Question # 1

The waves which travel in straight line through space and have strong signals are called:

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Micro waves

Mechanical waves

Light waves

Magnet waves

Which of the following quantities is not change during refraction of light?

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Its direction

Its speed

its frequency

Its wavelength

The speed of light in water is:

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2.0x10³ ms^-1

2.5x10³ ms^-1

2.3x10⁸ ms^-1

2.3x10^-8 ms^-1

When a heavy nucleus splits into lighter nuclei,the process would.

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Release nuclear energy

absorb nuclear energy

Release Chemical energy

Absorb Chemical Energy

The sound level of rustling of leave is:

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1 dB

20 dB

30 dB

10 dB

The wave properties

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Reflection

Refraction

Diffraction

All of these

Coulomb's law is mathematically stated as:

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F = k q1 q2/r3

F = k q2 q2 / r2

F = k q1 q2 / r

F = k q1 q2 / r2

The unit of intensity of sound:

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Wm^-1

Wm^-2

Wm

Wm²

If the length of a simple pendulum is halved its time period will become:

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T/2

T = T/√2

√2T

2T

The unit of resistance is:

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Ω-m

Ω

V

C

At mean position kinetic energy of the ball is:

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Minimum

Zero

Maximum

10 J

Give the number of factors which affect the ability of a capacitor to store charge.

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2

3

4

5

At extreme position potential energy of the pendulum is:

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Maximum

Minimum

Both a and b

Zero

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