Electrical power and energy test
3 years ago
gbrooks927
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33 QuestionsShow answers
  • Question 1
    30 seconds
    Q. What quantities do you need to calculate energy?
    answer choices
    Current and Voltage 
    Power and time
    Resistance and current
    Power and Voltage
  • Question 2
    30 seconds
    Q. What quantities do you need to calculate power?
    answer choices
    Current and Voltage 
    Power and time
    Resistance and current
    Power and Voltage
  • Question 3
    30 seconds
    Q. What are the units for energy?
    answer choices
    kWh
    Joules
    Both
    Neither
  • Question 4
    120 seconds
    Q. How many kilowatts are in 6500 W
    answer choices
    0.65 kW
    6.5 kW
    65 kW
    6,500,000 kW
  • Question 5
    120 seconds
    Q. How many kilowatts are in 500 W
    answer choices
    0.5 kW
    5 kW
    50 kW
    500,000 kW
  • Question 6
    120 seconds
    Q. How many kilowatts are in 80 W
    answer choices
    0.008 kW
    0.08 kW
    0.8 kW
    8 kW
  • Question 7
    120 seconds
    Q. How many watts are in 0.003 kW
    answer choices
    0.3 W
    3 W
    300 W
    3000 W
  • Question 8
    120 seconds
    Q. How many watts are in 2 kW
    answer choices
    0.2 W
    2 W
    200 W
    2000 W
  • Question 9
    120 seconds
    Q. How many seconds are in 4 hours
    answer choices
    240 s
    14400 s
    0.067 s
    400
  • Question 10
    180 seconds
    Q. How many seconds are in 9 days
    answer choices
    540 s
    32400 s
    12960 s
    777,600 s
  • Question 11
    120 seconds
    Q. How many hours are in 90 min
    answer choices
    5400 hr
    1.3 hr
    .5 hr
    1.5 hr
  • Question 12
    120 seconds
    Q. How many hours are in 12 min
    answer choices
    720 hr
    0.2 hr
    .12 hr
    1.2 hr
  • Question 13
    900 seconds
    Q. What is the electrical energy of a 750 W waffle iron that is used for 15 min
    answer choices
    11,250 kWh
    11.25 kWh
    0.1875 kWh
    50 kWh
  • Question 14
    900 seconds
    Q. What is the electrical energy of a 70 W TV that is used for 110 hr
    answer choices
    0.63 kWh
    7700 kWh
    1.57 kWh
    7.7 kWh
  • Question 15
    900 seconds
    Q. What is the power rating of a space heater that uses 1.2 kWh of energy in 45 min?
    answer choices
    0.026 kW
    54 kW
    0.9 kW
    1.6 kW
  • Question 16
    900 seconds
    Q. What is the power rating of an oven that uses 4 kWh of energy in 2 hours?
    answer choices
    0.5 kW
    8 kW
    6 kW
    2 kW
  • Question 17
    900 seconds
    Q. How much time did you play video games if the PS4 uses 110 W of power and you used a total of 16.5 kWh of energy?
    answer choices
    6.63 hrs
    0.15 hrs
    150 hrs
    50 hrs
  • Question 18
    900 seconds
    Q. How much time did you cook dinner if the oven uses 1.5 kW of power and you used a total of 13.5 kWh of energy?
    answer choices
    9 hrs
    0.1 hrs
    20.25 hrs
    5 hrs
  • Question 19
    900 seconds
    Q. What is the energy used of a light bulb if it is plugged into a 120 V outlet for 90 hrs and has 240 Ohms of resistance?
    answer choices
    5.4 kWh
    60 kWh
    54 kWh
    0.5 kWh
  • Question 20
    900 seconds
    Q. How much does it cost to run you 70 W TV for 120 hrs at $0.10 per kWh
    answer choices
    $0.84
    $840
    $8.4 
    $0.17
  • Question 21
    30 seconds
    Q. What is the equation for power?
    answer choices
    V = IR
    P = IV
    P = IR
    P = I/V
  • Question 22
    30 seconds
    Q. What is the unit of electrical power?
    answer choices
    watt
    volt
    ampere
    ohm
  • Question 23
    300 seconds
    Q. What will be the current drawn by an electric bulb of 1000 W when it is connected to a source of 220 V?
    answer choices
    4.55 A
    28800 J or 28.8 KJ
    80 W
    200 W
  • Question 24
    300 seconds
    Q. A current of 4 A flows through a 20 V car headlight bulb. Calculate the electric power.
     
    answer choices
    80 W
    200 W
    2.5 A
    4.55 A
  • Question 25
    300 seconds
    Q. Calculate the electric power of an electrical appliance in which 10 A of current is flowing through a resistor of 2 ohms.
     
    answer choices
    80 W
    200 W
    2.5 A
    22.5 KJ
  • Question 26
    300 seconds
    Q. Calculate the electric power of an electrical appliance of 20 V having a resistance of 10 ohms.
     
    answer choices
    200 W
    40 W
    2.5 A
    79.20 KJ
  • Question 27
    180 seconds
    Q. a pair of 15-watt computer speakers are connected to a 12-volt power supply. what is the electric current running through the speakers? 
    answer choices
    1.25 A
    0.8 A
    12.5 A
    180 A
  • Question 28
    30 seconds
    Q. How many amps are in 800mA?
    answer choices
    800,000 A
    8 A
    0.8 A
    80 A
  • Question 29
    180 seconds
    Q. If the ammeter shows a reading of 997 mA, how many amps of current is flowing through the circuit?
    answer choices
    997 A
    99.7 A
    9.97 A
    .997 A
  • Question 30
    300 seconds
    Q. When measuring a circuit you get a voltmeter reading of 3 volts and an ammeter reading of 600 mA.  What is the power being supplied to the device?
    answer choices
    1.8 W
    1800 W
    0.005 W
    5 W
  • Question 31
    900 seconds
    Q. What is the total current of ten 90 W light bulbs connected on the same circuit? 
    answer choices
    0.75 A
    7.5 A
    1.33 A
    13.3 A
  • Question 32
    900 seconds
    Q. 20 identical lightbulbs are connected to a circuit. What is the power of each lightbulb if the total current is 15 A? 
    answer choices
    1800 W
    300 W
    90 W
    8 W
  • Question 33
    900 seconds
    Q. How many 50 W light bulbs can you put on a circuit that can hold a maximum of 10 A
    answer choices
    5 Light bulbs
    2 Light bulbs
    12 Light bulbs
    24 Light bulbs
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