Question

Which one of the following is a magnetic effect of electric current?
a)Speaker
b) Toys
c) Washing machine
d) All of these
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Answer 1

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As suggested by Marie Ampere, a current carrying conductor exerts a force when a magnet is placed in its vicinity. Similarly, a magnet also exerts equal and opposite force on the current carrying conductor. The direction of force over the conductor gets reversed with the change in direction of flow of electric current..........^_^

Answer 2

Option A is the correct answer.

• The applicable machine behind a speaker is the interplay between an electromagnet means a magnet generated by a coil of wire transmitting an electrical current and a continuous magnet like the aspects we squeeze on our refrigerator positioned in its centre.
• Speakers are transducers of energy that renovate electrical energy means audio signals into mechanical wave energy means sound waves. Various speaker drivers utilize electromagnetism to whirl the AC voltage of the audio alarm into diaphragm activity within a magnetic region to generate sound.
• Speaker generates sound by the interchange of a durable magnet and electromagnet.

Hence, option A is the correct answer.

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