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Why an ammeter has low resistance while ...

Why an ammeter has low resistance while a voltmeter has high resistance?

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Why an ammeter should have as low resistance as possible?

What is the resistance of ideal ammeter.

One low resistance is connected in parallel to a high resistance. Show that their equivalent resistance is of the order of low resistance.

Why should a voltmeter have as large resistance as possible?

A galvanometer coil has a resistance of 10Omega and the meter shows full scale deflection for a current of 2.5 mA. How will you convery the metre into an ammeter of range 0 to 4A.

Show how you would connect three resistors, each of resistance 6Omega , so that combination has a resistance of 9Omega .

Show how you would connect three resistors, each of resistance 6Omega , so that combination has a resistance of 4Omega .

By mistake, a voltmeter is connected in series and an ammeter In parallel with a resistance in a circuit, What will happen to the instrument?

BINA LIBRARY-ELECTROMAGNETISM-EXERCISE
  1. Explain why two parallel wires carrying currents in opposite direction...

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  2. If two parallel conducting wires carry current in the same direction, ...

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  3. Why an ammeter has low resistance while a voltmeter has high resistanc...

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  4. Why is a voltmeter connected in parallel with a circuit?

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  5. Can a magnetic field increase the K.E. of a charged particle moving th...

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  6. By mistake, a voltmeter is connected in series and an ammeter In paral...

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  7. Under what condition does an electron moving through a magnetic field ...

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  8. A magnetic needle is placed on a cork floating on a lake in the northe...

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  9. A diamagnetic substance is placed in the middle between two magnetic p...

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  10. A small magnet is pivoted to move freely in the magnetic meridian. At ...

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  11. If a bar magnet is cut into two equal parts along the magnetic axis, t...

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  12. Explain why an unmagnetised piece of iron is attracted by a bar magnet...

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  13. Why should the material used for making permanent magnet have high coe...

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  14. "A soft iron core in solenoid acts as an electromagnet". Explain.

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  15. An infinitely long straight current carrying wire produces a magnetic ...

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  16. An infinitely long straight current carrying wire produces a magnetic ...

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  17. Find the force between two straight parallel wires, each of length one...

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  18. In a chamber , a uniform magnetic field of 6.5G(1G=10^−4T) is maintain...

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  19. A proton enters a uniform magnetic field of intensity 1.5 T in a direc...

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  20. A proton enters a magnetic field of flux density 1.5Wb/m^2 with a sp...

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