DC ELECTRICS

Question 1

List of good conductors

Answer 1

Copper , silver and aluminium

Question 2

List of insulators

Answer 2

Wood , glass, rubber and plastic

Question 3

Current is

Answer 3

A flow of electrons measured in amps

Question 4

If a circuit overload occurs but is not detected

Answer 4

The electrical line could overheat and there could be a fire

Question 5

DC to AC

Answer 5

Inverter !

Question 6

In a dc motor if there’s an increased load then

Answer 6

Armature current will increase
And torque will increase
Due to the back emf being reduced - more load adding more mechanical resistance to the spin

Question 7

DC generator max power is achieved by

Answer 7

Placing them in parallel - pushing P
Power and parallel

Question 8

A thermal CB

Answer 8

Protects the system in the event of a prolonged over current

Question 9

A likely cause of a short circuit is

Answer 9

Poor insulation of electric wires

Question 10

Electrical power is defined as

Answer 10

P=E/T

Question 11

When disconnect the switch is activated on electrical panel

Answer 11

It disconnects the IDG from gearbox
dIsGonnected