:

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Wm

Wm2

Wm-2

Wm-1

In simple pendulum motion, restoring force is provided by:

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Air resistance

Tension in the string

Inertia

Weight of the body

At extreme position potential energy of the pendulum is:

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Maximum

Minimum

Both a and b

Zero

If the mass of bob of a simple pendulum is doubled, its time period:

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Is doubled

Becomes four times

Remains same

Becomes half

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