Physics
Grade-10
Easy
Question
The magnetic field around a straight current-carrying wire is independent of:
- Distance from the wire
- Current in the wire
- Direction of the flow of current
- Mass of the wire
Hint:
The magnetic field around a straight current-carrying wire is independent of the mass of the wire.
The correct answer is: Mass of the wire
- The magnetic field in a current-carrying conductor depends on the distance and frequency of the current.
- According to the Biot-Savart rule, the magnetic field at a point p is given by B =μo/4π * ∫Idl*r(vector)/r3, where r is the distance between the point p and the conductor and I is the current flowing through it. Therefore, the magnetic field produced by a conductor carrying current is dependent on both the conductor's proximity to and the current flowing through it.
- The mass of the wire does not create any impact on the magnetic field.
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