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A cheap voltmeter with resistance 500Ome...

A cheap voltmeter with resistance `500Omega` is used to measure the emf of a cell of internal resistance `4Omega`. What is the % error in the reading of the voltmeter?

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NN GHOSH-GALVANOMETERS: AMMETER AND VOLTMETERS-Exercise
  1. A cheap voltmeter with resistance 500Omega is used to measure the emf ...

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  2. A circular coil of radius 20 cm and 20 turns of wire is mounted vertic...

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  3. Calculate the current through a tangent galvanometer whose cells has 5...

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  4. A current is sent through two tangent galvenometers in series. The def...

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  5. Show that a tangent galvanometer is most sensitive when the deflection...

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  6. The total resistance of a simple circuit is 80 Omega including the res...

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  7. A tangent galvanometer of resistance 10Omega shows a deflection of 60^...

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  8. A circular loop of 50 turns and an area of 20 cm^(2) is placed in a ma...

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  9. A galvanometer coil of rectangular shape of length 4 cm and width 2 cm...

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  10. A moving coild galvanometer with a lamp-and-scale arrangement has a co...

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  11. In a moving coil galvanometer, the magnetic field used is 5T. The coil...

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  12. A milliammeter has a resistance of 10Omega and each division of its gr...

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  13. A moving coil galvanometer has a resistance of 200Omega and gives a fu...

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  14. A voltmeter with a resistance of 8000Omega is used to measure the emf ...

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  15. A cheap voltmeter with an internal resistance of 30Omega is connected ...

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  16. A voltmeter of range of 10 V and resistance 5000 Omega is connected in...

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  17. There is a milliameter, each division of which reads 1 mA. It has a re...

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  18. An ammeter of resistance 0.02 Omega is connected in the usual may to a...

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  19. A voltmeter of resistance 3000Omega can read up to 10 V. how would you...

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  20. A millimmater of resistance 20Omega reads up to 50 mA. Explain how the...

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  21. A battery of emf 5V and internal resistance 20Omega is connected to a ...

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