Question

A filament bulb rated at 30 W, coverts 15% of its electrical energy supply into light energy. Calculate the quantity of light energy emitted in 10 minutes.

a.

1.8 kJ

b.

1.2 kJ

c.

1.5 kJ

d.

2.4 kJ

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Answer: (a).1.8 kJ

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Q. A filament bulb rated at 30 W, coverts 15% of its electrical energy supply into light energy. Calculate the quantity of light energy emitted in 10 minutes.

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