GCSE Physics - Components #19

The video tutorial covers various components of electrical circuits, including power sources like cells and batteries, and control elements such as switches. It explains the function of filament lamps, fuses, and diodes, including LEDs. The tutorial also introduces measuring instruments like ammeters and voltmeters, and discusses different types of resistors, including fixed, variable, light-dependent resistors (LDRs), and thermistors. LDRs are highlighted for their use in light-sensitive applications, while thermistors are noted for their temperature-dependent resistance, useful in devices like car engines and thermostats.

Which component in a circuit is used to control the flow of electricity by opening or closing the circuit?

• Diode

• Battery

• Switch

• Fuse

What is the primary function of a diode in an electric circuit?

• To emit light

• To measure current

• To provide resistance

• To allow current to flow in one direction

How is an ammeter connected in a circuit to measure current?

• In parallel

• In series

• Across the power source

• Next to a resistor

What happens to the resistance of a light-dependent resistor (LDR) in bright light?

• It decreases

• It fluctuates

• It increases

• It remains constant

In what type of environment would a thermistor have high resistance?

• Darkness

• Bright light

• Low temperature

• High temperature