The resistance of a circuit is measured from the relation R= P/I2, where P is the power fed into the circuit and I is the current flowing through it. If the limiting errors in the measurement of power and current are respectively ± 1.0% and ± 1.0%, then what will be the limiting error in measurement of resistance ?

• A.  ± 1.5%
• B.  ±0.5%
• C.  ±3.5%
• D.  ± 3.0%

Answer: (D)