Magnetism and Electromagnetism - General Questions (3)

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Magnetism and Electromagnetism - General Questions

17. 

Which electromagnetic device uses brushes and a commutator?
A. A speaker
B. A dc generator
C. A relay
D. A solenoid

Answer: Option B

Explanation:

No answer description available for this question

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18. 

Permeability is the inverse equivalent of which electrical term?
A. Voltage
B. Current
C. Resistance
D. Conductance

Answer: Option C

Explanation:

No answer description available for this question

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