$What\; is\; the\; SI\; unit\; for\; power?$

• A. $\mathrm{Pascal}$
• B. $\mathrm{Joule}$
• C. $\mathrm{Watt}$
• D. $\mathrm{Newton}$

Answer: (C)

Verified step by step guidance

1. Understand that power is defined as the rate at which work is done or energy is transferred over time.
2. Recall the formula for power: \( P = \frac{W}{t} \), where \(P\) is power, \(W\) is work or energy, and \(t\) is time.
3. Recognize that the SI unit of work or energy is the joule (J), and the SI unit of time is the second (s).
4. Combine these units to express power in terms of joules per second: \( \text{Power unit} = \frac{\text{joule}}{\text{second}} \).
5. Know that the SI unit for power is named the watt (W), where 1 watt equals 1 joule per second.