A 12v Battery is connected to a bulb. The battery sends a current of 2.5 A through it. Calculate the power delivered to the bulb.

A 250V bulb passes a current of 0.3A. Calculate the power in the lamp.

When a 12V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

A solenoid is connected to a battery so that a steady current flows through it. If an iron core is inserted into the solenoid, will the current increase or decrease? Explain.

A current of 2 A flows through a 2 Omega resistor when connected across a battery. The same battery supplies a current of 0.5 A when connected across a 9 Omega resistor. The internal resistance of the battery is

An electric bulb is connected to a 220 V generator. The current is 0.50 A. What is the power of the bulb?

Two resistors of 1 k Omega and 200 Omega are connected in series with a 12V battery. Calculate the current flowing in the circuit and the voltage developed across the 200 Omega resistor.

Three resistors are connected in parallel with a 30V battery. A current of 7.5A flows through the circuit. If two out of the three resistors are of 10Omega and 12Omega , determine the resistance of the third resistor.

A 2V battery is connected across AB as shown in the figure. The value of the current supplied by the battery when in one case battery's positive terminal is connected to A and in other case when positive terminal of battery is connected to B will respectively be :-

A battery has e.m.f. 4 V and internal resistance r . When this battery is connected to an external resistance of 2 ohms , a current of 1 amp . flows in the circuit. How much current will flow if the terminals of the battery are connected directly

A 12pF capacitor is connected to a 50V battery. How much electrostatic energy is stored in the capacitor?