Mechatronics I DC & Stepper Motors Quiz

Which is not a main component of a DC motor?

• Stator

• Rotor

• Commutator

• Bearing Cap

What is the function of the commutator in a DC motor?

• To attach to the motor shaft

• To connect the motor power supply to the brushes

• To support the motor bearings

• To cool the windings

How do magnets inside the motor contribute to its operation?

• By producing an electric current

• By generating a permanent magnetic field

• By rotating the shaft

• By controlling the timing of the coils

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NGSS.MS-PS2-3

Why are windings wrapped into a coil in a DC motor?

• To reduce the size of the motor

• To increase motor inertia

• To reduce motor heat

• To create a stronger magnetic field

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

How does the number of coil sets impact the rotation of a DC motor?

• More coil sets make the motor rotation smoother

• More coil sets make the motor run cooler

• More coil sets lead to stronger magnetic field

• More coil sets cause the motor to run faster

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which hand rule is mentioned to determine the direction of the forces in a DC motor?

• Faraday's Rule

• Maxwell's Rule

• Lenz's Rule

• Fleming's Rule

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NGSS.HS-PS2-5

How does reversing the power supply affect the rotation of a DC motor?

• It causes to the motor to stall

• It cause the motor to run in reverse

• It causes the motor to damage itself

• It causes the motor to run hotter

What does PWM stand for in the context of electrical signals?

• Pulse Wave Modulation

• Power Width Modulation

• Point Width Modulation

• Pulse Width Modulation

Which component is commonly used for fast switching in PWM circuits?

• Resistors

• Capacitors

• Transistors

• Diodes

What is the duty cycle of a PWM wave?

• The rate at which the signal switches on and off

• The percentage for which the signal remains in the on state in one cycle

• The frequency of the switching process

• The total duration of a PWM cycle