12.1) Power transmission lines are hung from metal towers on glass insulators. W

Question

12.1) Power transmission lines are hung from metal towers on glass insulators. What current flows through one insulator if it has a resistance of 1-0 x 10° ? and the line has a voltage of 2.0 x 105 V? How much current flows through a 2.4-0 headlight in a car swi 114 (1) The maximum safe ac current through a normal person is 5.0 mA. A repair technician touches the hot wire in an appliance opened for servicing and thereby comes into contact with 120 V. Will he receive a harmful shock (a) if his hands are wet and the resistance of the path through him to ground is 8,000 2? (b) if his skin is dry and he is wearing rubber-soled shoes giving a resistance nf 500.000 ? to ground?

Explanation / Answer

11.2 ) V = IR

I = V/R = 2*10^5 / 10^9

= 2*10^-4 A

11.3) I = V/R = 12 / 2.4 = 5 A

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