Question

An electric bulb of rating 50 W is used for 8 hours in one day. Find the number of units of energy used by the electric bulb.

A

200 unit

B

0.4 unit

C

0.6 unit

D

400 unit

Solution

The correct option is A 0.4 unit Given, power = 50 W = 0.05 kW So, energy consumed :  0.05 × 8 h = 0.4 kWh = 0.4 unit.

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