A) air
B) iron
C) air and iron
D) none of these
Correct Answer: B
Solution :
Chokes are inductances that isolate AC frequency current from certain areas of a radio circuit. Chokes depend upon the property of self-inductance for their operation. They are used to block alternating current while passing direct current. Radio frequency coil i.e., a low frequency choke coil is made of insulated copper wire wound on a soft iron core.
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