Question

A power transmission line is hung from metal towers with glass insulators having a resistance of 1.00×109 Ω . What current flows through the insulator if the voltage is 200 kV? (Some high-voltage lines are DC.)

Answer 1

The current flows through the insulator is 2 mA.

Step-by-step explanation:

Given that,

Resistance
`R=1.00*10^(9)\ \Omega`

Voltage = 200 kV

We need to calculate the current

Using ohm's law

`V=IR`

`I=(V)/(R)`

Where, I = current

V = voltage

R = resistance

Put the value into the formula

`I=(200*10^(3))/(1.00*10^(9))`

`I=0.0002\ A`

`I=2\ mA`

Hence, The current flows through the insulator is 2 mA.