
A cell of unknown emf and internal resistance r, two unknown resistances and and a perfect ammeter are given. The current in the circuit is measured in five different situations:
Without any external resistance in the circuit
The current obtained in the five cases are :
, and
but not necessarily in that order. Identify the currents in the five cases listed above and calculate and .

Important Questions on Current Electricity
A cell of unknown emf and internal resistance r, two unknown resistances and and a perfect ammeter are given. The current in the circuit is measured in five different situations:
With resistance only

A cell of unknown emf and internal resistance r, two unknown resistances and and a perfect ammeter are given. The current in the circuit is measured in five different situations:
With resistance only

A cell of unknown emf and internal resistance r, two unknown resistances and and a perfect ammeter are given. The current in the circuit is measured in five different situations:
With both and used in series combination, and
The current obtained in the five cases are :
, and
but not necessarily in that order. Identify the currents in the five cases listed above and calculate and .

A cell of unknown emf and internal resistance r, two unknown resistances and and a perfect ammeter are given. The current in the circuit is measured in five different situations:
With and used in parallel combination.
The current obtained in the five cases are :
, and
but not necessarily in that order. Identify the currents in the five cases listed above and calculate and .


In the circuit shown in Fig. , each battery is of and has an internal resistance of . What will be the reading of an ideal voltmeter connected across a battery?


In the circuit shown in Fig. , the heat produced in resistor, due to the current flowing through it is calorie per second. Find the heat produced in resistor.
