NTPC CBT-2 Physics Quiz - 34

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Question 1:

What is the S.I unit of Frequency?

Hertz

Metre/Second

Radian

Watt

Gamma rays have greatest similarity with –

α-rays

β-rays

X-rays

U.V.-rays

What is density?

V×M

M×V

V/M

M/V

Which of the following would have the highest resistivity?

Copper wire of 5 cm length and 1mm diameter

Copper wire of 20 cm length and 0.5 mm diameter

Copper wire of 15 cm length and 2.0 mm diameter

All the wires would have the same resistivity

One Hertz(Hz) is equal to how many Decibles (dB)?

90 dB

105 dB

110 dB

Can’t convert