English

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

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

Solution

A shows deflection but G does not.

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

Video TutorialsVIEW ALL [2]

RELATED QUESTIONS

Draw a labelled diagram of a moving coil galvanometer. Describe briefly its principle and working.


  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.)

Explain how moving coil galvanometer is converted into a voltmeter. Derive the necessary formula.


With the help of a neat and labelled diagram, explain the principle and working of a moving coil galvanometer ?


What are the advantages of using soft iron as a core, instead of steel, in the coils of galvanometers?


Why are the pole pieces of a horseshoe magnet in a moving coil galvanometer made cylinder in shape? 


A galvanometer coil has a resistance of 12 Ω and the metre shows full scale deflection for a current of 3 mA. How will you convert the metre into a voltmeter of range 0 to 18 V?


The coil of a moving coil galvanometer is wound over a metal frame in order to ______.


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


When a galvanometer is shunted with a 4 Ω resistance, the deflection is reduced to one-fifth. If the galvanometer is further shunted with a 2 Ω wire. The further reduction (find the ratio of decrease in current to the previous current) in the deflection will be (the main current remains the same)


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×