HARD
12th Odisha Board
IMPORTANT
Earn 100

Explain the origin of electrical resistance in a conductor.

Important Questions on Electric Current

HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 13
Explain why metals are good conductors of electricity?
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 14

Define the term resistivity. Mention its unit in S.I. system.

MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 15
How many electrons pass in 16 sec through the cross-section of a metal wire carrying a current of 100mA ?
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 16
Define the term resistivity and write the S.I unit.
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 17
Define electrical conductivity of a conductor and give its S.I. unit.
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 18
If the potential difference applied across from V to 2V. How the drift velocity of the electron change ?
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 19
The metallic conductor is at a temperature θ1 . The temperature of the metallic conductor is increased to θ2. How will the product of its resistivity and conductivity change?
MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 20
Write an expression for the resistivity of a metallic conductor showing its variation over a limited range of the temperature.