In a meter bridge, as shown in the figure, it is given that… | JEE Main 2018 (15 Apr, Shift 1)

Q74JEE Main 2018 · 15 APR · SHIFT 1Medium

Wheatstone Bridge & Metre Bridge

In a meter bridge, as shown in the figure, it is given that resistance $Y = 12.5\ \Omega$ and that the balance is obtained at a distance $39.5\text{ cm}$ from end $A$ (by Jockey J). After interchanging the resistances $X$ and $Y$ , a new balance point is found at a distance $l_2$ from end $A.$ What are the value of $X$ and $l_2$ ?

Show answer and solution

Answer: (a)

$\dfrac{X}{Y} = \dfrac{39.5}{60.5} \Rightarrow X = 12.5 \times \dfrac{39.5}{60.5} = 8.16\ \Omega$ .
After interchanging, the balance length from A becomes the old right length: $l_2 = 60.5\text{ cm}$ .
So the answer is (a) $8.16\ \Omega$ and $60.5\text{ cm}$ .

Report a mistake

More questions on Wheatstone Bridge & Metre Bridge

Which of the following statements is false?JEE Main 2017
In a meter bridge experiment resistances are connected as shown in the figure. Initially…JEE Main 2017 (9 Apr, Shift 1)
The resistances in the two arms of the meter bridge are 5 Ω and R Ω respectively. When…NEET 2014 (AIPMT)
In a metre bridge experiment null point is obtained at 40 cm from one end of the wire…JEE Main 2013 (9 Apr, Shift 1)
The resistances of the four arms P, Q, R and S in a Wheatstone's bridge are 10 ohm, 30…NEET 2013
In the circuit shown the cells A and B have negligible resistances. For VA = 12 V, R1 =…NEET 2012 (AIPMT, Prelims)
Shown in the figure below is a meter-bridge set up with null deflection in the…JEE Main 2008 (AIEEE)
Three resistances, P, Q, R each of 2 Ω and an unknown resistance S from the four arms of…NEET 2007 (AIPMT)

Wheatstone Bridge & Metre Bridge question from JEE Main 2018 (15 Apr, Shift 1)

More questions on Wheatstone Bridge & Metre Bridge