Physics
Grade-10
Easy
Question
A vertically placed straight conductor carries a current vertically upwards. A point P lies to the east of it at a small distance and another point Q lies to the west at the same distance. The magnetic field at P is:
- Less than at Q
- Same as at Q
- Greater than at Q
- Greater or less than at Q depending upon the strength of the current
Hint:
A vertically placed straight conductor carries a current vertically upwards. Point P lies to the east of it at a small distance and point Q lies to the west at the same distance. The magnetic field at P is the same as that of Q.
The correct answer is: Same as at Q
- The magnetic field at a point in a current-carrying conductor is inversely proportional to the square of the distance from the conductor carrying the current, according to Biot-Savart law.
- Therefore, regardless of the distance from the conductor, the magnetic field's strength is the same for points P and Q.
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