# Multiples and sub-multiples, abbreviations and indices

### Explanation of question 9

A resistor of resistance value 10k is connected across a 10V supply. The current through the resistor will be

1. 1 x 10-6 A
2. 1 x 10-3 A
3. 1 x 103 A
4. 1 x 106 A

The answer is :- 2

I = V / R

= 10
10 x 103

= 1
10-3

= 1 x 10-3 A or 1 mA.

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