Question # 1

Who discovered the phenomenon of natural radioactivity?

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Henry Becurial

Merry Curi

Perry

Rutherford

The unit of electric power is:

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Volt

Watt

Joule

Coulomb

If current is flowing from bottom end to the top end in a wire, according to right hand rule the direction of line of forces would be:

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Anti-clock wise

Clock wise

Left and Right

Along the conductor.

with the increase in temperature the resistance of pure metals:

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increases

decreases

remains same

none of these

In compound microscope, the objective have focal length than eye-piece:

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Smaller

Larger

Equal

Equal and larger

Specific resistance of silver is:

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1.7x10^-8 Ω.m

2.63x10^-8 Ω.m

2.75x10^-8 Ω.m

7.0x10^-8 Ω.m

According to Ohm's law V =________

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I²R

IR²

IR

I/R

Which one is a safety device?

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Switch

Fuse

Circuit breaker

Both B and C

The refractive index of internal coating of optical fibre is:

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1.56

1.51

1.53

1.58

The intensity level of train siren is:

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150 dB

100 dB

130 dB

120 dB

The sound level of rustling of leave is:

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1 dB

20 dB

30 dB

10 dB

What type of graph is in between V and I?

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Curved

Parabola

Straight line

None of these

the unit of frequency is:

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hertz

vibration per second

cycle per second

all a, b and c

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10th Class Physics English Medium KPK Boards Online Mcqs MCQs With Answers

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