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Physics
| Question | Answer |
|---|---|
| To say that electric charge is conserved is to say that electric charge... a.) may occur in an infinite variety of quantities b.) is a whole number multiple of the charge of one electron c.) can be neither created nor destryed. | C |
| A main difference between gravitational and electric forces is that electrical; forces... a. attract b. repel or attract c. obey the inverse-square law d. ac over shorter distances e. are weaker | b. |
| the electrical forces between charges is strongest when the charges are a. close together b. far apart c. the electrical force is constant everywhere | a. |
| The electrical force between charges depends on the a. magnitude of electrical charges b. separation distance of between electrical charges c. both d. none | c. |
| superconductors are noted for their a. high electric resistance low electric resistance c. absence of electric resistance | c. |
| Rub electrons from your hair with a comb and the comb becomes a. negatively charged b. positively charged | a. |
| an electron and a proton a. attract each other b. repel each other | a. |
| to say that an object is electrically polarized is to say a. it is electrically charged b. is charges have been rearranged c. its internal electric field is zero d. it is only partially conducting e. it is to some degree magnetic | b. |
| a balloon will stick to a wooden wall if he balloon is charged a. negatively b. pointedly c. either d. neither | c. |
| an uncharged pith ball is suspended by a nylon fiber. when a negatively charged rubber rod is brought nearby, without touching it, the pith ball a. becomes charged by induction b. becomes polarized c. is repelled by the rod d. all e. none | either a or b |
| Particle a and particle b interact with each other. Particle a has twice the charge of Particle b. Compared to the force on Particle a , the force on particle b is a. four time as much b. two times as much c. he same d. half as much e. none | c. |
| If you comb your hair and the comb becomes positively charged, then your hair becomes a. positively charged b. negatively charged c. uncharged | b. |
| a conductor differs from an insulator in that a conductor a. has more electrons than protons b. has more protons than electrons c. has more energy than an insulator d. has faster moving molecules e. none of these | e. |
| the direction of an electric field is the direction of the force that it would exert on a. a neutron b. an electron c. an atom d. a proton e. a molecule | d. |
| an electroscope is charged positively as shown by foil leaves that stand apart. As a negative charge is brought close to the electroscope, the leaves a.fall together b. spread apart further c. do not move | a. |
| Charge carriers in a metal are electrons rather than protons because electrons are a. negative b. smaller c. loosely bound d. all e.none | d. |
| The electric field is inside an uncharged metal ball is zero. If the ball is negatively charged, the electric field inside the ball i then a. less than zero b. zero c. greater than zero | b. |
| Two charged particles held close to each other are released. As they move, the force on each particle increases. therefore the particles have a. the same sign b. opposite signs c. not enough information | b. |
| a positive charge and a negative charge held near each other are released. As they move, the force on each particle a. increase b. decrease c. says the same | a. |
| Moving electric charges will interact with a. an electric field b. a magnetic field c. both of these d. none of these | c. |
| an iron rod becomes magnetic when a. positive ions accumulate at the end and negative ions a the other end b. the net spins of its electrons are in the same direction | b. |
| Several paper clips dangle from the north poe of a magnet. The induced pole in the bottom of a. North Pole b. South Pole c. both -no difference really | a. |
| an iron nail is more strongly attracted to the a. North Pole of magnet b. South Pole of a magnet c. both -no difference really | c. |
| Surrounding every moving electron is a. a magnetic field b. an electric field c. both d. none | c. |
| Magnetism is due to the motion of electrons as they a. spin on their axis b. move on the nucleus c. both d. none | c. |
| which pole of a compass points to a South Pole of a magnet? a. north b. south c. both | a. |
| When there is a change in the magnetic field in a closed loop of wire, a. a voltage is induced in the wire b. electromagnetic induction occurs c. current is made to flow in the loop of wire d. all e. none | d. |
Created by:
Empres17