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  • Help me solve this - The Wheatstone bridge shown in the figure here, get balance when the carbon resistor used as R1 has - Current Electricity - JEE Main

The Wheatstone bridge shown in the figure here, get balance when the carbon resistor used as R1 has the colour code (Orange, Red, Brown) The resistor R2 and R4 are 80\Omega and 40\Omega, respectively.

Assume that the colour code for the carbon resistor, used as R3 ,would be :

 

  • Option 1)

    Brown, Blue, Brown

  • Option 2)

    Brown, Blue, Black

  • Option 3)

    Red, Green, Brown

  • Option 4)

    Grey, Black, Brown

Answers (1)

best_answer

 

Colour coding of a Resistance -

The carbon resistance has normally four coloured rings bands A,B,C and D .

- wherein

 

 

Wheat stone Bridge -

It is an arrangement of four resistances which can be used to measure one of them in terms of rest

- wherein

R1 = 32 X 10 = 320

\frac{R_{1}}{R_{3}} = \frac{R_{2}}{R_{4}}

R3 = 160

where 1 - brown

          6 - blue

          0 - brown

 


Option 1)

Brown, Blue, Brown

Option 2)

Brown, Blue, Black

Option 3)

Red, Green, Brown

Option 4)

Grey, Black, Brown

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