In the circuit shown the variable resistor X is adjusted so that high resistance voltmeter V shows a reading of 1 V. The resistance, then is
The figure shows a source (a battery) with an emf E of 12V with an internal resistance r of 2Ω and an external resistance of 4Ω is added to complete the circuit. What are the voltmeter and ammeter readings?
In the circuit shown in figure, the ammeter shows 5 A current, voltmeter shows 250 V and the internal resistance of the voltmeter is 2500 Ω, then the value of R is:
Figure shows an arrangement to measure the emf ϵ and internal resistance r of a battery. The voltmeter has a very high resistance and the ammeter also has some resistance. The voltmeter reads 1.52 V when the switch S is open. When the switch is closed the voltmeter reading drops to 1.45 V and the ammeter reads 1.0 A. Find the emf and the internal resistance of the battery.