Ohm's Law Questions and Answers

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Showing 10 of 16 questions
Q1
"Half-splitting" is
  • A a means for nuclear fuel cells to produce electricity
  • B a means of isolating a problem in a circuit
  • C a means for reducing a high ac voltage to a low dc voltage
  • D a means of limiting current in a circuit
Answer: Option B
Q2
If doubling the voltage across a resistor doubles the current through the resistor then
  • A the resistor value decreased
  • B the resistor value did not change
  • C the resistor value increased
  • D it is impossible to determine the change in the resistor value
Answer: Option B
Q3
If the voltage across a fixed value of resistance is increased five times, what does the current do?
  • A It increases by a factor of five.
  • B It decreases by a factor of five.
  • C It stays the same.
  • D Not enough information
Answer: Option A
Q4
If the resistance in a circuit with constant voltage increases, the current will
  • A increase
  • B decrease
  • C stay the same
  • D Not enough information
Answer: Option B
Q5
What is the kilowatt-hour consumption of a 40 W lamp if it remains on for 1750 h?
  • A 43.75
  • B 70
  • C 43,750
  • D 70,000
Answer: Option B
Q6
A damaged resistor
  • A may appear burned
  • B may have an increased resistance value
  • C may be checked with an ohmmeter
  • D All of the above
Answer: Option D
Q7
Power supplies differ from batteries in that
  • A power supply output voltages are ac and not dc
  • B power supply voltages are not stable
  • C power supplies are low-current devices
  • D None of the above
Answer: Option D
Q8
If voltage across a resistance doubles
  • A the current is halved
  • B the resistance doubles
  • C the current is unchanged
  • D none of the above
Answer: Option D
Q9
Ohm's law describes the mathematical relationship between
  • A ohms, kilohms, and megohms
  • B resistor size and resistor value
  • C resistance, voltage, and current
  • D none of the above
Answer: Option C
Q10
Energy is defined as the ability to
  • A produce heat
  • B produce light
  • C produce sound
  • D All of the above
Answer: Option D

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