Question 373: Current Electricity

Question

The Wheatstone bridge shown in figure, here, gets balanced when the carbon resistor used as R
1
has the colour code (Orange, Red, Brown). The resistors R
2
and R
4
are 80$\Omega $ and 40$\Omega $, respectively. Assuming that the colour code for the carbon resistors gives their accurate values, the colour code for the carbon resistor, used as R
3
, would be -
![](https://imagex.cdn.examgoal.net/ljsS62XMfYeW1Q5gJ/31YXbh5m0Ew2aWX1nRWTURIkUN3VA/6dTif0puwKN6ApYkUS64oM/image.png)

Accepted Answer

R
1
= 32 $ 	imes $ 10 = 320
for wheatstone bridge
$ \Rightarrow $  ${{{R_1}} \over {{R_3}}} = {{{R_2}} \over {{R_4}}}$
${{320} \over {{R_3}}} = {{80} \over {40}}$
${R_3} = 160$
$ 	herefore $  Correct answer is Brown  Blue  Brown

Answer

Brown, Blue, Brown

Answer

Grey, Black, Brown

Answer

Red, Green, Brown

Answer

Brown, Blue, Black

Current Electricity

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