English

The figure below shows a circuit containing an ammeter A, a galvanometer G and a plug key K. When the key is closed:

Advertisements
Advertisements

Question

The figure below shows a circuit containing an ammeter A, a galvanometer G and a plug key K. When the key is closed:

Options

  • both G and A show deflections.

  • neither G nor A shows deflection.

  • G shows deflection but A does not.

  • A shows deflection but G does not.

MCQ
Advertisements

Solution

A shows deflection but G does not.

shaalaa.com
  Is there an error in this question or solution?
2024-2025 (March) Specimen Paper

Video TutorialsVIEW ALL [2]

RELATED QUESTIONS

A circular coil of 250 turns and diameter 18 cm carries a current of 12A. What is the magnitude of magnetic moment associated with the coil?


  1. A circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of 60° with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning.
  2. Would your answer change, if the circular coil in (a) were replaced by a planar coil of some irregular shape that encloses the same area? (All other particulars are also unaltered.)

A rectangular coil of a moving coil galvanometer contains 100 turns, each having area
15 cm2. It is suspended in the radial magnetic field 0.03 T. The twist constant of suspension
fibre is 15 x 10-10 N-m/degree. Calculate the sensitivity of the moving coil galvanometer.


Why does a galvanometer when connected in series with a capacitor show a momentary deflection, when it is being charged or discharged?

How does this observation lead to modifying the Ampere's circuital law?

Hence write the generalised expression of Ampere's law.


Define the current sensitivity of a galvanometer ?


State the principle of the working of a moving coil galvanometer, giving its labeled diagram ?


State the underlying principle of working of a moving coil galvanometer. Write two reasons why a galvanometer can not be used as such to measure current in a given circuit. Name any two factors on which the current sensitivity of a galvanometer depends.


A multirange current meter can be constructed by using a galvanometer circuit as shown in figure. We want a current meter that can measure 10 mA, 100 mA and 1A using a galvanometer of resistance 10 Ω and that prduces maximum deflection for current of 1mA. Find S1, S2 and S3 that have to be used


A moving coil galvanometer has 150 equal divisions. Its current sensitivity is 10-divisions per milliampere and voltage sensitivity is 2 divisions per millivolt. In order that each division reads 1 volt, the resistance in ohms needed to be connected in series with the coil will be ______.


An ammeter, ideally, has:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×