Electric Motor Quiz

What device is used to change the direction of the current every half turn in an electric motor?

• Capacitor

• Resistor

• Transformer

• Split ring commutator

What happens if the direction of the current is not changed in an electric motor every half turn?

• The motor will rotate in the opposite direction

• The motor will stop working

• The motor will overheat

• The motor will explode

How can the speed of rotations in an electric motor be increased?

• Reduce the number of turns in the coil

• Increase the number of coils

• Decrease the current passing through the wire

• Use weaker magnets

What is the purpose of a split ring commutator in an electric motor?

• To increase the resistance in the circuit

• To change the voltage of the current

• To change the direction of the current every half turn

• To store electrical energy

In which direction will a coil rotate if the left side experiences an upwards force and the right side experiences a downward force?

• Random direction

• No rotation

• Anti-clockwise

• Clockwise

What is the name of the concept where we can create a spinning motion using electricity?

• Electric rotation

• Magnetic spinning

• Motor effect

• Electric revolution

What are some common applications of motors that use the concept of creating spinning motion using electricity?

• Fans and vehicles

• Refrigerators and ovens

• Light bulbs and power sockets

• Computers and smartphones

What is the role of the brushes in an electric motor?

• To increase the magnetic field

• To provide a path for current to flow from the power source to the split ring commutator

• To store electrical energy

• To reduce the resistance in the circuit

What will happen if the magnetic field in an electric motor is increased?

• The motor will stop working

• The motor will rotate in the opposite direction

• The speed of rotations in the motor will increase

• The motor will overheat

What is the effect of increasing the number of turns in the coil of an electric motor?

• The motor will explode

• The speed of rotations in the motor will decrease

• The motor will stop working

• The speed of rotations in the motor will increase