Question

The energy consumed in 1 kilowatt electric heater in 30 seconds will be

• A. $6 \times 10^{2}J$
• B. $4.99 \times 10^{7}J$
• C. $9.8 \times 10^{6}J$
• D. $3 \times 10^{4}J$

Answer 1

Answer: (D)

$3 \times 10^{4}J$

Answer 2

E = P × t $= 1000W \times 30sec = 3 \times 10^{4}J$