QuestionS plz help... (1 Viewer)

[risaka]

1. Contrast the operation of a galvometer with that of a simple generator.

2. How does electromagnetic braking and induction cooktop work? (in a easy-to-understand version)

3. Why can't a tranformer be used to do the same thing for DC voltages?

can someone please help me with the above questions?
much appreciate it -3-

 

[helper]

1. Contrast the operation of a galvometer with that of a simple generator.

A galvanometer is an example of the motor effect turning electricity into KE, while a generator is an example of an induced current, turning KE into electricity.
So they have the opposite function

2. How does electromagnetic braking

When electromagnet is turned on, eddy currents are produced in the brake that in turen produce an opposing force to slow the object down (Application of Lenz's Law)

and induction cooktop work? (in a easy-to-understand version)

An AC current under the cooktop surface induces eddy currents in the saucepan. Due to the electric resistance of the saucepan, these eddy currents are converted into heat energy.

3. Why can't a tranformer be used to do the same thing for DC voltages?

Being technical they can but not as easily or as effectively as AC because there isn't a changing magnetic flux with a flat DC current or a smaller change in flux with a traditional DC generated current.

To have a change in flux your current has to change with time.