Physics-P4: Electric Circuits

What is the unit for current?

Amps (A)

What is the unit for charge?

Coulombs (C)

What is the unit for time?

Seconds (S)

What is the unit for voltage?

Volts (V)

What is the unit for energy?

Joules (J)

What is the unit for resistance?

Ohms

Voltage

Energy transferred per unit of charge

Resistance

The effect that reduces a current

Current

Flow of electrons

How does a wire length affect resistance?

Longer wire increases resistance because the wire will be stronger

How is resistance affected by circuits being in series or parallel?

A series circuit has a higher resistance because all electricity is passing through both resistors

What is the relationship between a thermistor and temperature?

A thermistor changes resistance based on temperature, higher temperature=lower resistance

What is the relationship between the resistance of an LDR and light intensity?

The more intense the light, the higher the resistance

How does current change between a series and parallel circuit?

In series circuits current does not change, in parallel the current is the strongest at the top of the circuit however it lowers when it branches off.

Why do adding resistors in series increase the total resistance whilst adding resistors in parallel decreases total resistance?

In series circuits resistors reduce the flow of electrons, increasing resistance, however if you add a resistor in parallel it adds an alternative pathway, increasing the current and decreasing the resistance.

What circuit symbol is this?

Open switch

What circuit symbol is this?

Closed switch

What circuit symbol is this?

Cell

What circuit symbol is this?

Battery

What circuit symbol is this?

Diode

What circuit symbol is this?

Ressistor

What circuit symbol is this?

Variable Ressistor

What circuit symbol is this?

LED

What circuit symbol is this?

Lamp

What circuit symbol is this?

Fuse

What circuit symbol is this?

Voltmeter

What circuit symbol is this?

Ammeter

What circuit symbol is this?

Thermistor

What circuit symbol is this?

LDR