2134571
Description
Flashcards by zhoriif2481, updated more than 1 year ago
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Created by zhoriif2481
about 9 years ago
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| Question | Answer |
| Why are split rings used in a motor? | 1. Turn continuously 2. Keep spinning in one direction |
| Why do we use the F.L.H. Rule? | To figure out where either Force, Magnetic Field Direction, or Current is facing. Remember by: F.B.I. |
| What does Lenz's law state? | 1. A current is induced in a closed conducting loop, only when the magnetic flux, in the loop, changes. 2. Direction of induced current is such that the induced magnetic field always opposes the change in flux. |
| What is the deflection of the galvanometer when: a) A magnet enters the solenoid north pole facing the solenoid? b) A magnet leaves the solenoid north pole facing the solenoid? c) A magnet leaves the solenoid south pole facing the solenoid? | a) Positive b) Negative c) Negative |
| List three ways you would increase the speed of a motor? | 1. Increase the strength of the magnetic field 2. Increase the number of coils in the loop 3. Increase the current flowing |
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