HARD
12th Odisha Board
IMPORTANT
Earn 100

Define electrical conductivity of a conductor and give its S.I. unit.

Important Questions on Electric Current

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.
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 1
Explain the meaning of the drift velocity of electrons. Find an expression for current in conductor in terms of it
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 2
State and explain Ohm's law. Deduce it mathematically. Distinguish between ohmic and non ohmic resistance .
MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 3
Deduce the relation J→=σE→ from first principles considering Ohm's law to be true.
HARD
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 4
Discuss the different factors on which the resistance of a conductor depends. How does a semiconductor differ from a conductor?
MEDIUM
12th Odisha Board
IMPORTANT
Bureau's Higher Secondary Physics Class 12>Chapter 5 - Electric Current>MODEL QUESTIONS>Q 5
Show that current density J→=ne2τmE→ ?