Fill in the blanks with suitable words

1. Unit of power is _________ .

2. Unit of energy is _________ .

3. If a candle is burnt, the chemical energy is transformed into __________ .

4. The water stored in an overhead tank possesses _________ energy.

5. In a cinema theatre electrical energy is transformed into ________and__________ energy.

1. watt

The work done by the bulb is measured in joules and time in seconds. So, the unit of power is joules/second, which is equal to watt. So, the unit of power is watt.

2. joule

According to the definition of energy, it is the capacity to do work and work is measured in joules. So the unit of energy is joules.

3. heat and light energy

When a candle burns we can feel the heat around it and can see the light it gives out. So the chemical energy in the candle is transformed in the light as well as heat energy.

4. potential energy

The tank is placed at the height. Due to height, work is done by gravity to pull it downwards. So, the overhead tank possesses potential energy.

5. light and sound energy.

In a cinema theatre what we see is due to electrical energy transformed into light energy and due to sound energy, we can hear the dialogues.