- #1
jsmith613
- 614
- 0
Homework Statement
Q1: explain how the setup shown in the diagram acts as a break?
Q2: Electric and hybrid cars use regenerative breaking. At high speeds, the car can be slowed by reversing the direction of the electric motor so that it acts as a generator. Explain how this system operates in slowing down the car?
--------
Homework Equations
The Attempt at a Solution
Answer 1: The aluminium plate is a good conductor of electricity. As the plate passes through the uniform field, the amount of flux linking with the plate changes and hence an emf is induced. Because of the nature of the aluminium plate (conductor) a small current will flow. The direction of this induced current is such as to oppose the change creating it.
The current-carrying aluminium plate will produce its' own magnetic field that interacts with the external magnetic field. By flemmings LHR the force on the plate acts to the left and hence acts to decellerate the glider.
Is this correct?
Answer 2:
I am not entirely sure how this works so would be grateful if someone could help me along with my explanation. I will give it a go, though
From what I understand the induced current in the genetator opposes the current from the motor and acts as a break...I am very unsure though how to answer this question to gain the 3 marks assigned to it...
Thanks for your help :)