Current Electricity 1
2 years ago
thephysicsgrove
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15 QuestionsShow answers
  • Question 1
    30 seconds
    Q. Define electric current. 
    answer choices
    It is the work done by the source in driving charges around a complete circuit.
    It is a measure of the rate of flow of electric charge through a given cross-section of a conductor.
    It is the work done by the source in driving a unit charge around a complete circuit.
    It is a measure of the flow of electric charge through a given cross-section of a conductor.
  • Question 2
    30 seconds
    Q. What is the SI unit of electric current?
    answer choices
    Watts
    Voltage
    Joules
    Ampere
  • Question 3
    30 seconds
    Q. What do the arrows in the circuit represent?
    answer choices
    conventional current
    eletromotive force
    electron flow
    voltage
  • Question 4
    30 seconds
    Q. Which instrument is shown in the picture?
    answer choices
    voltmeter
    ammeter
    galvanometer
    multimeter
  • Question 5
    30 seconds
    Q. What is the function of a dry cell?
    answer choices
    A conductor that connect the components together.
    A method of opening or closing the circuit.
    A source of electromotive force that drives electric charges around the circuit.
    A load in which moving charges can do a useful job.
  • Question 6
    30 seconds
    Q. What is the following component?
    answer choices
    dry cell
    fuse
    battery
    resistor
  • Question 7
    30 seconds
    Q. What is the following component?
    answer choices
    dry cell
    fuse
    resistor
    rheostat
  • Question 8
    30 seconds
    Q. What is the following component?
    answer choices
    fixed resistor
    variable resistor / rheostat
    fuse
    ammeter
  • Question 9
    30 seconds
    Q. What does the diagram show?
    answer choices
    an open circuit
    a closed circuit
    a short circuit
    a long circuit
  • Question 10
    30 seconds
    Q. What is the formula for current?
    answer choices
    I = t/Q
    I = W/Q
    I = Q/t
    I = W/t
  • Question 11
    30 seconds
    Q. What is the formula for resistivity of a wire?
    answer choices
    R = ρL/A
    R = ρLA
    R = LA/ρ
    R = L/Aρ
  • Question 12
    30 seconds
    Q. The potential difference across a component is 5 V. The current flowing through the component is 10 A. What is the resistance of the component?
    answer choices
    2 Ω
    0.5 Ω
    50 Ω
    0.05 Ω
  • Question 13
    30 seconds
    Q. A 10 cm long wire with a cross-sectional area of 5 mm3 has a resistance of 40 Ω. It is then replaced with a wire of the same material, 20 cm long and with a cross-sectional area of 20 mm3. What is the new resistance?
    answer choices
    10 Ω
    20 Ω
    40 Ω
    80 Ω
  • Question 14
    30 seconds
    Q. The potential difference across a component is 50 V, and the charge that flows through the component is 25 C. What is the work done to drive these charges through?
    answer choices
    0.5 J
    2 J
    50 J
    1250 J
  • Question 15
    30 seconds
    Q. The amount of charge that flows through a component in 5 minutes is 600 C. What is the current through the component?
    answer choices
    0.5 A
    2 A
    120 A
    3000 A
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