Basic Electronics Quiz

What is the function of a diode?

• Increases the current in a circuit

• Allows current to flow in both directions

• Allows current to flow in one direction only

• Emits light when current flows through it

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

• It reduces the current in a circuit

• It allows current to flow in both directions

• It can store electrical energy

• It emits light

What is the purpose of a switch in a circuit?

• To emit light

• To increase the voltage

• To allow or stop the flow of current

• To decrease the resistance

How are higher value resistors typically marked?

• With a barcode

• With letters

• With colored bands

• With numbers printed on them

What does the fourth band on a resistor indicate?

• The power rating

• The temperature coefficient

• The resistance value

• The accuracy rating

What is the configuration of the lamps in the first simple circuit described?

• One lamp in parallel

• Two lamps in parallel

• Two lamps in series

• One lamp in series

How many cells are used in the second simple circuit described?

• One cell

• Two cells in parallel

• Two cells in series

• Three cells in series

What is a common use for LEDs in circuits?

• To decrease voltage

• To increase resistance

• As a power source

• As an indicator that a circuit is 'ON'

What is the main characteristic of a diode?

• It stores electrical energy

• It allows current to flow in one direction only

• It emits sound

• It changes color with temperature

What is the primary function of a resistor in a circuit?

• To emit light

• To increase current

• To limit the flow of current

• To decrease voltage