Explain the construction of meter bridge.

A meter bridge has a straight and uniform wire of materials such as Manganin.

  • The wire is of one-meter length and is stretched along the side of a meter scale AC.
  • The ends of the wire are attached to thick copper strips of L shape with negligible resistance at A and C.
  • The L-shaped copper stripes and the wire are mounted on a wooden base horizontally.
  • Between the two L-shaped copper strips, another thick copper strip D having negligible resistance is fixed in a way that two gaps are formed. 

Meter Bridge

In the AD gap, a resistance R is connected whose value is to be measured. In the CD gap, a resistance box S is connected. To complete the Wheatstone bridge, resistances P and Q are formed by dividing the meter bridge wire into parts using a jockey which changes P and Q continuously.


Related Questions

  1. Can you find very high resistance accurately with the help of a Metre bridge?
  2. Why Carey Foster Bridge Is So Sensitive?
  3. Meter Bridge or Slide Wire Bridge is a practical form of?
  4. Meter bridge works on the principle of?
  5. Why should we get the null point in the middle of the Metre bridge wire?
  6. How does a bridge circuit work?
  7. How do you solve an unbalanced bridge?
  8. Why is Wheatstone's bridge more accurate?
  9. What Is Null Voltage?

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CBSE CLASS XII Related Questions

  • 1.
    Four independent waves are expressed as \[ (i)\; y_1=A_1\sin\omega t, \] \[ (ii)\; y_2=A_2\sin 2\omega t, \] \[ (iii)\; y_3=A_3\cos\omega t, \] \[ (iv)\; y_4=A_4\sin\left(\omega t+\frac{\pi}{3}\right) \] The interference between two of these waves is possible in

      • (i) and (iii) only
      • (iii) and (iv) only
      • (i), (iii) and (iv) only
      • All of them

    • 2.
      The figure shows three point charges kept at the vertices of triangle ABC. The net electric field, due to this system of charges, at the midpoint M of base BC will be:

        • \( \frac{q}{4 \pi \epsilon_0 l^2} \) pointing along MA
        • \( \frac{q}{\pi \epsilon_0 l^2} \) pointing along AM
        • \( \frac{q}{2 \pi \epsilon_0 l^2} \) pointing along AM
        • Zero

      • 3.
        Assertion (A) : The mass of a nucleus is less than the sum of the masses of the constituent nucleons. Reason (R) : Energy is absorbed when the nucleons are bound together to form a nucleus.

          • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
          • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
          • Assertion (A) is true, but Reason (R) is false.
          • Both Assertion (A) and Reason (R) are false.

        • 4.
          Assertion (A) : All atoms have a net magnetic moment. Reason (R) : A current loop does not always behave as a magnetic dipole.

            • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
            • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
            • Assertion (A) is true, but Reason (R) is false.
            • Both Assertion (A) and Reason (R) are false.

          • 5.
            Two heaters rated as \((P_1,V)\) and \((P_2,V)\) are connected in series across a dc source of \(V/2\) volt. The power consumed by the combination will be –

              • \((P_1+P_2)\)
              • \(\dfrac{P_1+P_2}{2}\)
              • \(\dfrac{P_1P_2}{2(P_1+P_2)}\)
              • \(\dfrac{P_1P_2}{4(P_1+P_2)}\)

            • 6.
              Two small identical metallic balls having charges \( q \) and \( -2q \) are kept far at a separation \( r \). They are brought in contact and then separated at distance \( \frac{r}{2} \). Compared to the initial force \( F \), they will now:

                • attract with a force \( \frac{F}{2} \)
                • repel with a force \( \frac{F}{2} \)
                • repel with a force \( F \)
                • attract with a force \( F \)
              CBSE CLASS XII Previous Year Papers

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