EASY
12th CBSE
IMPORTANT
Earn 100

A conductor of length l is connected to a d.c. source of emf 'ε'. If the length of the conductor is tripled by stretching it, keeping ‘ε’ constant, explain how its drift velocity would be affected.

Important Questions on Current Electricity

EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>HOTS Problems on Higher Order Thinking Skills>Q 3
Write the nature of path of free electrons in a conductor in the presence of electric field.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>HOTS Problems on Higher Order Thinking Skills>Q 3
Write the nature of path of free electrons in a conductor in the absence of electric field.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>HOTS Problems on Higher Order Thinking Skills>Q 3
Between two successive collisions, each free electron acquires a velocity from 0 to v wherev=eEmτ.  What is the average velocity of a free electron in the presence of an electric field? Do all electrons have the same average velocity?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>HOTS Problems on Higher Order Thinking Skills>Q 3
How does this average velocity of the free electrons, in the presence of an electric field vary with temperature?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>HOTS Problems on Higher Order Thinking Skills>Q 4
Is current density a vector or a scalar quantity? Deduce the relation between current density and the potential difference across a current-carrying conductor of length l, area of cross-section A, and number density of free electrons n. How does the current density, in a conductor vary with increase in potential gradient?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>HOTS Problems on Higher Order Thinking Skills>Q 4
Is current density a vector or a scalar quantity? Deduce the relation between current density and the potential difference across a current-carrying conductor of length l, area of cross-section A, and number density of free electrons n. How does the current density, in a conductor vary with increase in temperature?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>HOTS Problems on Higher Order Thinking Skills>Q 4
Is current density a vector or a scalar quantity? Deduce the relation between current density and the potential difference across a current-carrying conductor of length l, area of cross-section A, and number density of free electrons n. How does the current density, in a conductor vary with increase in length?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 3 - Current Electricity>HOTS Problems on Higher Order Thinking Skills>Q 4
Is current density a vector or a scalar quantity? Deduce the relation between current density and the potential difference across a current-carrying conductor of length l, area of cross-section A, and number density of free electrons n. How does the current density, in a conductor vary with increase in area of cross-section? (Assume that the other factors remain constant)