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Each of the batteries shown in figure ha...

Each of the batteries shown in figure has an emf equal to 5 V. Show that the magnetic field B at the point P is zero for any set of values of the resistances .

Text Solution

Verified by Experts

Net current in the circuit = 0
[from wheatstpone bridge principle]
Hence net magnetic field = 0.
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HC VERMA-MAGNETIC FIELD DUE TO CURRENT-exercise
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  2. A regular polygon of n sides is formed by bending a wire of total leng...

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  3. Each of the batteries shown in figure has an emf equal to 5 V. Show th...

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  4. A straight , long wire carries a current a current of 20A. Another wir...

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  5. Three coplanar parallel wires, each carrying a current of 10 A along t...

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  8. A long, straight wire is fixed horizontally and carries a current of 5...

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  13. A conducting circular loop of radius a is connected to two long, strai...

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  14. Two circular coils of radii 5.0 cm and 10 cm carry equal currents of 2...

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  15. Two circular coils of radii 5.0 cm and 10 cm carry equal currents of 2...

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  16. A circular loop of radius 20 cm carries a current of 10 A. An electron...

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  17. A circular loop of radius R carries a current I. Another circular loop...

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  18. A circular loop of radius r carrying a current i is held at the centre...

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  19. Find the magnetic field B due to a semicircular wire of radius 10.0 cm...

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