Answer:
0N
Explanation:
When you draw a free body diagram, You have a 7N arrow pointing left, and a 3N arrow pointing right. When you subtract the two, you still have a force of 4N on the left. However, seeing as how gravity is in play at a force of 4N, the two forces cancel out and you get 0N.
An electric generator
An electric generator works in reverse of an electric motor.
Explanation:
In an electric generator the permanent magnet is span by a small piston engine powered by fuel. Which is why we put petrol/diesel in an electric generator. The crankshaft of the engine spins a permanent magnet surrounded by a coil of wires with many wounds. An electric current is induced in the coil of wire by dynamo effect - the more the wounds of the coil, the bigger the induced current This also observes the Fleming's rule of the thumb (right hand in this case) on electric induction.
Learn More:
For more on electric generators check out;
brainly.com/question/12285016
brainly.com/question/12524068
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I think the answer is kelvin,
hope is helps!