A new flashlight cell of e.m.f. 1.5 volts given a current of 15 amps. When connected directly to an ammeter of resistance `0.04 Omega`. The internal resistance of cell is

Choose correct alternative. A battery of emf 2V sends a current of 0.1A when connected to a resistance 18 Omega , The internal resistance of cell is

A primary cell has an e.m.f. of 1.5 volt. When 5 Omega resistance is connected in the circuit, it gives a current of 0.2 ampere. The internal resistance of the cell is :

A cell of e.m.f. ε and internal resistance r sends a current of 1.0 A when it is connected to an external resistance of 1.9 Omega . But it sends a current of 0.5 A when it is connected to an resistance of 3.9 Omega calculate the values of epsi and r .

A cell of e.m.f. 1.8 V and internal resistance 2 Omega is connected in series with an ammeter of resistance 0.7 Omega and a resistor of 4.5 Omega as shown in Fig. What would be the reading of the ammeter ?

A primary cell has an e.m.f. 1.5 volt. When short circuited, it gives a current of 3 ampere. The internal resistance of the cell is