In the balanced condition, the values of the resistances of the four arms of a wheatstone bridge are shown in figure below. The resistance $R_{3}$ has temperature coefficient $α = K T ° C^{- 1}$ where $K = 0.0008$ and T is temperature in $° C$ . If the temperature of only $R_{3}$ is increased by $10 ° C$ , then [Take initial temperature $0 ° C$ ; Resistance of voltmeter V is very large]

see full answer

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

The voltage developed between C and D will be 0.5 volt at $T = 0^{0} C$

The voltage developed between C and D will be approx 0.47 volt at $T = 10^{0} C$

The voltage developed between C and D will be 0 volt at $T = 0^{0} C$

The voltage developed between C and D will be approx 0.27 volt at $T = 10^{0} C$

answer is A, C.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

$R_{3} = 300 (1 + .0008 \times 50) = 312 Δ V_{3} = \frac{50}{372} \times 312 - 50 \times \frac{5}{6} = 0.27 V$

Watch 3-min video & get full concept clarity