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A voltmeter of resistance (2 x 10^4 Omeg...

A voltmeter of resistance `(2 x 10^4 Omega)` reads 5V. To make it read 20V, the extra resistance required is

A

`[4 x 10^4 Omega]` in parallel

B

`[6 x 10^4 Omega]` in parallel

C

`[4 x 10^4 Omega]` in series

D

`[6 x 10^4 Omega]` in series

Text Solution

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The correct Answer is:
A
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BINA LIBRARY-ELECTROMAGNETISM-EXERCISE
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  9. A galvanometer has a resistance of 25Omega and a maximum of 0.01A curr...

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  10. A voltmeter of resistance (2 x 10^4 Omega) reads 5V. To make it read 2...

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  11. A galvanometer of resistance 20Ω is to be converted into an ammeter of...

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  12. Two long parallel wires carry equal current I in the same direction. T...

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  13. An electric charge moves with a constant velocity v parallel to the li...

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  14. When a magnetic field is applied on an electron moving with uniform ve...

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  15. A stationary electron placed in a magnetic field experiences a mechani...

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  16. The force acting on an electron at rest in a uniform magnetic field B ...

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  17. A conducting circular loop of radius r carries a current I. It is plac...

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  18. Earth's magnetic field always has a horizontal component except at

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  19. Distinguish among paramagnetic , ferromagnetic and diamagnetic materia...

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  20. Demagnetisation of magnets is effected by

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