Question

The magnitude of magnetic force acting on a current carrying conductor in a uniform magnetic field does not depend on

• A. electric current
• B. intensity of magnetic field
• C. length of the conductor
• D. direction of electric current

Hint:

Remember: The magnetic force depends on the current, the magnetic field strength, the length of the conductor, and the angle between them, but not the direction of the current itself.

Answer 1

The Correct Option is D

Step 1: Formula for magnetic force
The magnetic force \( F \) on a current-carrying conductor in a magnetic field is given by the formula: \[ F = BIL \sin \theta \] where:
- \( B \) is the magnetic field strength,
- \( I \) is the electric current,
- \( L \) is the length of the conductor, and
- \( \theta \) is the angle between the direction of the magnetic field and the direction of current.

Step 2: Analyzing the options
- The force depends on the electric current \( I \), the intensity of the magnetic field \( B \), and the length of the conductor \( L \).
- The force also depends on the angle \( \theta \), which indicates the direction of the electric current relative to the magnetic field. However, the magnitude of the force does not depend on the actual direction of the current, just the angle between the current and the magnetic field.

Step 3: Conclusion
Thus, the magnitude of the magnetic force does not depend on the direction of electric current.
\[ \boxed{\text{direction of electric current}} \]