… · Web viewStudy the following chart. ... Write the word or words that best complete each...
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QUIZ 12 1. A switch controls ___ through a circuit. 2. The buildup of electrical charges on an object is called ___. 3. A coil of wire wrapped around an iron core can act as a(n) ___. 4. Materials that let charges flow through them easily are ___. 5. Materials that do not let charges flow through them easily are ___. 6. Electric current that rapidly changes directions is called ___. 7. An object in a circuit that resists the flow of electrons is called a(n) . 8. A device that changes motion into electrical energy is a(n) ___. 9. A(n) ___ is formed when an electric current passes through an unbroken path of conductors. 10. The directions of the magnetic forces around a magnet make up the ___. A. alternating current B. circuit C. conductors D. electric current E. electromagnet F. generator G. insulators H. magnetic field I. resistor J. static electricity QUIZ 13 Circle the letter of the best answer for each question. 1. Which of these is an example of static electricity? A thunder B lightning C clouds D wind 2. The poles of a magnet have the strongest attraction when they are A unlike and close together. B alike and close together. C alike and far apart. D unlike and far apart. 3. Electromagnets are found in A electric motors, speakers, generators, and compasses. B microphones, generators, magnetic fields, and electric motors. C generators, electric motors, microphones, and speakers. D speakers, iron cores, electric motors, and generators. 14. What unit is used to measure resistance? A joules B meters C ohms D volts 15. An electric circuit that produces a magnetic field is called a(n) A current. B magnet. C coil. D electromagnet. QUIZ 14 1. Which of these is a good conductor? A copper B plastic C rubber D wood 2. Study the following chart. Which event does the chart describe? A electric shock B lightning strike C thunderstorm D tornado 3. Which charge does an object have when positive and negative charges are equal? A static B negative C neutral D positive 4. Why are negative charges more likely to build up when objects are rubbed together? A Negative particles flow more easily. B Positive particles do move. C There are more negative charges. D The two objects both QUIZ 15 Circle the letter of the best answer for each question. 1. Resistance to electricity is measured in A watts. B amps. C volts. D ohms. 2. A type of circuit that has more than one conductive path is a
Transcript of … · Web viewStudy the following chart. ... Write the word or words that best complete each...
QUIZ 121. A switch controls ___ through a circuit.2. The buildup of electrical charges on an object is called ___.3. A coil of wire wrapped around an iron core can act as a(n) ___.4. Materials that let charges flow through them easily are ___.5. Materials that do not let charges flow through them easily are ___.6. Electric current that rapidly changes directions is called ___.7. An object in a circuit that resists the flow of electrons is called a(n) .8. A device that changes motion into electrical energy is a(n) ___.9. A(n) ___ is formed when an electric current passes through an unbroken path of conductors.10. The directions of the magnetic forces around a magnet make up the ___.
A. alternating currentB. circuitC. conductorsD. electric currentE. electromagnetF. generatorG. insulatorsH. magnetic fieldI. resistorJ. static electricity
QUIZ 13
Circle the letter of the best answer for each question.1. Which of these is an example of static electricity?A thunderB lightningC cloudsD wind2. The poles of a magnet have the strongest attraction when they areA unlike and close together.B alike and close together.C alike and far apart.D unlike and far apart.3. Electromagnets are found inA electric motors, speakers, generators, and compasses.B microphones, generators, magnetic fields, and electric motors.C generators, electric motors, microphones, and speakers.D speakers, iron cores, electric motors, and generators.14. What unit is used to measure resistance?A joulesB metersC ohmsD volts15. An electric circuit that produces a magnetic field is called a(n)
A current.B magnet.C coil.D electromagnet.
QUIZ 14
1. Which of these is a good conductor?A copperB plasticC rubberD wood2. Study the following chart.
Which event does the chart describe?A electric shockB lightning strikeC thunderstormD tornado
3. Which charge does an object have when positive and negative charges are equal?A staticB negativeC neutralD positive4. Why are negative charges more likely to build up when objects are rubbed together?A Negative particles flow more easily.B Positive particles do move.C There are more negative charges.D The two objects both
QUIZ 15
Circle the letter of the best answer for each question.1. Resistance to electricity is measured inA watts.B amps.C volts.D ohms.2. A type of circuit that has more than one conductive path is aA parallel circuit.B series circuit.C short circuit.D switch.3. Which unit is used to measure electrical energy?
A wattB ampC voltD ohm4. A wire that breaks if too much current flows through it is called a(n)A switch.B fuse.C surge protector.D ampere.
QUIZ 16
1. An electromagnet works becauseA moving electrons generate magnetic forces.B alternating current completes a circuit.C a generator is powerful.D protons flow through copper wire.2. An electromagnet is different from a permanent magnet because an electromagnetA is magnetic.B can push and pull.C can attract some metals.D can turn on and off.3. A device that creates electric current by spinning an electric coil between the poles of a powerful magnet is a(n)A electric motor.B electromagnet.C generator.D maglev train.4. A device that lowers the voltage of electricity is calledA a resistor.B a turbine.C a transformerD a generator.
QUIZ 17Write the word or words that best complete each sentence in the spaces below. Words may be used only once.1. The flow of electrons through a circuit creates ___.2. A light bulb is an example of a(n) ___.3. When objects rub together and electrons are transferred from one object to the other, ___ forms.4. Electric current that rapidly changes directions is called ___.5. For electricity to flow, it must follow a complete path called a(n) ___.6. Wrapping a coil of wire around a metal rod is a simple way to make a(n) ___.7. Metals such as copper and silver are good ___ .8. Materials such as wood and plastic are good ___.9. Two metals that can push or pull each other have ___.10. A(n) converts mechanical energy into electricity.A. alternating currentB. circuit
C. conductorsD. electric currentE. electromagnetF. generatorG. insulatorsH. magnetismI. resistorJ. static electricity
Circle the letter of the best answer for each question.
QUIZ 1811. A short circuit results whenA voltage is too low.B current has little resistance.
C a transformer slows down.D a motor turns on.12. What unit is used to measure electrical energy?A ohmsB joulesC voltsD meters13. When a permanent magnet is placed near a piece of metal,A the permanent reverses poles.B the piece of metal takes away the magnetic field.C the piece of metal becomes a temporary magnet.
D the permanent magnet becomes a temporary magnet.14. All of the following are examples of devices that use electromagnets exceptA a doorbellB a refrigerator magnetC a television setD an electric motor15. Electrical energy that reaches homes and factories is first produced inA an electrical charge.B a production station.C a power plant.D a transformer.
