Electrical Energy and Joules Law MCQ (Multiple Choice Questions) PDF Download

An energy saver light bulb that uses 11J of electrical energy gives the same amount of light as an ordinary bulb that uses

1. 60 J
2. 50 J
3. 30 J
4. 22 J

The amount of heat generated in resistance due to the flow of charges is equal to the product of the square of current, resistance and the time duration. This statement is known as

1. Ohm's law
2. Joule's law
3. Newton's law
4. Pascal's law

If a current of 0.8 A passes through a bulb connected across a battery of 5V for 30 s, then the rate of energy transferred to the bulb is

1. 30 J
2. 60 J
3. 120 J
4. 20 J

The rate of energy transferred if a current of 0.5 A passes through a bulb connected across a battery of 6 V for 20 s is

1. 80 J
2. 20 J
3. 30 J
4. 60 J

The process during which charges continuously move from a higher potential to a lower potential becomes a continuous source of

1. heat energy
2. light energy
3. chemical energy
4. electrical energy