Analog Electronics - Topics 1

What is function of a resistor in an electronic circuit?

• A tool used to connect circuits

• A device used to generate heat

• An item used to control current flow in a circuit

• A machine used to amplify voltage

What is the power rating of a resistor?

• The maximum amount of power or heat that the resistor can dissipate without burning up or changing value

• The minimum amount of power or heat that the resistor needs to function

• The amount of current that flows through the resistor

• The amount of voltage that the resistor generates

What is the formula for finding the total resistance of two resistors connected in parallel?

• R = R1 + R2

• R = R1 x R2

• R = 1 / (1/R1 + 1/R2)

• R = R1 - R2

What is the formula for finding the total resistance of resistors connected in series?

• R = R1 + R2 + R3 + R4 + ...

• R = R1 x R2 x R3 x R4 x ...

• R = R1 - R2 - R3 - R4 - ...

• R = R1 / R2 / R3 / R4 / ...

What is the resistor color code?

• The value in ohms of a resistor is indicated by the color bands around one end of the resistor or printed on its body.

• The value in ohms of a resistor is indicated by the number of bands around one end of the resistor or printed on its body.

• The value in ohms of a resistor is indicated by the color of the resistor's body.

• The value in ohms of a resistor is indicated by the size of the resistor.

What is the difference between a rheostat and a potentiometer?

• A rheostat has all three connections in use, while a potentiometer has only two.

• A rheostat is used to adjust the color or positioning of computer monitors, while a potentiometer is used in dimming switches for lamps.

• A rheostat adjusts one end of the track, while a potentiometer adjusts both ends.

• A rheostat is used in circuits that require further adjustment, while a potentiometer is a miniature version called a preset.

What is the purpose of a variable resistor?

• To limit current

• To divide voltage

• To generate heat

• To change its resistance value

What type of resistor has a set resistance value that cannot be changed?

• Variable resistor

• Rheostat

• Potentiometer

• Fixed resistor

What are the two main categories of resistors?

• Fixed and adjustable

• Conductive and insulative

• High and low voltage

• Carbon and film

What is the unit of resistance?

• Hertz

• Ohms

• Watts

• Amps