Question

One Watt is equal to

• A. $1J-s$
• B. $1J-s^{-1}$
• C. $3.6\times {10}^{6}J-s^{-1}$
• D. $1000J-s^{-1}$

Answer 1

The correct option is B

$1J-s^{-1}$

Correct option is (B): $1J-s^{-1}$

Explanation:

1. Watt is the unit for measurement of power.
2. Power is the rate of doing work, which is given by, $P=\frac{Work}{time}$
3. Therefore, $1Watt=1J-s^{-1}$

Hence, the correct option is (B)