Title: Quizzer
Course: Physics copy 1

Q: Of the following quantities, the one that is vector in character is electric_____.
- charge.
- field.
- energy.
- potential difference
A: field.

Q: The electric field at a point in space is equal in magnitude to
- the potential difference there.
- the electric charge there
- the force a charge of one coulomb would experience there.
- the force an electron would experience there.
A: the force a charge of one coulomb would experience there.

Q: The magnitude of the electric field in the region between two parallel oppositely charged metal plates is
- zero.
- uniform throughout the region.
- greatest near the positive plate
- greatest near the negative plate
A: uniform throughout the region.

Q: From its definition, the unit of electric field E is the N/C. An equivalent unit of E is the
- Vm.
- V(m^2).
- V/m.
- V/m^2.
A: V/m.

Q: Electric lines of force
- exist everywhere in equal strength.
- exist only in the immediate vicinity of electric charges.
- exist only when both positive and negative charges are near each other
- are imaginary.
A: are imaginary.

Q: Ten million electrons are placed on a solid copper sphere.
- uniformly distributed on the sphere's surface.
- uniformly distributed in the sphere's interior.
- concentrated at the center of the sphere.
- concentrated at the bottom of the sphere.
A: uniformly distributed on the sphere's surface.

Q: A system of two charges has a positive potential energy. This signifies that
- both charges are positive.
- both charges are negative.
- both charges are positive or both are negative
- one charge is positive and the other is negative.
A: both charges are positive or both are negative

Q: The "electron volt" or voltage of 1 electron is a unit of_____.
- charge.
- potential difference.
- energy.
- momentum
A: energy.

Q: The force on an electron in an electric field of 200 V/m is
- 8 x 10^-22 N.
- 3.2 x 10^-21 N.
- 3.2 x 10^-17 N.
- 6.4 x 10^-15 N.
A: 3.2 x 10^-17 N.

Q: The electric field 2 cm from a certain charge has magnitude of 105 V/m. The value of E 1 cm from the charge is
- 2.5 x 10^4 V/m.
- 5 x 10^4 V/m.
- 2 x 10^5 V/m.
- 420 V/m.
A: 5 x 10^4 V/m.

Q: An electric field of magnitude 200 V/m can be produced by applying a potential difference of 10 V to a pair of parallel plates separated by
- 2 cm.
- 5 cm.
- 20 m.
- 2000 m.
A: 5 cm.

Q: A charge of 10<sup>-10</sup>C between two parallel metal plates 1 cm apart experiences a force of 10^-5 N. The potential difference between the plates is
- 10^-5 V.
- 10 V.
- 10^3 V.
- 10^5 V.
A: 10^3 V.

Q: In charging a certain storage battery, a total of 2 x 10^5 C is transferred from one set of electrodes to another. The potential difference between the electrodes is 12 V. The energy stored in the battery is
- 1. 7 x 10^4 J.
- 2.4 x 10^4 J.
- 2.4 x 10^7 J.
- 2.9 x 10^4 J.
A: 2.4 x 10^4 J.

Q: The rest energy of the proton is 938 MeV. which is equal to
- 1.67 x 10^-27 J.
- 1.50 x 10^-10 J.
- 1.04 x 10^7 J.
- 2.9 x 10^7 J.
A: 1.50 x 10^-10 J.

Q: An electron whose speed is 10^7 m/s has an energy of
- .46 x 10 EeV. E is is exa
- 160 eV
- 284 eV.
- 568 eV.
A: 284 eV.

Q: A negative electric charge
- interacts only with positive charges.
- interacts only with negative charges.
- interacts with both positive and negative charges.
- may or may not interact depending on the circumstances.
A: interacts with both positive and negative charges.

Q: Coulomb's law belongs in the same general category as
- the law of gravitation.
- the laws of motion.
- the laws of thermodynamics.
- the conservation principles of mechanics.
A: the law of gravitation.

Q: If 10 000 electrons are removed from a neutral pith ball, the charge is
- 1.6 x 10^-15 C.
- 1.6 x 10^-23 C.
- -1.6 x 10^-15 C.
- -1.6 x 10^-23 C.
A: 1.6 x 10^-15 C.

Q: Two charges of +Q are 1 cm apart. If one the charges is replaced by -Q, the magnitude of force between them is
- zero
- smaller
- the same
- larger
A: the same

Q: Which of the following statements is not true?
- Protons are positively charged.
- The proton mass is greater than the electron mass.
- The proton mass is almost the same as the neutron mass.
- The protons in an atom circulate around its nucleus.
A: The protons in an atom circulate around its nucleus.

Q: In Coulomb's law the value of k
- is the same under all circumstances.
- depends on the medium the charges are located in.
- is different for positive and negative charges.
- has the numerical value of 1.6 x 10^-16 C.
A: is the same under all circumstances.

Q: An alpha particle (He nucleus) has
- a neutral charge.
- two protons, two electrons and two neutrons.
- has a mass of 4 amu.
- has a charge of 6.4 x 10^-19 C.
A: has a mass of 4 amu.

Q: Electric forces are not significant in planetary orbits because
- they are much weaker than gravitiational forces.
- they can not travel through a vacuum.
- both the planets and the sun are basically neutral.
- distance affects electric forces more than gravitational forces.
A: both the planets and the sun are basically neutral.

Q: An object can be charged by
- contact with another charged object.
- induction.
- rubbing with a different material.
- all of the above.
A: all of the above.

Q: Two electric forces, each of 1 nN, act on an object. The magnitude of the net electric force on that object must be
- 2 nN.
- 0 nN.
- between 0 and 1 nN.
- between 0 and 2 nN.
A: between 0 and 2 nN.

Q: The symbol used to indicate electric potential is _____.
A: V

Q: It takes _____ work to move two electrons closer together at a constant speed.
A: positive

Q: It takes _____ work to move an electron and a proton closer together at a constant speed.
A: negative

Q: The letter used to indicate the amount of electric charge is _____.
A: Q / q

Q: A balloon is rubbed on fur and the balloon becomes positive. Which type of particle moved?
A: electron