# Multiples and sub-multiples, abbreviations and indices

### Explanation of question 12

A 12k resistor has a p.d. of 24mV applied across its terminals. The current through the resistor will be

1. 0.5mA
2. 0.5 A
3. 2 mA
4. 2 A

The answer is :- 4

I =

= 24 x 10-3
12 x 103

= 2 x 10-3
103

= 2 x 10-3 x 10-3

= 2 x 10-6 A

= 2A

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