NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 3

EASY

12th ICSE

IMPORTANT

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What is meant by drift velocity?

Important Questions on Electric Resistance and Ohm's Law

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 3

What is meant by relaxation time?

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 4

Write, in terms of

n, e, v_{d}

for a current-carrying wire of cross-section A number of free electrons passing through a cross-section of the wire in a time-interval

∆ t

.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 4

Write, in terms of

n, e, v_{d}

for a current-carrying wire of cross-section

A

current in the wire.

EASY

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 4

Write, in terms of

n, e, v_{d}

for a current-carrying wire of cross-section

A

current density in the wire.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 5

Define current density. Write an expression which connects current density with drift speed.

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 6

Explain the statement : 'Temperature coefficient of resistance of a metal is

4 x 10^{- 3} per ° C

'.

EASY

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IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 7

A metallic plug $AB$ is carrying a current $I$ (Fig.). State how the drift velocity of free electrons varies, if at all from the end $A$ to $B$ end.

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EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 8

Define electrical resistivity of a material.