A battery of e.m.f 12 V supplies a current through a oil of resistance 48 ohm. The internal resistance of the battery is 1.2 ohms. A voltmeter of resistance 72 oohm is sued to measure the potential difference across the coil. What value would it show?

A bulb whose resistance is 10 ohm is connected to a 6 V battery. Calculate the potential difference across the bulb.

A cell supplies a current of 0.3 A through a resistance of 7 ohm and a current of 0.9 A through a resistance of 2 ohm. The internal resistance of the cell is

How can a voltmeter of resistance 200 ohm and measuring 10 V be used to measure a current of 5 A?

Two resistances of 400 ohm and 800 ohm are connected in series with 6 volt battery of negligible internal resistance. A voltmeter of resistance 10,000ohm is used to measure the potential difference across 400 ohm. The error in the measurement of potential difference in volt approximately .

The internal resistance of a cell of e.m.f. 2 V is 0.1 Omega . It is connected to a resistance of 3.9Omega . The voltage across the cell will be

The internal resistance of a cell of e.m.f. 2 V is 0.1 Omega . It is connected to a resistance of 3.9Omega . The voltage across the cell will be

If a battery of e.m.f 6.6 V can supply a current of 3A through a resistance of 1.8Omega , what curent does it supply through another resistance of 2.9Omega . Also calculate internal resistance of the battery.

A battery of e.m.f. 3 volt and internal resistance r is conneted inseries with a resistance of 55 ohm through an ammeter of resistance 1 ohm. The ammeter reads 50 mA. Draw the circuit diagram and calculate the value of r.