If a 5Ω resistor is connected to a 10V source, what is the power dissipated? (20

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Question: If a 5Ω resistor is connected to a 10V source, what is the power dissipated? (2023)

Options:

Correct Answer: 10W

Solution:

Power P = V²/R = (10V)² / 5Ω = 100 / 5 = 20W.

If a 5Ω resistor is connected to a 10V source, what is the power dissipated? (2023)

If a 5Ω resistor is connected to a 10V source, what is the power dissipated? (2023)

Step 1: Identify the values given in the problem. We have a resistor of 5 ohms (Ω) and a voltage source of 10 volts (V).
Step 2: Write down the formula for power (P) in terms of voltage (V) and resistance (R). The formula is P = V² / R.
Step 3: Substitute the values into the formula. Replace V with 10V and R with 5Ω: P = (10V)² / 5Ω.
Step 4: Calculate (10V)². This equals 100.
Step 5: Now divide 100 by 5Ω: 100 / 5 = 20.
Step 6: The result is 20 watts (W). This is the power dissipated by the resistor.

Ohm's Law and Power Calculation – Understanding the relationship between voltage, resistance, and power in electrical circuits.