GEOLOGY

EARTH SCIENCE

MAGNETISM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A generator converts mechanical energy to electrical energy. When a coil placed between two magnets rotates, the magnetic lines of force are disturbed. This induces a current in the coil.What could be done to make the lamp less bright?
A
use a lamp that lights up with a lower current
B
turn the coil faster
C
increase the strength of the magnets
D
move the magnets farther from the coil
Explanation: 

Detailed explanation-1: -An alternator is an electrical generator that converts mechanical energy to electrical energy in the form of alternating current. For reasons of cost and simplicity, most alternators use a rotating magnetic field with a stationary armature.

Detailed explanation-2: -An electric generator, or dynamo, is a device which converts mechanical energy into electrical energy. The simplest practical generator consists of a rectangular coil rotating in a uniform magnetic field. The magnetic field is usually supplied by a permanent magnet.

Detailed explanation-3: -False, An electric motor converts electrical energy into mechanical energy.

Detailed explanation-4: -This is called electromagnetic induction. Basically, an electrical generator is an engineered means of continuously moving multiple wires through magnetic fields to produce a steady electrical current, so the motion’s kinetic energy(a part of mechanical energy) is being converted into electrical energy. Q.

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