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Beginner 10 questions Pass 70%

Electrical Components Quiz

Identify resistors, capacitors, diodes, relays, fuses and more, and check how each component behaves in a circuit with ten explained questions.

Answer without pressure: the score is educational and every question is explained after submission. Your answers are graded by the server so the answer key is never sent to the browser before you submit.
Question 1 1 pt

What is the main function of a resistor in a circuit?

Question 2 1 pt

A capacitor stores energy in…

Question 3 1 pt

What is the defining behaviour of a diode?

Question 4 1 pt

An LED with a 2 V forward drop is to run at 20 mA from a 9 V supply. What series resistance is needed, in ohms?

Question 5 1 pt

How does a relay use its coil?

Question 6 1 pt

What is the purpose of a fuse?

Question 7 1 pt

An inductor stores energy in…

Question 8 1 pt

A transistor is commonly used to…

Question 9 1 pt

What does a switch do in a circuit?

Question 10 1 pt

A four-band resistor has brown, black, red and gold bands. What is its nominal value, in ohms?

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