Voltage and Current Questions and Answers

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Showing 10 of 39 questions
Q11
If 40 C of charge flow past a point in 20 s, what is the current?
  • A 2 A
  • B 0.5 A
  • C 20 A
  • D 40 A
Answer: Option A
Q12
Batteries differ from fuel cells in that
  • A a battery is a closed system
  • B a battery uses hydrogen and oxygen to create electricity
  • C a battery uses a polymer electrolyte membrane
  • D none of the above
Answer: Option A
Q13
The removal of a non-neutral subatomic particle converts the atom into a:
  • A charged ion
  • B nucleus
  • C heavier element
  • D compound
Answer: Option A
Q14
One coulomb passing a point in one second is one:
  • A ampere
  • B volt
  • C ohm
  • D charge
Answer: Option A
Q15
In which states may matter may be found?
  • A solid, liquid, or mineral
  • B solid, gas, or liquid
  • C mineral, gas, or liquid
  • D plastic, solid, or gas
Answer: Option B
Q16
Material that consists of a mixture of elements is considered to be:
  • A an element
  • B an ion
  • C a compound
  • D a molecule
Answer: Option C
Q17
How many valence shell electrons are there in semiconductor atoms?
  • A 16
  • B 8
  • C 4
  • D 2
Answer: Option C
Q18
When considering conventional current versus electron current flow:
  • A electron current flow came first
  • B protons move in conventional current flow
  • C conventional current flow came first
  • D the direction of current is the same in both methods
Answer: Option C
Q19
Which unit of charge contains 6.25 × 1018 electrons?
  • A An ampere
  • B A coulomb
  • C A volt
  • D A joule
Answer: Option B
Q20
A switch is a device that:
  • A short circuits complex circuits
  • B holds a fuse
  • C has double poles
  • D opens or completes a current path
Answer: Option D

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