A car battery is of 12 V. Eight dry cells of 1.5 V connected in series can give 12 V. But such cells are not used in starting a car. Why?

Two cells of 1.25 V and 0.75 are connected in parallel. The effective voltage will be

A galvanometer, together with an unknown resistance in series, is connected across two identical batteries of each 1.5 V. When the batteries are connected in series,the galvanometer records a current of 1 A, and when the batteries are connected in parallel, the current is 0.6 A. In this case, the internal resistance of the battery

Four resistors of 12 Omega each are connected in parallel . Three such combinations are then connected in series. What is the total resistance ? If a battery of 9 V emf and negligible internal resistance is connected across the networks, find the current flowing through of each resistors.

Two cells of emf 1V and 2V and internal resistance 2 ohm and 1 ohm are connected first in series then in parallel. what should be the external resistance in the circuit so that the current through the resistance be the same in the two cases?

A 12V resistance and an inductance of 0.05/pi H are connected in series. Across the end of this circuit an alternating voltage of 130 V and frequency 50 Hz is connected. Calculate the current in the circuit and the potential differnece across the inductance.

An inductance of 2 H and resistance of 10 Omega are connected to a battery of 5 V. the time constant of the circuits is: