[" gh a resistor of "5Omega" Calculate the least number of cells in a mixed "],[" emf "2V" and internal resistance "0.5Omega.]

A cell of e.m.f. 2V and internal resistance 0.5Omega is connected across a resistor R. The current that flows is same as that, when a cell of e.m.f. 1.5V and internal resistance 0.3Omega is connected across the same resistor. Then

Two resistors of 5 Omega and 10 Omega are connected in parallel with a cell of emf 3 V and internal resistacne 1 Omega. Calculate the current through each of the resistors.

A cell of emf 2V produces 0.3A current when connected to a resistor of 5Omega . Calculate the terminal voltage and internal resistance of the cell.

The minimum number of cells in mixed grouping required to produce a maximum current of 1.5A through an external resistance of 30Omega , given the emf of each cell is 1.5 V and internal resistance is 1Omega is

A battery of emf 6V internal resistance 5 Omega is joined in parallel with another cell of emf of 10V and internal resistance 1Omega and the combination is used to send current through a resistor of 12Omega . Calculate the current through each battery.

An ammeter of resistance 0.5Omega is connected in the usual way to a circuit which has a cell of emf 1.5 V and an internal resistance 2Omega and a resistor 8Omega . What is the percentage error in the reading of the ammeter?

In a potentiometer circuit, the emf of driver cell is 2V and internal resistance is 0.5 Omega . The potentiometer wire is 1m long . It is found that a cell of emf 1V and internal resistance 0.5 Omega is balanced against 60 cm length of the wire. Calculate the resistance of potentiometer wire.