Electrical Insulator -Multiple Choice Questions Quiz

Interactive MCQs on “Electrical Insulator”:

Solve the following 10 questions. Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: What is an electrical insulator?

(a) A material that allows the flow of electric current with low resistance
(b) A material that completely blocks the flow of electric current
(c) A material that allows the flow of electric current without any resistance
(d) A material that restricts or prevents the flow of electric current

Question 2: Which of the following materials is a good electrical insulator?

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

Question 3: What property of electrical insulators helps to prevent the flow of electric current?

(a) High electrical conductivity
(b) Low electrical resistance
(c) High dielectric strength
(d) High magnetic permeability

Question 4: Which of the following materials is commonly used as an electrical insulator in power cables and electrical devices?

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

Question 5: What happens to an electrical insulator when it is subjected to a high electric field?

(a) It becomes a conductor.
(b) Its dielectric strength increases.
(c) Its resistance decreases.
(d) It may experience electrical breakdown.

Question 6: What is the main purpose of using electrical insulators in electrical systems?

(a) To increase the flow of electric current
(b) To reduce electrical resistance
(c) To protect against electric shocks
(d) To enhance energy efficiency

Question 7: Which of the following materials is not a good electrical insulator and is commonly used as a conductor in electrical wiring?

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

Question 8: What is the unit of measurement for the electrical resistance of an insulating material?

(a) Ohm (Ω)
(b) Volt (V)
(c) Ampere (A)
(d) Ohm-meter (Ω·m)

Question 9: Which of the following properties makes a material a good electrical insulator?

(a) High electrical conductivity
(b) Low melting point
(c) High thermal conductivity
(d) High resistivity

Question 10: Why are birds able to safely sit on high-voltage power lines without getting electrocuted?

(a) Birds have insulating feathers that protect them from electric shocks.
(b) Birds are immune to electric shocks.
(c) Power lines are made of good conductors, so there is no electric field around them.
(d) Birds have high dielectric strength in their bodies.