Multiple Choice
The principal difference between a solenoid and a relay is that:
A) solenoids do electrical work, relays do mechanical work.
B) solenoids do mechanical work, relays do electrical work.
C) relays use magnets, solenoids do not.
D) relays relay electricity, solenoids do not
Correct Answer:
Verified
Correct Answer:
Verified
Q2: The quantity of lines of force per
Q3: An iron core electromagnet has a higher
Q4: A permanent magnet will retain its magnetism
Q5: A strong magnetic field around a conductor
Q6: The voltage produced by a magnetic field
Q7: An <i>ampere-turn</i> is a unit of _.<br>A)magnetomotive
Q8: Electromagnetic induction is best defined as the
Q9: The left-hand rule can be used to
Q10: The _ electromagnet cannot be further magnetized.<br>A)open<br>B)shorted<br>C)saturated<br>D)capacitive
Q11: If more turns of Wire are added