Practice Key Components of a Simple DC Motor - 5.5.3.1 | Module 5: Electricity and Magnetism | IB Board Grade 9 Physics
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5.5.3.1 - Key Components of a Simple DC Motor

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

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

πŸ’‘ Hint: Think about the parts that remain stationary while the rotor does the work.

Question 2

Easy

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

πŸ’‘ Hint: Consider which part needs to maintain electrical contact.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does the stator provide in a DC motor?

  • Magnetic field
  • Electrical energy
  • Mechanical energy

πŸ’‘ Hint: Think about the stationary part of the motor.

Question 2

True or False: The brushes are responsible for changing current direction in the motor.

  • True
  • False

πŸ’‘ Hint: Think about which part connects the electrical supply.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

A DC motor has a stator made of permanent magnets and a rotor with 200 turns of wire. If the supplied current doubles, discuss the effects on torque and speed of the motor.

πŸ’‘ Hint: Consider how torque relates to the interaction between magnetic fields in the rotor.

Question 2

Given a DC motor where the brushes have worn down and are not making proper contact, analyze how this will affect the motor's efficiency and possible failure modes.

πŸ’‘ Hint: Think about what happens when electricity cannot flow properly.

Challenge and get performance evaluation