Electrical Basics Quiz: Test Your Knowledge of Atoms, Current, and Circuits
How many electrons does a neutral atom with an atomic number of three have?
(d) depends on the type of atom
Answer: (b) 3
What are electron orbits called?
Answer: (a) shells
What are materials in which current cannot be established called?
Answer: (c) insulators
When placed close together, a positively charged material and a negatively charged material will
(b) become neutral
(d) exchange charges
Answer: (c) attract
What is another term for the potential difference?
(c) distance of an electron from the nucleus
Answer: (b) voltage
What is the unit of energy?
Answer: (c) joule
Which of the following is not a type of energy source?
(b) solar cell
Answer: (d) potentiometer
What is the byproduct of a hydrogen fuel cell?
(b) carbon dioxide
(c) hydrochloric acid
Answer: (d) water
What is generally not a possible condition in an electric circuit?
(a) voltage and no current
(b) current and no voltage
(c) voltage and current
(d) no voltage and no current
Answer: (d) no voltage and no current
How is electrical current defined?
(a) free electrons
(b) the rate of flow of free electrons
(c) the energy required to move electrons
(d) the charge on free electrons
Answer: (b) the rate of flow of free electrons
When is there no current in a circuit?
(a) a series switch is closed
(b) a series switch is open
(c) there is no source voltage
(d) both (a) and (c)
(e) both (b) and (c)
Answer: (e) both (b) and (c)
What is the primary purpose of a resistor?
(a) increase current
(b) limit current
(c) produce heat
(d) resist current change
Answer: (b) limit current
What are potentiometers and rheostats types of?
(a) voltage sources
(b) variable resistors
(c) fixed resistors
(d) circuit breakers
Answer: (b) variable resistors
The current in a given circuit is not to exceed 22 A. Which value of fuse is best?
(a) 10 A
(b) 25 A
(c) 20 A
(d) a fuse is not necessary
Answer: (c) 20 A
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