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What is a galvanometer ?...

What is a galvanometer ?

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A galvanometer is an instrument used to detec the presence of an electric current in a circuit.
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What is Galvanometer ? Give application of it.

In the circuit the current is to be measured. What is the value of the current if the ammeter shown (a) is a galvanometer with a resistance R_G = 60.00 Omega , (b) is a galvanometer described in (a) but converted to an ammeter by a shunt resistance r_s= 0.02 Omega , (c ) is an ideal ammeter with zero resistance?

Why small soft iron cylinder is placed at the axis of the coil in galvanometer ?

What is current sensitivity of galvanometer ? How it can be increase ?

When a galvanometer shunt of 4Omega is attahced to a galvanometer, the deflection reduces to (1)/(5) th. If an additional shunt of 2Omega is attached. What will be the deflection?

What is the value of resistance to double the value of number of turns of coil for galvanometer ? Why?

When a galvanometer with a shunt is joined in an electrical circuit 2% of the total current passes through the galvanometer. Resistance of galvanometer is G. Find the value of shunt.

A gavanometer of 50 Omega resistance has 25 divisions. A current of 4xx10^(-4) A gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 V , it should be connected with a resistance of

A coil with resistance 8 Omega and having 8 turns is connected with a galvanometer having resistance 8 times the resistance of coil. In 4 ms, if magnetic flux linked with this loop changes from 12xx10^(-5) Wb to 18xx10^(-5) Wb then current induced in the loop will be ......

A coil having n turns and resistance R Omega is connected with a galvanometer of resistance 4 R Omega . This combination is moved in time t seconds from a magnetic field W_1 Weber to W^2 Weber. The induced current in the circuit is ____

KUMAR PRAKASHAN-MAGNETIC EFFECTS OF ELECTRIC CURRENT -ANSWER THE FOLLOWING QUESTIONS IN VERY SHORT AS DIRECTED (MISCELLANEOUS):
  1. How does the current in a domestic circuit differ from that used to...

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  2. State what would happen to the direction of rotation of the cell curr...

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  3. State the use of Maxwell.s corckscrew rule .

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  4. What type of dynamo (a machine for changing other power into electric...

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  5. Give one reason for not using a series arrangement for domestic circ...

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  6. What does the following symbol indicate/represent?

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  7. What is the function of the brushes in an AC generator ?

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  8. What determined the frequency of AC produced by a generator ?

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  9. What is the role of each of the three pins in a power plug ?

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  10. State two serious hazards of electricity .

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  11. Name an instrument used in navigation.

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  12. What is the effect the resistance in the circuit at the time of short...

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  13. Name the current -carrying conductor , whose magnetic field is re...

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  14. What is a commutator ?

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  15. In an electric motor , which of the following remains fixed and w...

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  16. What change should be made in an AC generator , so that it may becom...

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  17. If fuses of 250 mA, 5A and 10 A were available , which one would be...

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  18. What is a galvanometer ?

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  19. What are the two most commonly used domestic circuits ?

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  20. What do you mean by earthing ?

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