Communication Quiz U1

What is the main difference between Direct Current (DC) and Alternating Current (AC)?

• DC flows in both directions, AC flows in one direction.

• DC flows in one direction, AC changes direction periodically.

• DC changes direction periodically, AC flows in one direction.

What is the unit of resistance, and what symbol represents resistance?

• Unit: Ampere (A), Symbol: R

• Unit: Ohms (Ω), Symbol: V

• Unit: Ohms (Ω), Symbol: R

Describe Ohm's Law.

• Voltage is directly proportional to current and resistance.

• Current is directly proportional to voltage and resistance.

• Resistance is directly proportional to voltage and current.

What is the main function of an inductor?

• Store energy in a magnetic field.

• Store energy in an electric field.

• Store energy in a gravitational field.

Which component stores energy in the form of an electrical charge?

• Resistor

• Inductor

• Capacitor

What does a diode do in an electronic circuit?

• Amplifies signals

• Controls the flow of current in one direction

• Stores energy in a magnetic field

In a series connection of resistors, how is the total resistance (RT) calculated?

• RT = R1 + R2

• RT = R1 * R2

• RT = R1 - R2

What happens in a parallel connection of resistors?

• Total resistance is the sum of individual resistances.

• Total resistance is the reciprocal of the sum of reciprocals of individual resistances.

• Total resistance is the difference between individual resistances.

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

• Amplify signals

• Act as a one-way switch for current

• Store energy in a magnetic field

How does a transistor amplify signals in a circuit?

• By storing energy in a magnetic field.

• By acting as a one-way switch for current.

• By controlling the flow of current using semiconductor properties.