Gr.9 Current Energy and Circuts

What is current electricity?

electrons flowing through a closed circuit

What is electric current?

amount of energy in a circuit per given time

Formula for electric current?

I(A) = Q(C)/t(s)

What is electric potential energy?

How much energy is being held per unit charge?

What is potential difference?

The difference between electric potential energy in two points of a circuit

Formula for potential difference?

∆V(V) = ∆E(J)/Q(C)

What is electron flow?

flow of electrons from the negative terminal into to positive terminal

What is an electrical circuit?

Closed path which electrons powered by a source can flow through

Three parts of an electrical circuit?

1)Energy Source 2)Conducting wires 3)Load

What is a parallel circuit?

A circuit which electrons have different paths and loads to go through

What is a series circuit?

A circuit which electrons have only one path to go through

What is electrical resistance?

The property of a substance hindering and converting electric current

What is a resistor?

A device used for decreasing electrical current

What 4 factors do resistors depend on?

1)material used

2)length (longer = higher R)

3)Thickness (thinner = higher R)

4) Temperature (hotter = higher R)

What is Ohm's Law?

Current that flows in a circuit is proportional to the voltage

Ohm's law formula

R(ohms) = V(V)/I(A)

Kirchoff's rules in series circuit

Current: IT = I1 = I2 = I3

Potential Difference: VT = V1 + V2 + V3

Resistance: RT = R1 + R2 + R3

Kirchoff's rules in Parallel circuit

Current: IT = I1 + I2 + I3

Potential Difference: VT = V1 = V2 = V3

Resistance: 1/RT = 1/R1 + 1/R2 + 1/R3