"Electric Power" Electric Power PPT Download (Lesson 1 Electric Power and Simple Calculations)

Description

"Electric Power" Electric Power PPT Download (Lesson 1 Electric Power and Simple Calculations)

Reaching standards and consolidating

1. Multiple choice questions

1. Which of the following statements about electric power and electric power is correct ()

A. The more work done by the current passing through the electrical appliance, the greater the electrical power of the electrical appliance.

B. The smaller the electrical power of the electrical appliance, the less work the current does

C. Both kilowatts and kilowatt hours are units of electrical power.

D. The greater the electrical power of the electrical appliance, the faster the current will do work.

2. The electrical power of a washing machine is 500 W, which means ()

A. The washing machine does 500 W of work in 1 s.

B. 500 J of electrical energy is converted into mechanical energy

C. The electric energy consumed by the washing machine in 1 s is 500 J

D. The work done by the current in 1 s is 500 J/s

3. The electrical energy consumed by A’s electrical appliance in 5 minutes is 1.5×105 J, and the electrical energy consumed by B’s electrical appliance in 1 hour is 0.5 kW·h. Then the relationship between the electrical power of A’s electrical appliance and B’s electrical appliance is ()

A.P A>P B B.P A=P B

C.P A＜P B D.Cannot be compared

4. Xiaogang uses an electric energy meter to measure the electrical power of his household appliances. When only a certain electrical appliance in the circuit works alone, it is measured that the power consumption is 0.15 kW·h in 10 minutes. This electrical appliance may be ()

A. Rice cooker B. Electric fan

C.TV D.Radio

5. Jingjing’s father bought an electric baking pan from the mall. The electric power of the electric baking pan when working is 1200 W. Then the electric baking pan works normally for 1 minute, and the power consumed is ()

A.0.02 kW B.0.02 kW·h

C.1200 J D.7.2×104 W

6. In the circuit shown in Figure 2-K-1, the resistance of resistor R1 is 10 Ω. Close switch S, the reading of ammeter A1 is 0.4 A, the reading of ammeter A2 is 1.2 A, then the power of resistor R2 is ()

A.3.2 W B.1.6 W C.9.6 W D.4.8 W

7.2017·Echeng District End of Period Two light bulbs A and B, their I-U relationship images are shown in Figure 2-K-2. Now two bulbs A and B are connected in series in a circuit. When the voltage across bulb A is 2 V, the total power of the two bulbs is ()

A.2 W B.1.6 W C.1.2 W D.0.8 W

2. Fill in the blanks

8.1 kW·h is the ________ consumed by an electrical appliance with an electric power of ________ when it works normally for 1 hour; 1 kilowatt hour of electricity can supply a 250 W TV set for normal operation ________h.

9. When an electrical appliance works for 2 minutes and consumes 1200 J of electric energy, the electrical power of the electrical appliance is ________.

10. The electrical power of a TV set is 100 W. If it is used for 4 hours a day, the monthly power consumption will be ________kW·h. (Based on 30 days)

11. The ratio of electric energy consumed by dual-purpose electrical appliances A and B is 3:8, and the ratio of power-on time is 3:4, then the ratio of electric power is ________.

12.2017·Dezhou A power bank is a rechargeable lithium polymer battery. Some relevant parameters of a certain power bank are shown in the table below. When the power bank is fully charged, the energy stored is ________J and the output power is ________W.

13. The resistance of a fixed-value resistor R is 10 Ω, and the current passing through it is 0.2 A. Then the electrical power of this resistor is ________W.

14. The voltage across a fixed-value resistor is 6 V. At this time, its electric power is 6 W. Then the resistance of the fixed-value resistor is ________Ω. If the voltage across the fixed-value resistor becomes 3 V, then the electric power of the resistor is ________W.

15. Two resistors are connected in series, R1 = 10 Ω, R2 = 15 Ω, and the power supply voltage is 6 V, then the current is ________A, the electrical power of R1 is ________W, the electrical power of R2 is ________W, and the total power of the circuit is ________W.

Keywords: Free download of PPT courseware for ninth-grade physics from People's Education Edition, download of electrical power PPT, download of electrical power and simple calculation PPT, .PPT format;

For more information about the "Electric Power Electric Power and Simple Calculation" PPT courseware, please click the Electric Power ppt Electric Power and Simple Calculation ppt tag.

"Electrical Power" Electric power PPT download (rated power and actual power in lesson 2):

"Electric Power" Electric Power PPT Download (Lesson 2 Rated Power and Actual Power) Standard Consolidation 1. Multiple Choice Questions 1. Regarding rated power and actual power, which of the following statements is correct ( ) A. Rated power is related to the voltage at which the electrical appliance is working B. Rated power and electricity consumption..

"Electric Power" Electric Power PPT:

"Electric Power" Electric Power PPT Part One Content: Tutorial Design Learning Point 1 Electric Power Experiment: Connect a 24 W energy-saving lamp and a 500 W hair dryer to the home circuit teaching board, and count the times within 1 minute. How many times does the energy meter turntable rotate? Question 1..

"Electric Energy Electric Power" Electric power PPT teaching courseware:

"Electric Energy, Electric Power" Electric Power PPT Teaching Courseware Part One Content: Knowledge Management 1. Electric energy generation: thermal power generation, hydropower generation, wind power generation, solar power generation, etc. Unit: joule (J); kilowatt hour (kWh), also known as degree, 1 kWh = 3.6106J. 2..

File Info

Update Time: 2024-06-24

This template belongs to Physics courseware People's Education Edition Ninth Grade Physics Complete Book industry PPT template

Preview