Question 299: Current Electricity

Question

The Wheatstone bridge shown in figure, here, gets balanced when the carbon resistor used as R1 has the colour code (Orange, Red, Brown). The resistors R2 and R4 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 R3, would be -

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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