Circuits

Question 1

Current

Answer 1

§ The flow of electrons around a circuit
§ Amount of charges passing through a point in any given second
§ Higher current
□ More electricity entering circuit components every second
□ Allows components to run using more charge
§ Symbol: I
§ Current measured in amperes amps (A)
§ Milliampere = amps/1000

Question 2

Ohms

Answer 2

The standard unit of resistance

Question 3

Circuit

Answer 3

A number of components connected together to form a closed loop

Question 4

Electrons

Answer 4

A negatively charged subatomic particle that can be either bound to an atom or free

Question 5

Resistance

Answer 5

§ A material’s opposition to the flow of electrical current
§ How much a circuit resists the passage of current through it
§ Restricts the flow of electrons
§ Higher resistance
□ Component will heat up more as current passes through
§ Symbol: R
§ Resistance measured in ohms: (Ω)

Question 6

Amps

Answer 6

The standard unit of current

Question 7

Volts

Answer 7

§ A measure of the amount of ‘push’ supplied to electrons in a circuit
§ How much energy is lost by a current traveling through a circuit
§ Higher voltage - more energy is provided to a circuit
§ Symbol: V
§ Voltage measured in volts: (V)