Practice Magnetic Force (4.2) - MOVING CHARGES AND MAGNETISM

Practise this section

8 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
Define magnetic field.
Show hintHide hint
It's measured in teslas.
Question 2.
What does the Lorentz force include?
Show hintHide hint
Think about the equation F = q(E + ...).
3Question 3.
What does the Lorentz force include?
- Only electric force
- Only magnetic force
- Both electric and magnetic forces
Show hintHide hint
Think of the full equation for the Lorentz force.
4Question 4.
True or False: A wire carrying current experiences less force if the magnetic field is parallel to the current.
- True
- False
Show hintHide hint
Consider the Lorentz equation carefully.
Question 5.
A charged particle with charge q and mass m moves at a velocity v perpendicular to a magnetic field B. What is the radius of the circular path described by the particle?
Show hintHide hint
Think about how the magnetic force acts as a centripetal force.
Question 6.
Consider a wire of length 1 meter carrying a current of 5A situated in a uniform magnetic field of 0.1T at an angle of 30 degrees. Calculate the magnetic force experienced by the wire.
Show hintHide hint
Break the force calculation into its components, considering the sine of the angle.

4 more questions in this section. Enroll free to practise them all.