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If a 5 ohm resistor is connected to a 10V battery, what is the energy consumed i
If a 5 ohm resistor is connected to a 10V battery, what is the energy consumed in 2 seconds?
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Practice Questions
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Q1
If a 5 ohm resistor is connected to a 10V battery, what is the energy consumed in 2 seconds?
10 J
20 J
5 J
15 J
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Power P = V^2 / R = 10^2 / 5 = 20 W. Energy = Power * time = 20 W * 2 s = 40 J.
Questions & Step-by-step Solutions
1 item
Q
Q: If a 5 ohm resistor is connected to a 10V battery, what is the energy consumed in 2 seconds?
Solution:
Power P = V^2 / R = 10^2 / 5 = 20 W. Energy = Power * time = 20 W * 2 s = 40 J.
Steps: 5
Show Steps
Step 1: Identify the values given in the problem. We have a resistor of 5 ohms and a battery of 10 volts.
Step 2: Use the formula for power (P) which is P = V^2 / R. Here, V is the voltage (10V) and R is the resistance (5 ohms).
Step 3: Calculate the power: P = 10^2 / 5 = 100 / 5 = 20 watts.
Step 4: Now, we need to find the energy consumed. Use the formula for energy which is Energy = Power * time.
Step 5: We know the power is 20 watts and the time is 2 seconds. So, Energy = 20 W * 2 s = 40 joules.
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