Electrical Circuits Revision Lesson

Electrical Circuits Revision Lesson

Multiple Choice

Thinking about a marble run. What do the marbles in the run represent?

• Electrons in the current

• Voltage

• Resistance

Multiple Choice

What is voltage in an electric circuit?

• The slowing down of the electrons in the circuit

• The amount of energy the electrons in the circuit have

• The electrons in the circuit

Multiple Choice

What is resistance in an electric circuit?

• The using up of the current's energy

• The amount of energy the electrons in the circuit have

• The electrons in the circuit

Imagine an electric circuit as a marble run

Multiple Choice

Select the type of circuit shown in the diagram.

• Series

• Parallel

• Electrical

• Appliance

Multiple Choice

Select the type of circuit shown in the diagram

• Advanced Circuit

• Series

• Parallel

• Electric

Multiple Choice

Select the correct unit for current

• Volts

• Amperes

• Ohm's

Multiple Choice

Select the correct unit for voltage

• Volts

• Amperes

• Ohm's

Multiple Choice

Select the correct unit for resistance

• Volts

• Amperes

• Ohm's

Multiple Choice

What is the correct equation for Ohm's Law?

• R = VI

• I = VR

• V = IR

Ohm's Law

States that as current increases voltage also increases

Current and Voltage are directly proportional to each other

Multiple Select

Select the statements about electric circuits that are true.

• The current at each point in a series circuit is the same

• The current gets used up as it moves around an electric circuit

• The voltage gets used up as it moves around an electric circuit

• All components in an electric circuit provide resistance to the current as it moves around

Multiple Select

Select the statements that are true about series and parallel circuits

• In a parallel circuit the current has just one path to flow through

• In a series circuit the current has just one path to flow through

• In a parallel circuit the current can choose which path it follows

• In a series circuit the current can choose which path it follows

A Series Circuit

has just one path for the current to pass through

A parallel circuit

has more than one path for the current to pass through

Multiple Select

Select the statements that are true about the brightness of bulbs in parallel and series circuits

• When adding bulbs in parallel the brightness decreases

• When adding bulbs in series the brightness decreases

• When adding bulbs in series the brightness increases

• When adding bulbs in parallel the brightness increases

Adding bulbs in series

The energy is SHARED between the two bulbs, so the brightness is less

Adding bulbs in parallel

The brightness increases

The resistance in the circuit is less because there are more paths for the same current to travel down.

Multiple Select

Select the components of the atom that are present in the nucleus

• Electron

• Neutron

• Proton

Multiple Choice

Select the correct Charge Equation

• Q = IV

• Q = It

• I = Qt

• E = QV

Multiple Select

Select the correct units and name for the symbol Q in the equation

• Current

• Charge

• Resistance

• Ohm's

• Coulombs

Multiple Choice

Select the correct symbol for Current measured in Amperes:

• $\Omega$

• C

• I

• R

Multiple Choice

What is the purpose of an LDR?

• To detect changes in resistance

• To detect changes in light intensity

• To detect changes in temperature

Multiple Choice

What is the purpose of a Thermistor?

• To detect changes in resistance

• To detect changes in light intensity

• To detect changes in temperature

Light Dependent Resistor

Is used in:

Mobile phone screens

Position sensors

Street light sensors

Automatic house lights

Automatic headlights

Light Dependent Resistor

When the light intensity is high the resistance it has is low

Thermistor

Is used in:

Ovens

Fire Alarms

Refrigerators

Thermistor

Detects changes in temperature

When the temperature his high the resistance it provides is low

Multiple Choice

What is the correct electrical energy equation?

• E = QV

• V = IR

• Q = It

• F = ma