A) It is cheaper.
B) It is lighter.
C) It is compact.
D) It does not create vibration or hum.
Correct Answer: D
Solution :
| Option [d] is correct |
| Explanation: Audible vibration or hum in transformers is caused by vibration of the windings and core layers from the forces between the coil turns and core laminations. |
| The toroidal transformer's construction helps quiet this noise. For this reason, many sound system engineers prefer to use a toroidal transformer instead of a traditional laminated transformer. |
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