A resistor is connected to a battery of emf 10 V and internal resistance `0.3 Omega.` What is the resistance of the resistor to be inserted in the circuit for the circuit current 1.2A?

A cell of emf 2 V and internal resistance 0.1Ohm is connected to a 20 Ohm resistor .What is the current in the circuit ?

A 10 V cell of negligible internal resistance is connected in parallel across a battery of emf 200 V and internal resistance 38 Omega as shown in the figure. Find the value of current in the circuit.

If the combination is connected to a battery of e.m.f. 12 V and negligible internal resistance, obtain the potential drop across each resistor.

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

First a set of n equal resistors of R each are connected in series to a battery of emf E and internal resistance R. A current I is observed to flow. Then, the n resistors are connected in parallel to the same battery. It is observed that the current is increased 10 times. What is 'n'?

Three resistors 2 ohm ,4 ohm and 5 ohm are combined in parallel and the combination is connected to a battery of emf 20 V and negligible internal resistance, determine the current through each resistor, and the total current drawn from the battery.

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