Question on: JAMB Physics - 2014
A circuit has a resistance of 200Ω. The resistance of the circuit can be reduced to 120Ω when
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
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Correct Option: A
For parallel resistance,
\(\frac{300 \times 200}{500}\)
\(= 120 \Omega \)
Therefore it is when a 300Ω resistor is connected to it in parallel
\(\frac{300 \times 200}{500}\)
\(= 120 \Omega \)
Therefore it is when a 300Ω resistor is connected to it in parallel
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