Understanding Passive Electronic Components

What is the primary function of a resistor?

• To store electrical energy for later use.

• To increase the voltage in a circuit.

• To create a short circuit intentionally.

• To limit or regulate the flow of electrical current in a circuit.

Which unit is used to measure resistance?

• Ampere

• Ohm

• Volt

• Watt

What happens to current when resistance increases?

• Current increases when resistance increases.

• Current remains the same when resistance increases.

• Current fluctuates randomly with resistance changes.

• Current decreases when resistance increases.

What is the main purpose of a capacitor in a circuit?

• To provide a path for current to flow continuously.

• The main purpose of a capacitor in a circuit is to store and release electrical energy.

• To amplify electrical signals in a circuit.

• To convert AC to DC voltage.

In which application are capacitors commonly used?

• Mechanical devices

• Power supplies, audio equipment, and radio frequency applications.

• Heating systems

• Optical instruments

What is the unit of capacitance?

• ohm

• farad

• volt

• watt

How does a capacitor store energy?

• A capacitor stores energy as heat generated by current flow.

• A capacitor stores energy in an electric field created by the separation of charge on its plates.

• A capacitor stores energy by compressing air between its plates.

• A capacitor stores energy in a magnetic field created by its coils.

What role does an inductor play in a circuit?

• An inductor acts as a short circuit for high frequencies.

• An inductor converts electrical energy into heat.

• An inductor amplifies current in a circuit.

• An inductor stores energy and resists changes in current in a circuit.

What is the unit of inductance?

• farad

• ohm

• volt

• henry

How does an inductor oppose changes in current?

• An inductor increases current flow by reducing resistance.

• An inductor stores energy as heat to maintain current flow.

• An inductor opposes changes in current by inducing an EMF that resists the change.

• An inductor allows current to flow freely without resistance.