The Wheatstone bridge shown in figure, here, gets balanced when the… | JEE Main 2019 (10 Jan, Shift 2)

Q66JEE Main 2019 · 10 JAN · SHIFT 2Medium

Wheatstone Bridge & Metre Bridge

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 -

Show answer and solution

Answer: (a)

Orange, Red, Brown $= 32 \times 10^1 = 320\ \Omega = R_1$
Balance: $\dfrac{R_1}{R_2} = \dfrac{R_3}{R_4} \Rightarrow R_3 = \dfrac{320 \times 40}{80} = 160\ \Omega$
$160 = 16 \times 10^1$ : Brown (1), Blue (6), Brown ( $\times 10$ )
So the answer is (a) Brown, Blue, Brown.

Report a mistake

More questions on Wheatstone Bridge & Metre Bridge

With a resistance of ' X ' in the left gap and resistance of 9 Ω in the right gap of a…MHT CET 2019 (2 May, Shift 2)
The metre bridge shown is in balance position with P/Q = (l₁)/(l₂). If we now interchange…NEET 2019
In a meter bridge experiment, the circuit diagram and the corresponding observation table…JEE Main 2019 (10 Apr, Shift 1)
In the experimental set up of metre bridge shown in the figure, the null point is…JEE Main 2019 (11 Jan, Shift 2)
In the network shown cell E has internal resistance r and the galvanometer shows zero…MHT CET 2019 (3 May, Shift 1)
In a meter bridge, the wire of length 1 m has a non-uniform cross-section such that, the…JEE Main 2019 (12 Jan, Shift 1)
On interchanging the resistances, the balance point of a meter bridge shifts to the left…JEE Main 2018
In a meter bridge, as shown in the figure, it is given that resistance Y = 12.5 Ω and…JEE Main 2018 (15 Apr, Shift 1)

Wheatstone Bridge & Metre Bridge question from JEE Main 2019 (10 Jan, Shift 2)

More questions on Wheatstone Bridge & Metre Bridge