Electromagnetic Induction
What is the primary cause of magnetic forces on conductors?
Static electric charges within the conductor.
Induced currents flowing in the conductor within a magnetic field.
The conductor's inherent magnetic properties, regardless of current.
External electric fields interacting with the conductor.
A straight wire of length carries a current in a uniform magnetic field . If the wire is oriented perpendicular to the magnetic field, what is the magnitude of the magnetic force on the wire?
0
A non-uniformly distributed current flows along a wire of length placed along the x-axis in a uniform magnetic field . What is the magnitude of the magnetic force on the wire?
2kLB
A conducting loop is partially immersed in a magnetic field. Which of the following factors does NOT affect the force on the loop?
The induced current in the loop.
The loop resistance.
The loop velocity relative to the magnetic field.
The color of the conducting loop.
How does increasing the number of turns in a conductive loop affect the induced current and magnetic force, assuming all other factors remain constant?
It decreases both the induced current and the magnetic force.
It increases both the induced current and the magnetic force.
It increases the induced current but decreases the magnetic force.
It decreases the induced current but increases the magnetic force.
What is the effect of increasing the external magnetic field strength on the induced current and force on a conducting loop?
Decreases both the induced current and the force.
Increases the induced current but decreases the force.
Decreases the induced current but increases the force.
Increases both the induced current and the force.
When does maximum induced current and force occur in a loop relative to the magnetic field lines?
When the loop is parallel to the magnetic field lines.
When the loop is perpendicular to the magnetic field lines.
When the loop is at a 45-degree angle to the magnetic field lines.
The angle does not affect the induced current and force.

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A square loop with side length is placed in a magnetic field at an angle of 30^{\circ}
relative to the field. If the current in the loop is , what is the magnitude of the magnetic force on the loop?
0.1 \text{ N}
1 \text{ N}
0.5 \text{ N}
0.2 \text{ N}
A conducting loop with mass is placed in a magnetic field. If the net magnetic force on the loop is and there are no other forces acting on it, what is the acceleration of the loop?
A conducting loop of mass and resistance is dropped into a magnetic field . The loop experiences a magnetic force opposing its motion. Given an initial velocity , derive an expression for the velocity of the loop as a function of time, assuming the magnetic force is constant.