Electrical Resistance
a year ago
stevenejones
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20 QuestionsShow answers
  • Question 1
    30 seconds
    Q.

    What are the units for electrical resistance?

    answer choices

    ohms

    joules

    volts

    amps

  • Question 2
    30 seconds
    Q.

    In a wire, _________________ flow from negative to positive

    answer choices

    metal atoms

    resistors

    electrons

    ohms

  • Question 3
    30 seconds
    Q.

    A 25 ohm resistor is connected in series with a 15 ohm resistor. What is the total resistance?

    answer choices

    10 ohms

    375 ohms

    40 ohms

    9.4 ohms

  • Question 4
    30 seconds
    Q.

    A 25 ohm resistor is connected in parallel with a 15 ohm resistor. What is the total resistance?

    answer choices

    80 ohms

    375 ohms

    40 ohms

    9.4 ohms

  • Question 5
    30 seconds
    Q.

    Substances with high resistivity such as plastics and ceramics.

    answer choices

    conductors

    insulators

    semiconductors

    fixed resistors

  • Question 6
    30 seconds
    Q.

    The resistance of a piece of wire does not depend on _________________.

    answer choices

    wire material

    wire mass

    wire length

    wire cross sectional area

  • Question 7
    30 seconds
    Q.

    Ohm's law is ________________

    answer choices

    R = V X I

    V= I X R

    I = R X V

    V = I / R

  • Question 8
    30 seconds
    Q.

    The voltage is 5 Volts. The Resistance is 25 ohms. What is the current?

    answer choices

    5 A

    0.2 A

    20 A

    125 A

  • Question 9
    30 seconds
    Q.

    If the resistance remains the same in a circuit but the current increases, what happened to the voltage?

    answer choices

    increases

    decreases

    remains the same

    unknown

  • Question 10
    30 seconds
    Q.

    If the voltage remains the same in a circuit but the resistance increases, what happens to the current?

    answer choices

    increases

    decreases

    remains the same

    unknown

  • Question 11
    30 seconds
    Q.

    If the length of a wire increases, the resistance ____________

    answer choices

    decreases

    increases

    stays the same

    unknown

  • Question 12
    30 seconds
    Q.

    If the cross sectional area of a wire decreases, the resistance in the wire will ____________

    answer choices

    decreases

    increases

    stays the same

    unknown

  • Question 13
    30 seconds
    Q.

    The current is 10 amps. The resistance is 5 ohms. What is the voltage?

    answer choices

    2 V

    5 V

    50 V

    10 V

  • Question 14
    60 seconds
    Q. ____________ allows electricity to flow.
    answer choices
    A conductor
    An insulator
    A magnet
  • Question 15
    60 seconds
    Q. the tendency for a material to oppose the flow of electrons
    answer choices
    current
    circuit
    resistance
    difference
  • Question 16
    45 seconds
    Q. The mathematical relationship between Voltage, Current, and Resistance:
    answer choices
    Faraday's Law
    Tesla's Law
    Edison's Law
    Ohm's Law
  • Question 17
    30 seconds
    Q.

    Which of the following is NOT a conductor?

    answer choices

    Wood

    Wire

    Metal

    Copper

  • Question 18
    60 seconds
    Q. The current passing through bulbs in series will be...
    answer choices
    ...the same
    ...different
  • Question 19
    120 seconds
    Q. If we have several light bulbs connected to a battery in parallel...
    answer choices
    The voltage will be the same across each bulb
    the current will be the same across each bulb
    The current will be the same through each bulb
    The resistance will be the same across each bulb
  • Question 20
    30 seconds
    Q. Choose the material that is an insulator.
    answer choices
    Plastic
    Steel
    Copper
    Aluminum
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