Electric Circuits

Question 1

The definition of an electric circuit.

Answer 1

An electric circuit is a closed path along which electrical charge flows powered by an energy source.

Question 2

Series Connection vs Parallel Connection ?

Answer 2

Series, components are connected one after the other, only one branch.
Parallel, more than one path for the charge to flow down.

Question 3

What is the definition of potential difference?

Answer 3

Potential difference is the difference in electrical potential energy per unit charge between two points. Also known as Voltage. And emf.

Question 4

Conventional current?

Answer 4

Where current flows from the positive terminal (small) to the negative terminal (tall) of the battery.

Question 5

The potential difference (emf) between two points = …

Answer 5

The amount of energy (in joules) required to move a charge of 1 Coulomb from one point to another.

Or : The work done per unit charge.

Question 6

What is the equation for how Volts relates to Joules.

Answer 6

1V = 1J.C^-1

Question 7

Equations for:
Potential difference for components in series.
Potential difference for components in parallel.

Answer 7

Components in series:
Vtotal = V1 + V2 + V3 + …
Components in parallel:
Vtotal = V1 = V2 = V3 = …

Question 8

What letter represents Current? And Charge?

Answer 8

Current: I
Charge: Q

Question 9

Term for this definition:
The rate at which charge flows with respect to time.
And give equation.
And unit of measurement.

Answer 9

Current.
I = Q/t
Current is equal to charge divided by time.
Ampêre: A

Question 10

What are the two things current tells us?

Answer 10

How much charge is moving.

How fast the charge is moving.

Question 11

Current is … between components in series. And give equation.

Current is … between components in parallel. And give equation.

Answer 11

Current between components in series is THE SAME.
Itotal = I1 = I2 = I3 = …

Current between components in parallel is DIVIDED.
Itotal = I1 + I2 + I3 + …

Question 12

The … the resistance in a branch the … the current. And vice versa.

Answer 12

The LOWER the resistance in a branch the HIGHER the current.

Question 13

What do we do to get:
Total voltage of batteries in series?
Total voltage of batteries in parallel?

Answer 13

In series: Add voltages of the batteries

In parallel: Don’t add the voltages.

Question 14

Definition of resistance?
Unit?
Measured in?

Answer 14

Resistance: Property of a conductor to oppose the flow of electrical charge.
Unit: R
Measured in: Ohms ♎️

Question 15

I = V/R
R = V/I

Answer 15

Learn the above 👍🏽

Question 16

What are the four factors that affect resistance?

Answer 16

1. Material: What is the conductor made of?
2. Length: The longer the wire the greater the resistance.
3. Thickness: The thicker the conductor the lower the resistance.
4. Temperature: The higher the temperature the lower the resistance.

Question 17

Resistors connected in series … the resistance of a circuit. Give the equation.

Resistors connected in parallel … the resistance of a circuit. Give the equation.

Answer 17

Resistors connected in series INCREASES the resistance of a circuit. Give the equation.
Rseries = R1 + R2 + R3 + …

Resistors connected in parallel DECREASES the resistance of a circuit. Give the equation.
Rparallel = 1/R1 + 1/R2 + 1/R3 + …

Question 18

What is the Emf (Potential difference) of a battery.

Answer 18

The amount of energy per unit charge

provided by the cell.

Question 19

What type of circuit (s/p) is:

1: A current divider?
2: A voltage divider?

Answer 19

1: A current divider? A parallel circuit.
2: A voltage divider? A series circuit.

Question 20

A Voltmeter is connected in …

An ammeter is connected in …

Answer 20

Voltmeter connected in parallel

Ammeter connected in series

Question 21

How does energy, Voltage and Charge relate in an equation?

Answer 21

V=w/Q

Volts equal to watts divided by Charge

Question 22

How do you calculate charge passing through a resistor in time?

Answer 22

Q=I x t

Charge is equal to Current multiplied by time.