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Q.

Is it true that permanent magnets, electromagnets, and current-carrying conductors are the methods of producing magnetic fields?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
A magnetic field states the influence of a magnet on moving electric charges, electric currents, and magnetic materials. A solenoid that conducts current is employed. A solenoid is a coil containing numerous circular tight turns of insulated copper wire. One end of such a solenoid acts as the north pole, while the other acts as the south pole. A magnetic field can be created using a magnetic bar, a round magnet, or a horseshoe magnet. A current-carrying conductor also produces magnetic fields due to the magnetic effect of electric current.
 
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