An unknown resistance is connected in parallel with a `15Omega` resistance and a 12 V battery. What is the value of the unknown resistance if the current in the circuit is 2A?

A parallel combination of an 8 Omega resistor and an unknown resistor R is connected in series with a 16 Omega resistor and a battery. This circuit is then disassembled, and the three resistors are then connected in series with each other oand the same battery. in both arrangements, the current through the 8 Omega resistor is the same. What is the unknown resistance R?

A parallel combination of an 8 Omega resistor and an unknown resistor R is connected in series with a 16 Omega resistor and a battery. This circuit is then disassembled, and the three resistors are then connected in series with each other oand the same battery. in both arrangements, the current through the 8 Omega resistor is the same. What is the unknown resistance R?

A bulb with rating 100 V, 500 W is to be connected in series with an unknown resistance and a battery of 200 volts. What must be the value of this unknown resistance such that the bulb still dissipates 500W.

A 10 V battery of negilgible internal resistance is connected across a 200V battery and a resistance of 38 Omega as shown in figure. . Find the value of current in the circuit.

A resistor is connected to a battery of emf 10 V and internal resistance 0.3 Omega . What is the resistance of the resistor to be inserted in the circuit for the circuit current 1.2A?