Measurement and Instrumentation
The three resistors R1, R2 and R3 have the following ratings: R1 = 25Ω ± 4%, R2 = 65 Ω ± 4%; R3 =45 Ω ± 4%. If the resistance are connected in series, then limiting error produced in equivalent resistance is

 4%
 3%
 1%
 2%

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

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