Question

Calculate the electrical energy consumed in units when a 60 W bulb is used for 10 hours

• A. 1
• B. 0.6
• C. 0.3
• D. 2

Answer 1

The correct option is B 0.6

Power is energy consumed per unit time.

Here, energy consumed$=P=60W$ and time$=t=10hr=36000s$

$P=\frac{E}{t}$

$⟹E=Pt=60\times 36000J=3.6\times {10}^5\times 6J$

$1unit=3.6\times {10}^{6}J$

$⟹E=\frac{3.6\times 6\times {10}^5}{3.6\times {10}^6}$

$⟹E=0.6units$

Answer-(B)