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Questions and Answers
What is the formula to calculate torque?
What is the formula to calculate torque?
- R plus F
- R multiplied by F
- R divided by F
- R cross F (correct)
In an electric motor, what keeps the current-carrying loop rotating?
In an electric motor, what keeps the current-carrying loop rotating?
- Electric field
- Gravity
- Inertia
- Magnetic field (correct)
What happens when the loop in an electric motor is slightly moved from the equilibrium point?
What happens when the loop in an electric motor is slightly moved from the equilibrium point?
- It experiences forces pushing it back to equilibrium (correct)
- It speeds up
- It changes its color
- It stops moving
Which position results in unstable equilibrium for a loop in a magnetic field?
Which position results in unstable equilibrium for a loop in a magnetic field?
What is the torque of a current (I) times area (A) times magnetic field (B) known as?
What is the torque of a current (I) times area (A) times magnetic field (B) known as?
How does switching the direction of the current in an electric motor affect the loop?
How does switching the direction of the current in an electric motor affect the loop?
When is there no torque on a current-carrying wire in a magnetic field?
When is there no torque on a current-carrying wire in a magnetic field?
What causes a torque on a magnetic dipole?
What causes a torque on a magnetic dipole?
What is used in an electric motor to change the direction of forces acting on a current-carrying loop?
What is used in an electric motor to change the direction of forces acting on a current-carrying loop?
In which position is there stable equilibrium for a loop in a magnetic field?
In which position is there stable equilibrium for a loop in a magnetic field?
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