Question

2. Determine the resistance of a coil connected to a 150Vsupplywhen a current of (a) 75Ma (b) 300μA flows through it.

Answer 1

Answer: 2* 10 ^-6 Ω and  5*10^5 Ω

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Explanation:

Potential difference (V) = 150 V

Case I

Current (I) = 75 MA = 75 * 10 ^6 A

So, Resistance (R) = V/I = 150 /75 * 10 ^6  = 2* 10 ^-6 Ω

Case II

Current (I) =  300μA = 300*10^-6 A

So, Resistance (R) = V/I = 150 /300*10^-6  = 5*10^5 Ω