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A circuit has a resistance of 200Ω. The resistance of the circuit can be reduced ...


Question

A circuit has a resistance of 200Ω. The resistance of the circuit can be reduced to 120Ω when

Options

A)
A 300Ω resistor is connected to it in parallel
B)
An 80Ω resistor is conneceted to it in series
C)
A 150Ω resistor is connected to it in parallel
D)
A 240Ω resistor is connected to it in series

The correct answer is A.

Explanation:

For parallel resistance,

\(\frac{300 \times 200}{500}\)

\(= 120 \Omega \)

Therefore it is when a 300Ω resistor is connected to it in parallel


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