EASY
12th ICSE
IMPORTANT
Earn 100

Write the relation between currentI in a wire drift velocity νd of free electrons in the wire.

Important Questions on Electric Resistance and Ohm's Law

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 νd. 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  j , conductivity σ and electric field intensity (E)?  
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 SI unit.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 10
Write down silver, aluminium, copper and iron in increasing order of electrical conductivity.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 11
Write down the relation between drift velocity vd and potential difference V.
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 12
What is the effect of the increase of the electric field upon the drift velocity of electron?
EASY
12th ICSE
IMPORTANT
NOOTAN ISC PHYSICS Class 12 Part-1>Chapter 5 - Electric Resistance and Ohm's Law>QUESTIONS>Q 13
What are the factors on which the resistance of a conductor depends? Write the relation.