In a Wheatstone bridge,all the four arms have | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The Wheatstone bridge is in a balanced condition because the ratio of resistances in the arms is equal $(R/R = R/R)$.In a balanced Wheatstone brid

Vedclass · Accepted Answer

$R$

Vedclass · Answer

(B) The Wheatstone bridge is in a balanced condition because the ratio of resistances in the arms is equal $(R/R = R/R)$.In a balanced Wheatstone bridge,no current flows through the galvanometer arm $(BD)$.Therefore,the galvanometer resistance $R$ can be ignored for the calculation of equivalent resistance.The circuit simplifies to two parallel branches connected between points $A$ and $C$.The upper branch consists of two resistors $R$ in series: $R_{AB} + R_{BC} = R + R = 2R$.The lower branch consists of two resistors $R$ in series: $R_{AD} + R_{CD} = R + R = 2R$.These two branches ($2R$ and $2R$) are in parallel.The equivalent resistance $R_{eq}$ is given by:$R_{eq} = \frac{(2R 	imes 2R)}{(2R + 2R)} = \frac{4R^2}{4R} = R$.

In a Wheatstone bridge,all the four arms have equal resistance $R$. If the resistance of the galvanometer arm is also $R$,the equivalent resistance of the combination as seen by the battery is

Similar Questions

In a Wheatstone bridge,$P = 9 \, \Omega$,$Q = 11 \, \Omega$,$R = 4 \, \Omega$,and $S = 6 \, \Omega$. How much resistance $r$ must be connected in parallel to the resistance $S$ to balance the bridge?

The value of $I$ in the figure shown below is: (in $\text{ A}$)

In the arrangement shown in the figure,the current through the $5\,\Omega$ resistor is ............. $A$.

The resistances in the Wheatstone bridge circuit shown in the diagram are all different,and the current through the galvanometer is zero. If all thermal effects are negligible,the current through the galvanometer will not be zero when:

Current measured by the ammeter $(A)$ in the given circuit when no current flows through the $10\,\Omega$ resistance is . . . . . . $A$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module