Measurement and Instrumentation
The resistance of a circuit is found by measuring current flowing and the power fed into the circuit. If the limiting errors in the measurement of power and current are ± 1.5% and ± 1.0% respectively, the limiting error in the measurement of resistance

 ± 2.5%
 ± 1.5%
 ± 3.5%
 ± 1%

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Measurement and Instrumentation
A resistance of 105 ohms is specified using significant figures as indicated below : 1. 105 ohms 2. 105.0 ohms 3. 0.000105 mega ohms Among these,

 1, 2 and 3 represent same precision.
 1 represents greater precision than 2 and 3.
 2 represents greater precision but 1 and 3 represent same precision.
 2 and 3 represent greater precision than 1.

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