Iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. The other components of the circuit have their usual meanings. Choose the correct option from the following.

Magnetic field strength increases as the distance from the wire increases

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There is no change in the magnetic field strength

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Magnetic field strength decreases as the distance from the wire increases

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Magnetic field changes direction as the direction from the wire increases

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Solution

The correct option is C
Magnetic field strength decreases as the distance from the wire increases

Magnetic field strength decreases as the distance from the current carrying conductor (or magnet) increases. As magnetic field strength decreases the deflection of the compass decreases.

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Iron filings are sprinkled on a cardboard perpendicular to which a current carrying copper wire runs. The other components of the circuit have their usual meanings. Choose the correct option from the following.

The correct option is C Magnetic field strength decreases as the distance from the wire increasesMagnetic field strength decreases as the distance from the current carrying conductor (or magnet) increases. As magnetic field strength decreases the deflection of the compass decreases.

The correct option is C
Magnetic field strength decreases as the distance from the wire increases

Magnetic field strength decreases as the distance from the current carrying conductor (or magnet) increases. As magnetic field strength decreases the deflection of the compass decreases.