The resistance of a conductor wire is 10 MΩ. If a potential difference of 100 volts is applied across its ends, then find the value of current passing through it in mA. Ans. ( 0.01 mA)



Data Given:

Resistance = R = 10 MΩ = 10 ｘ10⁶ Ω   (∴ M = 10⁶)

Potential Difference (Voltage) = V = 100 V


To Find:


Current passing through the conductor ( in mA ) = I = ? 



Solution:


According to Ohm's Law

V = IR

I =`\frac{V}{R}`

by putting value

I = `\frac{100 V}{10 ｘ10⁶ Ω}`

I = 10 ｘ10⁻⁶ A

I = 10¹⁻⁶ A

I = 10⁻⁵ A

To convert the answer in mA we know that (∴ milli = m = 10⁻³) so, 

I = 10⁻²⁻³ A

I = 10⁻² ｘ10⁻³ A

I = 10⁻² mA

or

I = 0.01 mA  -----------------Ans

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