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A line wire is hidden in a wall its posi...

A line wire is hidden in a wall its position can be located with the help of

A

watt-meter

B

moving coil galvanometer

C

magnetic needle

D

the position of the line wire cannot be located without breaking the wall

Text Solution

Verified by Experts

The correct Answer is:
C
A magnetic needle can be used to detect the line wire hidden inside the wall. As, due to the flow of the current, the magnetic field produced would give rise to the deflection in the magnetic needle.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-MAGNETIC EFFECT OF ELECTRIC CURRENT -I-EXERCISE 2 (MISCELLANEOUS PROBLEMS)
  1. A line wire is hidden in a wall its position can be located with the h...

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  2. Biot-Savart law indicates that the moving electrons (velocity vecv ) p...

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  3. A current flows in a conductor from east to west. The direction of the...

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  4. An equilateral triangle of side length l is formed from a piece of wir...

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  5. An infinitely long conductor is bent into a circle as shown in figure....

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  6. Magnetic field produced at the point O due to current flowing in as in...

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  7. Two long thin wires ABC and DEF are arranged as shown in the figure. T...

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  8. Three long, straight and parallel wires carrying currents are arranged...

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  9. A current of 10 ampere is flowing in a wire of length 1.5m. A force of...

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  10. Two infinitely long conductors carruying equal currents are shaped as ...

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  11. A 100 turns coil shown in figure carries a current of 2 A in a magneti...

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  12. A circular loop which is in the form of a major arc of a circle is kep...

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  13. Two circular coils 1 and 2 are made from the same wire but the radiu...

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  14. Some current i=2A is flgure. The frame is a combination of two equilat...

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  15. A conducting stick of length 2L and maas m is moving down a smooth inc...

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  16. A charge q is moving with a velocity v(1)=1hati m/s at a point in a ma...

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  17. The magnetic field existing in a region is gicen by vecB =B0(1+(x)/(l)...

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  18. A straight rod of mass m and length L is suspended from the identical ...

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  19. Figure here shows three cases, in all cases the circular path has radi...

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  20. A square coil of edge I having n turns carries a curent i. it is kept ...

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