Electrical power + building circuits

Question 1

Power

Answer 1

The rate at which energy is changed from one form to an other

Question 2

How to calculate power?

Answer 2

P =vi

Question 3

What is dc

Answer 3

Direct current: where the current flows in one direction only

Question 4

What is Ac

Answer 4

Allternating current: where current flows in one direction for fraction of a second, then changes direction and flows ‘backwards!

Question 5

Where can you find dc

Answer 5

Batteries

Question 6

Where can you find Ac

Answer 6

Sockets

Question 7

What is a diode

Answer 7

Electronic component made ofsemiconductor material

Question 8

Symbol for diode is forward bias

Answer 8

Triangle pointing towards line.

Question 9

What is difference between reverse And forward bias?

Answer 9

Forward bias will allow electricity to flow while reverse won’t.

Question 10

LED

Answer 10

Light - emitting diode l only allow current to flow in one direction

Question 11

L D R

Answer 11

Light dependent resistors resistor that changes its resistance based on how much light is falling on it.