* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Read Chapter 1 in the textbook (pages 4 – 21)
Electrical resistivity and conductivity wikipedia , lookup
Potential energy wikipedia , lookup
Hall effect wikipedia , lookup
Eddy current wikipedia , lookup
Insulator (electricity) wikipedia , lookup
Electron mobility wikipedia , lookup
Multiferroics wikipedia , lookup
Maxwell's equations wikipedia , lookup
Faraday paradox wikipedia , lookup
Static electricity wikipedia , lookup
History of electromagnetic theory wikipedia , lookup
History of electrochemistry wikipedia , lookup
Electromagnetism wikipedia , lookup
Electric machine wikipedia , lookup
Lorentz force wikipedia , lookup
Electrocommunication wikipedia , lookup
Electroactive polymers wikipedia , lookup
Electrical injury wikipedia , lookup
Electric charge wikipedia , lookup
Electromotive force wikipedia , lookup
Electric current wikipedia , lookup
Electromagnetic field wikipedia , lookup
Name: ________________________________________ Block: _____ Date: _____/_____/_____ CONCEPTUAL PHYSICS Chapter 33 Study Guide: Electric Fields & Potential MULTIPLE CHOICE Choose a response for each item in this section. Write your response on the line provided. _____1. An electric field has _____. a. direction b. magnitude c. velocity d. both (a) and (b) _____2. Every proton in the universe is surrounded by its own _____. a. gravitational field c. atmosphere b. electric field d. both (a) and (b) _____3. The direction of electric field lines shows the _____. a. direction of the force on a positive charge c. strength of the electric field b. size of the electric field d. all of the above _____4. The electric field inside a charged conductor is _____. a. always positive c. zero b. always negative d. opposite of the charge on the conductor _____5. Electric potential energy of a charged object is a result of its _____. a. momentum c. mass b. location d. velocity _____6. When an electron is moved near a negatively charged sphere, its potential energy increases. The reason this happens is because _____. a. opposite charges attract c. work is done against an electric field b. like charges repel d. all of the above _____7. If two protons are held closely together, when they are released they will _____. a. accelerate toward each other c. remain motionless b. accelerate away from each other d. move away from each other at a constant speed _____8. Electric potential is _____. a. electric potential energy divided by charge b. measured in joules per coulomb c. measured in volts d. all of the above _____9. In a uniform electric field, the field lines will _____. a. get closer together c. appear parallel and equally spaced b. get further apart d. point in random directions _____10. The electric field around an electron _____ if the distance from the electron is doubled. a. is half as much c. stays the same b. is twice as much d. is one-fourth as much 1 Name: ________________________________________ Block: _____ Date: _____/_____/_____ CONCEPTUAL PHYSICS SHORT ANSWERS Respond to each item in this section using complete sentences, unless directed otherwise. Record your response on the lines or in the space provided. 1. Draw two circles and label them as positive and negative by placing the appropriate sign inside of each. Sketch the field lines between the charges using a minimum of five lines. Use arrows to indicate the direction of the electric field. 2. How can electric field lines help determine the relative strength at different regions within an electric field? ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ 3. Compare electrical potential energy to gravitational potential energy. How are they similar? How are they different? ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ ________________________________________________________________________________________ 2 Name: ________________________________________ Block: _____ Date: _____/_____/_____ CONCEPTUAL PHYSICS CALCULATIONS Problems in this section require a numerical response. Be sure to include the appropriate unit with each response. Write your response on the line provided. 1. 100,000 electrons are removed from a neutral plastic ball. Calculate the magnitude of the charge on the ball. 2. What is the force exerted on a 3.2 C charge in an electric field of 2.4 106 N/C? 3. An electron experiences a force of 3.5 10– 6 N. Calculate the force of the electric field surrounding the electron. 4. A Van de Graaff generator is switched on and acquires 0.003 C of charge. Calculate the electric field strength 0.5 m away from the generator. 3