Electrical power and energy test
3 years ago
gbrooks927
Save
Edit
Host a game
Live GameLive
Homework
Solo Practice
Practice
• Question 1
30 seconds
Q. What quantities do you need to calculate energy?
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?
Current and Voltage
Power and time
Resistance and current
Power and Voltage
• Question 3
30 seconds
Q. What are the units for energy?
kWh
Joules
Both
Neither
• Question 4
120 seconds
Q. How many kilowatts are in 6500 W
0.65 kW
6.5 kW
65 kW
6,500,000 kW
• Question 5
120 seconds
Q. How many kilowatts are in 500 W
0.5 kW
5 kW
50 kW
500,000 kW
• Question 6
120 seconds
Q. How many kilowatts are in 80 W
0.008 kW
0.08 kW
0.8 kW
8 kW
• Question 7
120 seconds
Q. How many watts are in 0.003 kW
0.3 W
3 W
300 W
3000 W
• Question 8
120 seconds
Q. How many watts are in 2 kW
0.2 W
2 W
200 W
2000 W
• Question 9
120 seconds
Q. How many seconds are in 4 hours
240 s
14400 s
0.067 s
400
• Question 10
180 seconds
Q. How many seconds are in 9 days
540 s
32400 s
12960 s
777,600 s
• Question 11
120 seconds
Q. How many hours are in 90 min
5400 hr
1.3 hr
.5 hr
1.5 hr
• Question 12
120 seconds
Q. How many hours are in 12 min
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
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
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?
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?
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?
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?
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?
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
\$0.84
\$840
\$8.4
\$0.17
• Question 21
30 seconds
Q. What is the equation for power?
V = IR
P = IV
P = IR
P = I/V
• Question 22
30 seconds
Q. What is the unit of electrical power?
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?
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.

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.

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.

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?
1.25 A
0.8 A
12.5 A
180 A
• Question 28
30 seconds
Q. How many amps are in 800mA?
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?
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?
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?
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?
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