GCSE Physics: Electrical Components and Their Symbols

What is the primary function of a cell in an electrical circuit?

• To reduce the flow of electrons

• To provide electrical energy

• To measure the current

• To emit light

What does a switch do in its closed state?

• Measures voltage

• Stops the current

• Allows the current to flow

• Changes resistance

What does a voltmeter measure in an electrical circuit?

• Voltage

• Resistance

• Light intensity

• Current flow

How can a variable resistor affect an electrical circuit?

• It measures the current

• It stops the current

• It emits light

• It changes the size of the current

What is the symbol for a bulb that converts electrical energy into light?

• A rectangle

• A circle with an 'M'

• A circle with a 'V'

• A circle with a cross

How does a diode function in a circuit?

• It allows current to flow in both directions

• It converts kinetic energy

• It measures voltage

• It allows current to flow only in one direction

What changes the resistance of a thermistor?

• Temperature

• Current direction

• Voltage

• Light intensity

What is the primary use of an LDR in modern electronic systems?

• To store energy

• To measure current

• To emit light

• To detect light changes

What additional feature does an LED have compared to a standard diode?

• It measures voltage

• It changes resistance

• It stops the current

• It emits light when current flows in the forward direction

What triggers a fuse to break a circuit?

• High resistance

• Excessive current

• Voltage drop

• Light intensity