Question

*Solve the numericals*

1. Suppose a 6 volt battery is connected across a lamp whose resistance 20 ohm through a variable resistor. If the current in the circuit is 0.25 ampere, calculate the value of the resistance from the resistor which must be used?

2. An electric bulb is rated at 200volt-100W. what is its resistance? 5 Such bulb burn for 4 hours. What is the electrical energy consumed? Calculate the cost if the rate is 50 Paisa per unit.

3. A 6 V - 12 W lamp is connected in series with the source of 12 volt supply. Calculate the value of the resistance for the proper working of the lamp. what is the current flowing through the circuit??

4. 100 joules of heat is produced each second in a 4 ohm resistance. find the potential difference across the resistor.

5. A torch bulb of 3 V draws a current of 0.4 ampere. if the bulb is switched on for 5 minutes, calculate the energy released by the bulb.​

Answer 1

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