Write the relation between coulomb and ampere.

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 2

What is the order of the number of free electrons in metals?

EASY

12th ICSE

IMPORTANT

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

What is relaxation time of free electrons in metals?

EASY

12th ICSE

IMPORTANT

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

What is meant by drift speed of free electrons?

EASY

12th ICSE

IMPORTANT

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

Write the relation between current$I$ in a wire drift velocity ${\mathrm{\nu }}_d$of free electrons in the wire.

MEDIUM

12th ICSE

IMPORTANT

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

A current $I$ flows through a metallic wire of radius$r$ and the free electrons in it drift with a velocity${\nu }_d$. Calculate the drift velocity of the free electrons through the wire of the same material, having double the radius, when same current flows through it.

EASY

12th ICSE

IMPORTANT

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

For a metallic conductor, what is the relation between current density$\left( \mathrm{j} \right)$, conductivity $\left(\sigma \right)$ and electric field intensity$\left(\mathrm{E}\right)$?  

EASY

12th ICSE

IMPORTANT

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

Write the dimensions of resistance.

EASY

12th ICSE

IMPORTANT

NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 9

Define electric conductivity of a material. Give its $\mathrm{SI}$unit.