Explain the construction of a meter bridge used in the laboratory.
(N/A) meter bridge consists of a wire of uniform cross-section and uniform resistivity with a length of $1 \ m$. This wire is stretched between two thick copper strips fixed on a wooden board.
The copper strips are $L$-shaped at the ends,providing terminals for connections. There is a central straight copper strip that provides a gap for connecting a galvanometer.
$A$ meter scale is fixed parallel to the wire to measure the balancing length.
$A$ battery,a key $(K_1)$,and a rheostat are connected in series between the two ends $A$ and $C$ of the wire to maintain a steady current.
$A$ galvanometer $(G)$ is connected between the central terminal $B$ and a jockey. The jockey can be moved along the wire to find the null point $D$ where the galvanometer shows zero deflection.
The copper strips are $L$-shaped at the ends,providing terminals for connections. There is a central straight copper strip that provides a gap for connecting a galvanometer.
$A$ meter scale is fixed parallel to the wire to measure the balancing length.
$A$ battery,a key $(K_1)$,and a rheostat are connected in series between the two ends $A$ and $C$ of the wire to maintain a steady current.
$A$ galvanometer $(G)$ is connected between the central terminal $B$ and a jockey. The jockey can be moved along the wire to find the null point $D$ where the galvanometer shows zero deflection.
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Similar Questions
In a meter bridge experiment to determine the value of an unknown resistance,first the resistances $2 \Omega$ and $3 \Omega$ are connected in the left and right gaps of the bridge and the null point is obtained at a distance $l \ cm$ from the left. Now when an unknown resistance $x \ \Omega$ is connected in parallel to $3 \ \Omega$ resistance,the null point is shifted by $10 \ cm$ to the right of the wire. The value of unknown resistance $x$ is . . . . . . $\Omega$.
DifficultJEE MAIN 2026
View SolutionTwo resistors $2 \Omega$ and $3 \Omega$ are connected in the gaps of a meter bridge as shown in the figure. The null point is obtained with the contact of the jockey at some point on the wire $XY$. When an unknown resistor $R$ is connected in parallel with the $3 \Omega$ resistor,the null point is shifted by $22.5 \text{ cm}$ toward $Y$. The resistance of the unknown resistor $R$ is . . . . . . $\Omega$.
During an experiment with a meter bridge,the galvanometer shows a null point when the jockey is pressed at $40.0 \ cm$ using a standard resistance of $90 \ \Omega$,as shown in the figure. The least count of the scale used in the meter bridge is $1 \ mm$. The unknown resistance is:
$STATEMENT-1$: In a Meter Bridge experiment,a null point for an unknown resistance is measured. Now,the unknown resistance is placed inside an enclosure maintained at a higher temperature. The null point can be obtained at the same point as before by decreasing the value of the standard resistance.
$STATEMENT-2$: The resistance of a metal increases with an increase in temperature.
$STATEMENT-2$: The resistance of a metal increases with an increase in temperature.
In the meter bridge experiment,for given values of $R_1$ and $R_2$,the balance point is $20 \ cm$ from point $A$. When $R_2$ is shunted by a $20 \ \Omega$ resistance,the balancing point shifts to $50 \ cm$ from point $A$. Find the value of $R_2$ in $\Omega$.
Medium
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