T2 Part 7 Magnetism Flashcards
The MCB used on motor circuits is:
Type C.
What does EMF Stand for ?
Electro Motive Force
A ferro-magnetic material is ?
Iron
Which group of the following statements are true when referring to magnetic fields and flux
(1) They always form complete loops (2) They cross one another (3) They try to contract as if they were stretched elastic threads (4) They repel one another when lying side-by-side in the same direction
c. 1,3,4
What law states that the current is proportional to the Voltage
Ohms Law
Two magnets set with same poles end to end will ?
Repel each other
Two magnets set with same poles end to end will ?
Repel eachother
What is the symbol for Inductive reactance ?
XL
What is inductive reactance measured in
Ohm
The direction of the magnetic field rotating around a cable can be changed by ?
Changing the direction of the current in the cable
A current carrying conductor, situated within a magnetic field, experiences a force that causes it to move. This effect is known as the
Motor effect
What is the symbol for Inductance ?
L
Which one of the following does not have a solenoid coil ?
Lamp
What does Flemings right hand rule apply to ?
Generator effect
What is the unit of current ?
Amps
