# phys

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```					1.In his famous experiment of the late 1700s, Charles Coulomb

A) repeated Benjamin Franklin's kite and lightning demonstration.
B) measured static electricity using a piece of amber.
C) proved Newton's three laws of motion.
D) measured the force of the electric charge in objects.
E) showed that muscle contractions are both electric and chemical.

2.Which of the following can produce magnetic fields?

A) gravitational force
B) static electrical force
C) moving electrical charges
D) winding a coil of wire
E) rubbing amber against a magnet

3.Mary Shelley's Frankenstein was inspired by some experiments and demonstrations in electricity bas

A) Galvani's research.
B) Voltaire's research.
C) the writings of Alessandro Volta.
D) Benjamin Franklin's research.
E) William Gilbert's compass.

4.Every electrical circuit contains

A) an electromagnet.
B) an electrical conductor.
C) an electric switch.
D) a circuit breaker.
E) a lighting device.

5.When you cut a magnet in half you get

A) two monopole magnets.
B) two magnets with only north poles.
C) two dipole magnets.
D) one magnetic dipole.
E) one isolated south pole and one isolated north pole.

6.How much power is consumed per hour by an electric stove drawing 40 amps? (Note - This electric
A) 5.75 watts/hour
B) 345 watts/hour
C) 9.2 kilowatts/hour
D) 5.75 kilowatts/hour
E) 9200 kilowatts/hour

7.Which sound wave frequency is outside the range of a human's ability to detect?

A) 20 Hz
B) 200 Hz
C) 2000 Hz
D) 20000 Hz
E) 200000 Hz

A) has shorter wavelengths.
B) has longer wavelengths.
C) is a faster wave.
D) is a slower wave.
E) is visible to the human eye.
9.Which wave does not need a medium?

A) ocean wave
B) sound wave
C) X-ray
D) seismic wave
E) ripples on water

10.The fundamental difference between electromagnetic waves and other types of waves is that elect

A) move more slowly than all other types of waves.
B) are invisible regardless of wavelength.
C) do not experience constructive or destructive interference.
D) transfer energy without transferring mass.
E) all have the same wavelength.

11.Evidence for the theory that an atom is mostly space was based on research by

A) Joseph John Thomson.
B) Niels Bohr.
C) John Dalton.
D) Ernest Rutherford.
E) Daniel Bernoulli

12.Electrons in the Bohr atom shift to a higher energy level by

A) absorbing the energy of light or heat.
B) reflecting the energy of heat or light.
C) emitting a photon.
D) radiating an electromagnetic wave.
E) stubbornly refusing to change energy states.

13.All elements in any column in the periodic table of elements

A) have very little in common.
B) form a compound known as a salt.
C) are alkaline earth metals.
D) have similar chemical properties.
E) are noble gases.

14.Mendeleev's periodic table was organized according to rules of scientific method. Which statement

A) The periodic table made predictions that could be tested.
B) Only scientists could understand the periodic table.
C) Information that refuted Mendeleev's hypothesis was ignored.
D) Mendeleev's listed the elements alphabetically.
E) The periodic table has not changed in 100 years.

15.Metallic bonds create materials with properties that make them

A) stiff and viscous.
B) malleable.
C) brittle.
D) good insulators.
E) soft and pliable.

16.To save money, you bought a tougher cut of meat. Which of the following processes will you be us

A) distillation
B) condensation reaction
C) precipitation
D) dehydration synthesis
E) depolymerization

17.Which makes the best electrical conductor?

A) covalent bonds
B) ionic bonds
C) hydrogen bonds
D) metallic bonds
E) polymers

18.Exothermic and endothermic chemical reactions differ in that

A) energy is given off only in exothermic reactions.
B) energy is given off only in endothermic reactions.
C) the total energy in all involved electrons is the same before and after an exothermic reaction.
D) the total energy in all involved electrons is the same before and after an endothermic reaction.
E) only exothermic reactions can be observed in everyday life.

19.A superconductor can be described as having electrons that

A) are bound to individual atoms.
B) are free to move randomly around the material, colliding with atoms from time to time.
C) combine with matter in a way that changes the material.
D) can move freely without losing energy.
E) bind together so tightly they do not move.

20.The information in a computer is stored and manipulated by

A) transistors.
B) bytes.
C) service providers.
D) doping.
E) DVDs.

21.A silicon semiconductor will transmit electrical current

A) by electrons and holes.
B) only by electrons.
C) only by holes between electrons.
D) only if the silicon is doped with phosphorous
E) when the material is frozen.

22.Which of the following is a good conductor?

A) rubber
B) wood
C) plastic
D) ocean water
E) glass

23.In order for a computer to become more like a human brain, it would need
A) to have more interconnections.
B) to perform operations only in sequential steps.
C) to operate without using electrical signals.
D) to have a smaller central processing unit (CPU).
E) to have a more reliable source of energy.

24.Which of the following has the least information content?

A) a printed page with 500 words
B) one second of a telephone conversation
C) one color picture on a television screen
D) digital 3-D graphic file
E) one second of a DVD audio and video recording

25.Semiconducting diodes are used in solar photovoltaic cells because

A) electrons in semiconductors are loosely bound to atoms, and therefore can be easily transmitted
B) these diodes contain dendrites and therefore are able to transmit electricity quickly.
C) diodes are made of naturally occurring magnets
D) semiconducting diodes are good insulators.
E) diodes biodegrade easily.

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