Which of the following is not an example of charging by friction? Select one: A. sliding over a plastic-covered car seat B. walking across a woolen carpet C. brushing dry heair with a plastic comb D. touching a spoon to a bowl The region surrounding a charged particle in which an electric force is noticeable is called a (an) Select one: A. electric field B. static electricity C. Force of attraction D. magnetic field In order to produce a current in a cell, the terminals must Select one: a. be in a liquid b. have a potential difference c. be exposed to light d. be at two different temperatures When moving, which particle causes electricity? Select one: A. a hydrogen ion B. a hydrogen atom C. an electron D. a proton If two charges attract each other; then Select one: A. the charges must be the same B. both charges must be positive C. both charges must be negative D. the charges must be different In order to produce a current in a cell, the terminals must Select one: A. be at two different temperatures. B. be exposed to light C. be in a liquid D. have a potential difference How does a material acquire a positive electrical charge? Select one: A. by gaining electrons B. by losing electrons C. by gaining protons D. by switching the position of electrons and protons in the atom Two different materials are rubbed against each other and acquire opposite charges when separated. This is an example of charging by Select one: A. interaction B. induction C. friction D. conduction Two objects are attracted to one another. What do you know about the charges of each of the objects? Select one: A. The each have the opposite charge from the other. B. It can not be determined from the information given. Induction can cause attraction with neutral objects. C. They both have the same charge. D. One is neutral while the other has a charge. How do two negative charges interact when they are brought close together? Select one: A. no interaction B. ground C. repel D. attract Which of these is necessary in order to make an electric circuit? Select one: A. a light bulb B. a closed path C. copper wire D. a battery What is the current flowing through a circuit where you have 150 ohms and 120 volts? Select one: A. 0.80 A B. 30 A C. 120 A D. 1.25 A What is the appropriate unit of measure for current? Select one: A. volts B. newtons C. kilowatts D. ampere Electric charge flows from higher to _________to lower _________. Select one: A. voltage, amperage. B. voltage, voltage. C. ohms, voltage D. amperage, amperage. Which type of circuit has only ONE way for electricity to flow? Select one: a. parallel b. series c. open d. closed An electric current does not exist in a(an) Select one: a. open circuit b. closed circuit c. series circuit d. parallel circuit Which of the following devices can help prevent a circuit from overloading? Select one: A. a fuse B. a switch C. a circuit breaker D. both (A) and (C) What is the process of connecting an object to Earth with a conductor called? Select one: A. charging B. draining C. induction D. grounding How many paths can a parallel circuits have for electricity to flow? Select one: A. 2 or more B. 1 C. there is no such thing as a parallel circuit. Electric energy is measured in Select one: A. ohms B. kilowatt-hours C. watts D. electron-hours Electric energy is measured in Select one: A. ohms B. kilowatt-hours C. watts D. electron-hours The property of a material that resists the flow of charged particles through it. Select one: a. electrical resistance b. Voltage c. parallel circuit d. ampere A material that easily allows the flow of electric charge through it is called a (an) Select one: A. semiconductor B. conductor C. insulator D. superconductor Resistance in wires causes electrical energy to be converted to what form of energy? Select one: A. chemical energy B. nuclear energy C. sound D. thermal energy In a circuit that has a voltage of 120 V and a current of 5 A, what wattage with the circuit hold? Select one: A. 115 W B. 600 W C. 24 W D. 125 W On which pair of particles would a force of repulsion occur? Select one: A. electron-proton B. electron-electron C. neutron-neutron D. proton-neutron