What is the power consumed by a 10 ohm resistor when a current of 2 A flows thro
Practice Questions
Q1
What is the power consumed by a 10 ohm resistor when a current of 2 A flows through it?
20 W
40 W
10 W
5 W
Questions & Step-by-Step Solutions
What is the power consumed by a 10 ohm resistor when a current of 2 A flows through it?
Correct Answer: 40 W
Step 1: Identify the values given in the problem. We have a resistor with a resistance of 10 ohms (Ω) and a current of 2 amperes (A) flowing through it.
Step 2: Recall the formula for power (P) consumed by a resistor, which is P = I^2 * R, where I is the current and R is the resistance.
Step 3: Substitute the values into the formula. Here, I = 2 A and R = 10 Ω.
Step 4: Calculate I^2. This means multiplying the current by itself: (2 A) * (2 A) = 4 A^2.
Step 5: Now multiply the result from Step 4 by the resistance. So, 4 A^2 * 10 Ω = 40 W.
Step 6: The final answer is that the power consumed by the resistor is 40 watts (W).
