Understanding Magnetic Forces and Torque

What is the net force on a square loop with a current flowing clockwise in a uniform magnetic field pointing into the board?

• The net force is downward.

• The net force is upward.

• The net force is zero.

• The net force is to the right.

When the magnetic field is directed to the right, what is the net force on the loop?

• The net force is upward.

• The net force is downward.

• The net force is zero.

• The net force is to the left.

What happens when a wire loop is connected to a rod that can rotate?

• It increases the current.

• It stops the current.

• It generates a torque.

• It generates a net force.

Which condition results in maximum torque on a current-carrying loop?

• When the magnetic field is parallel to the loop.

• When the magnetic field is perpendicular to the loop.

• When the current is zero.

• When the loop is stationary.

What does the variable 'n' represent in the torque equation for a current-carrying loop?

• The area of the loop.

• The number of loops.

• The current in the loop.

• The magnetic field strength.

What happens to the torque if the number of turns in the loop is doubled?

• The torque is doubled.

• The torque is quadrupled.

• The torque remains the same.

• The torque is halved.

What is the angle 'Theta' in the torque equation?

• The angle between the loop and the magnetic field.

• The angle between the current and the loop.

• The angle between the loop and the ground.

• The angle between the magnetic field and the perpendicular to the loop.

What is the problem with a motor that rotates 180 degrees?

• The loop breaks.

• The current stops flowing.

• The torque reverses direction.

• The magnetic field disappears.

How can the problem of reversing torque in a motor be solved?

• By changing the direction of the current every 180 degrees.

• By increasing the current.

• By reducing the number of loops.

• By using a stronger magnetic field.

What is one method to change the direction of current in a motor?

• Using a direct current setup.

• Using an alternating current setup.

• Increasing the loop area.

• Decreasing the magnetic field.