Energy and voltage in circuits

What happens to the resistance of an LDR with increasing illumination

It decreases with increasing illumination

How does the resistance of a thermistor change with temperature

Decreases as temperature increases

How are leds and lamps used in a circuit

Used to indicate presence of current

What is ohms law

Voltage = current x resistance

What is current

Rate of flow of charge

What is the formulae for charge

Charge = current x time

What is electric current

A flow of negatively charged electrons

Why is a current conserved at a junction in a circuit

Because charge can not be created or destroyed total current entering a junction = total current leaving a junction

What happens to voltage across components connected in parallel

Voltage is the same

What is voltage in terms of energy transfer

Energy transferred per unit charge passed

Energy transferred

Charge x voltage

Why would u choose a parallel or series circuit

Parallel is used for domestic lighting as components work independently

How does current behave in a series circuit

Depends on voltage

What is the effect of changing resistance

Increasing resistance decreases current and decreasing resistance increases current