MEDIUM
12th Andhra Pradesh Board
IMPORTANT
Earn 100
State the working principle of potentiometer, explain with the help of circuit diagram how the emf of two primary cells are compared by using the potentiometer.
Important Questions on Current Electricity
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
HARD
12th Andhra Pradesh Board
IMPORTANT
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
What is the condition in which the heat produced in an electric circuit is :
(a) directly proportional
(b) inversely proportional
to the resistance of the circuit?
Compute the ratio of the total quantity of heat produced in the two cases.
HARD
12th Andhra Pradesh Board
IMPORTANT
MEDIUM
12th Andhra Pradesh Board
IMPORTANT
HARD
12th Andhra Pradesh Board
IMPORTANT
The average drift speed of conduction electrons in a copper wire of cross-sectional area carrying a current of is . Assume that each copper atom contributes roughly one conduction electron. The density of copper is and its atomic mass is . Write the value of to the nearest integer.
(Take and )
HARD
12th Andhra Pradesh Board
IMPORTANT