Question

Find the potential difference required to flow a current of 200ma in a wire of resistance 20ohm

Answer 1

Answer:

Potential Difference (V) = 4 Volt

Explanation:

Given: Electric current (I) = 200mA

Resistance (R) = 20 ohm

To find: Potential Difference (V)

Solution: I = 200mA

I = (200/1000)A

I = (1/5)A

By Ohm's Law

V = IR

V = (1/5) x 20

V = 4 Volt

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Answer 2

Answer:

Potential difference (V) = 4 Volts

Step - by - step explaination :

Electric current (I) = 200 mA

& Resistance (R) = 20 Ω

We have to find out potential difference (V)

We know that

By Ohm’s law:

V = IR

V = 200mA × 20Ω

V = 4000 m-Volts

We know that 1 m-Volts =1/1000 Volts

؞ 4000m-Volts =4000/1= 4 volt                                                      

Therefore Potential difference(V) required is 4 Volts.