Home
Class 12
PHYSICS
A battery of 10 volt is connected to a r...

A battery of 10 volt is connected to a resistance of 20 ohm through a variable resistance R. The amount of charge which has passed in the circuit in 4 minutes, if the variable resistance R is increased at the rate of 5 ohm/min, is

A

120 coulomb

B

`120log_e2` coulomb

C

`120/(log_e2)` coulomb

D

`60/(log_e2)` coulomb

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

A cell of e.m.f E is connected to a resistance R_(1) for time t and the amount of heat generated in it is H. If the resistance R_(1) is replaced by another resistance R_(2) and is connected to the cell for the same time t, the amount of heat generated in R_(2) is 4H. Then the internal resistance of the cell is

A battery of emf 10V and internal resistance 3 ohm is connected to a resistor. If the current in the circuit is 0.5A, what is the resistance of resistance of resistor ? What is the terminal voltage of the battery when the circuit is closed?

A 24 v battery of internal resistance 4Omega is connected to a variable resistor. At what value of the current drawn from the battary is the rate of heat produced in the resistor maximum?

A cell of emf E and internal resistance r is connected to a variable external resistor R. the graph which gives the terminal voltage of cell V with respect to R is

An electric conductor has a resistance R and its terminal potential difference is V . If charge Q passes through it in time t , then the amount of electrical energy transmitted is

If a current of strength 3 A flows through a resistance of 20 Omega for 10 minutes, then calculate the amount of heat produced in the resistance.

A capacitor of 4 muF is charged to 400 V. Now the two plates are connected with a resistance of 2 KOmega . What will be the amount of heat through the resistance?

A uniform wire of resistance R ohm is divided into ten equal parts and all of them are connected in parallel. The net resistance is :