Electric Motor and Electromagnetism

Assessment

Electric Motor and Electromagnetism

ninja coder

Physics

Grade10

10 Plays

100 Participants

Worksheet

10 Qs

1.
Multiple Choice
1 pts•30 s
Describe the principle on which an electric motor operates.
Answer choices
Conversion of heat energy to mechanical energy
Force on a current-carrying conductor in a magnetic field
Generation of electric current by motion
Reflection of magnetic field lines
2.
Multiple Choice
1 pts•30 s
Identify the device in an electric motor that reverses the direction of current in the coil.
Answer choices
Armature
Commutator
Brushes
Magnet
3.
Multiple Choice
1 pts•30 s
Explain the role of electromagnetism in creating a magnetic field.
Answer choices
Current flow through a conductor produces a magnetic field
Voltage across a conductor produces a magnetic field
Heat in a conductor produces a magnetic field
Resistance in a conductor produces a magnetic field
4.
Multiple Choice
1 pts•30 s
Name the component of an electric motor that provides the magnetic field.
Answer choices
Commutator
Armature
Permanent magnet or electromagnet
Carbon brushes
5.
Multiple Choice
1 pts•30 s
Clarify the function of carbon brushes in an electric motor.
Answer choices
Generate magnetic field
Conduct current to the commutator
Rotate the armature
Insulate the coil
6.
Multiple Choice
1 pts•30 s
Indicate the rule used to determine the direction of force in an electric motor.
Answer choices
Right-Hand Thumb Rule
Fleming’s Left-Hand Rule
Fleming’s Right-Hand Rule
Ohm’s Law
7.
Multiple Choice
1 pts•30 s
Point out the part of an electric motor that rotates when current flows.
Answer choices
Magnet
Commutator
Armature
Brushes
8.
Multiple Choice
1 pts•30 s
State the effect of increasing the number of turns in the coil of an electromagnet.
Answer choices
Decreases magnetic field strength
Increases magnetic field strength
No effect on magnetic field
Reverses magnetic field direction
9.
Multiple Choice
1 pts•30 s
Describe a practical application of an electric motor.
Answer choices
Generating electricity
Powering a ceiling fan
Heating water
Charging a battery
10.
Multiple Choice
1 pts•30 s
Explain why a soft iron core is used in an electromagnet.
Answer choices
It conducts electricity better
It enhances the magnetic field strength
It reduces the weight of the electromagnet
It prevents current flow