Name the method used to measure following resistances:- (i) Low resistance (ii) Medium resistance (iii) Insulation resistance (iv) Earth resistance.
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Following are the methods used to measure resistances:- 

(i) Low resistance: 1.Voltmeter-Ammeter Method 2. Kelvin’s Double bridge Method 

(ii) Medium resistance: 1.Voltmeter-Ammeter Method 2. Wheatstone’s Bridge Method 3. Substitution Method 

(iii) Insulation resistance: 1. Ohmmeter 2. Megger 3. Loss of Charge Method 

(iv) Earth resistance : 1. Fall of Potential Method 2. Earth tester

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