Intro To Electrical

Question 1

Ohms law

Answer 1

The relationship between amps, Ohms and volts
Volt = amps x Ohms or E= I x R
- E is electromotive force in volts
- I is intensity of current in amps
- R is the resistance in ohms
Using the formula above precise calculations can be made for Direct Current ( DC) circuits and reasonably accurate calculations for Altering Current (AC) circuits

Question 2

Parallel circuits

Answer 2

When applying ohms law to a parallel circuit the total resistance is calculated by using the following formula:

1/Rt = 1/R1 + 1/R2  Where Rt is total resistance 
         R1 is the resistance of one device or branch of the circuit
         R2 is the resistance of one device or branch of the circuit

Question 3

Electromagnetism

Answer 3

Two types of magnets:
- permanent magnets which sustain magnetism over time
- electromagnets which are magnetic only when energized
Every magnet except a closed ring type of magnet has two poles north and south
The basic magnet law states that like poles repel each other,unlike poles attract each other

Question 4

Terms

Answer 4

Electricity.- movement of electrons in a conductor
Amperes.- current or flow in electrical theory
ohms.- resistance to electrical current flow
Volts.- electrical pressure in a circuit which maintains flow
( one volt is required to cause one ampere of current to flow
Against a resistance of one ohm)