Electronic Components and Their Functions

What is the function of an LED?

• To emit light when an electric current passes through it

• To store electrical energy

• To amplify electrical signals

• To convert AC to DC

Which component is used to display numbers or some letters?

• LCD

• Speaker

• Microphone

• Camera

What is the symbol for a CdS Cell?

• CdS Cell

• CdTe Cell

• Si Cell

• GaAs Cell

Which component converts electrical energy to sound?

• Speaker

• Resistor

• Capacitor

• Transistor

What is the function of an Earphone?

• To listen to audio privately

• To charge a phone

• To take photographs

• To browse the internet

Which component is used to pick up radio signals?

• Antenna

• Speaker

• Microphone

• Transistor

What is the function of an Output Transformer?

• To match the output of the circuit to the speaker

• To increase the voltage output

• To decrease the current output

• To convert AC to DC

Which component lets you tune to a specific frequency?

• Tuner

• Amplifier

• Speaker

• Microphone

What is the function of a Control?

• The function of a Control is to provide a standard for comparison in an experiment, ensuring that the results are due to the variable being tested.

• The function of a Control is to increase the complexity of an experiment.

• The function of a Control is to ensure that the experiment is conducted in a vacuum.

• The function of a Control is to provide additional variables to test.

Which component connects or disconnects electrical circuits?

• Switch

• Resistor

• Capacitor

• Inductor