First slide

Colour code

Question

A carbon resistor has colour strips as orange, red brown and red. The resistance is

Easy

A

$318 Ω$
B

$741 Ω$
C

$704 Ω$
D

$407 Ω$

Solution

Using standard colour codes
Orange = 3, red = 2, brown = 1 and red = 2 % (tolerance)
$S o R = 32 \times 10^{1} \pm 2 % = 320 \pm 2 %$
So its value will be nearest to $318 Ω$

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