Resistor -Multiple Choice Questions Quiz

Question 1: What is a resistor?

(a) A device that stores electrical energy.
(b) A device that converts electrical energy into mechanical energy.
(c) A device that opposes the flow of electric current.
(d) A device that increases the voltage in an electrical circuit.

Question 2: What unit is used to measure resistance?

(a) Ohm
(b) Watt
(c) Volt
(d) Ampere

Question 3: Which color represents the highest value of resistance in a color-coded resistor?

(a) Black
(b) Red
(c) Green
(d) White

Question 4: What happens to the resistance of a conductor when its length is doubled, keeping its cross-sectional area constant?

(a) Resistance doubles
(b) Resistance halves
(c) Resistance remains the same
(d) Resistance becomes zero

Question 5: Which of the following materials is commonly used as a variable resistor?

(a) Copper
(b) Aluminum
(c) Carbon
(d) Silver

Question 6: What is the relationship between resistance (R), voltage (V), and current (I) in a circuit, according to Ohm's law?

(a) R = V + I
(b) R = V × I
(c) R = V / I
(d) R = V - I

Question 7: Which type of resistor is specifically designed to have a resistance that changes with temperature?

(a) Fixed resistor
(b) Variable resistor
(c) Thermistor
(d) Potentiometer

Question 8: What is the purpose of using resistors in LED circuits?

(a) To increase the brightness of LEDs
(b) To decrease the voltage across LEDs
(c) To prevent LEDs from drawing excessive current
(d) To convert AC voltage to DC voltage for LEDs

Question 9: Which type of resistor has a fixed, unchangeable resistance value?

(a) Variable resistor
(b) Potentiometer
(c) Thermistor
(d) Fixed resistor

Question 10: Which material is often used to create precision resistors due to its stable and predictable resistance characteristics?

(a) Carbon
(b) Metal alloy
(c) Copper
(d) Aluminum

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Total score: /10

Answer key:

Question 1: c

Question 2: a

Question 3: d

Question 4: a

Question 5: c

Question 6: c

Question 7: c

Question 8: c

Question 9: d

Question 10: b