According to the Ohm's law, at constant temperature, the current flowing in a conductor is directly proportional to the electric potential applied across the terminals of the conductor. Mathematically it can be given as I ∝ V or V ∝ I So, o r V = R I Where, R a constant of proportionality which is called resistance.

Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 15

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Meter bridge is based on .

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Important Questions on Current Electricity

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 1

50 cm

of potentiometer wire from the left most point balances the e.m.f. of cell

A

and

75 cm

of potentiometer wire from the same point balance the e.m.f. of cell

B

. The ratio of e.m.f. of cell

A

and

B

will be

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 2

Meter bridge is used to measure

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 3

If radius of a potentiometer wire is doubled keeping its length and potential difference across it constant, then the value of its potential gradient will

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 5

Meter bridge is application of

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Gamma Question Bank for Medical Physics>Chapter 18 - Current Electricity>Assignment>Q 6

The SI unit of resistivity is _____.

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