Glencoe Science Level Red

Chapter 7: Electricity and Magnetism

Electricity and Magnetism

 1 Which of these does not have an electric charge? Need a Hint? A) electron B) neutron C) proton D) insulator 2 An object is electrically charged if the amounts of positive and negative charge it contains are not _______. Need a Hint? A) negative B) positive C) equal D) increased 3 _______ are materials in which electric charges do not move easily. Need a Hint? A) Insulators B) Conductors C) Circuits D) Metals 4 Lightning occurs when the _______ on a storm cloud causes charging by induction on the ground or another cloud. Need a Hint? A) neutral charge B) positive charge C) static charge D) negative charge 5 Which of these is an example of electric discharge? Need a Hint? A) spark between your hand and the doorknob B) articles of clothing sticking together C) trees D) rubbing your cat's fur with a balloon 6 _______ can prevent damage caused to buildings by lightning strikes. Need a Hint? A) Insulating B) Conducting C) Grounding D) Charging 7 Which of the following causes current to flow in a wire? Need a Hint? A) electric field B) electric circuit C) electric resistance D) magnetic domains 8 Which of the following energy conversions occurs inside a battery? Need a Hint? A) electrical to chemical B) thermal to electrical C) thermal to chemical D) chemical to electrical 9 The measure of how difficult it is for electrons to flow in an object is called the _______. Need a Hint? A) electric circuit B) electric resistance C) magnetic domain D) electric field 10 When a portable radio is playing, the current in the radio is 0.3 A. If the resistance of the radio is 30.0 O, what is the voltage supplied by the radio battery? Need a Hint? A) 12 V B) 9 V C) 6 V D) 15 V 11 Increasing the voltage in a circuit increases which of the following in the circuit? Need a Hint? A) It increases the energy transferred to the circuit. B) It increases the static charge. C) It increases the number of charges. D) It increases the electric resistance. 12 A(n) _______ has only one path for current to follow. Need a Hint? A) parallel circuit B) electric current C) magnetic pole D) series circuit 13 _______ is a measure of the amount of electrical energy transferred by an electric charge as it moves from one point to another in a circuit. Need a Hint? A) Current B) Charge C) Electric circuit D) Voltage 14 Which of these is true about a permanent magnet? Need a Hint? A) It contains an iron core. B) Preservation C) It contains a current-carrying wire. D) Its domains are lined up. 15 What surrounds an electric current? Need a Hint? A) magnetic field B) electromagnet C) charge D) electric circuit 16 A(n) _______ is made of a current-carrying wire wrapped around an iron core. Need a Hint? A) electric current B) insulator C) conductor D) electromagnet 17 Which of the following does not describe the magnetic force between two magnets? Need a Hint? A) The like poles attract. B) The like poles repel. C) It decreases as the magnets move apart. D) The unlike poles attract. 18 A group of atoms that have their magnetic poles pointing in the same direction is called a(n) _______. Need a Hint? A) electric current B) electromagnet C) magnetic domain D) voltage 19 Which of these does a simple generator rotate to produce current? Need a Hint? A) a battery B) a magnet C) a domain D) a wire loop