Define electrical resistivity of a material.

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 9

The specific resistance of manganin is $44 x {10}^{-8} \mathrm{\Omega }-\mathrm{m}$. Explain this statement.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 10

What is specific conductance? Give its unit and dimensions.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 11

How does the resistivity of a conductor vary with temperature?

EASY

12th ICSE

IMPORTANT

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

If the temperature of a good conductor increases, how does the relaxation time of electrons in the conductor change?

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 13

State whether the temperature coefficient of resistance $\alpha$ is positive or negative for $\mathrm{Cu}$.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 13

State whether the temperature coefficient of resistance $\alpha$ is positive or negative for $\mathrm{Si}$.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 13

State whether the temperature coefficient of resistance $\mathrm{\alpha }$ is positive or negative for $\mathrm{Ag}$.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 13

State whether the temperature coefficient of resistance $\alpha$ is positive or negative for $\mathrm{Ge}$.