A 5 ohm resistor is connected in series with a variable resistor. The maximum power is transferred when variable resistor is
Q1. A 5 ohm resistor is connected in series with a variable resistor. The maximum power is transferred when variable resistor is
Answer: 5 ohm
Explanation: For maximum power transfer, the internal resistance (5 ohm) should equal the external resistance, hence variable resistor = 5 ohm