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.)

The current flows through the insulator is 2 mA.

Explanation:

Given that,

Resistance

Voltage = 200 kV

We need to calculate the current

Using ohm's law

Where, I = current

V = voltage

R = resistance

Put the value into the formula

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

iron would move it is magnetic there is a mag field around the current in the wire

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west