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the main load in an electric range is found...

a. at the electrical outlet

b. at the on/off switch

c. inside the oven

d. in the heating element

e. in the electrical cord

which of the following is false about electrical resistance?

a. resistance in metals increase as temperature increases

b. it results in the generation of heat

c. it results from the collision of electrons with the ions in a metallic conductor

d. it is equal to the voltage divided by the current passing through a material

e. all of the above are true statements

two charged particles are brought near each other and released. they then rapidly move away from each other. The electrical force is the only force of consequence that acts on them. The particles...

a. are both positively charged

b. are both negatively charged

c. one is positive the other negative

d. any one of the above depending on the strength of the charges

e. either a or b

a battery powered lamp with a resistance of 40 ohms draws 0.3 amps of current when it is used. What is the voltage of the battery that powers this lamp?

a. 120 volts

b. 18 watts

c. 24 volts

d. 12 volts

e. not enough information to tell

every electrical circuit consists of......

a. an energy source, a closed conducting path, and a load

b. a copper wire

c. a closed conducting path only

d. moving protons

e. none of above

when an electric charge moves through a magnetic field.........

a. it path remains unaffected by the field

b. a force is exerted on the moving charge by the field

c. the law of conservation of energy is violated

d. all above

e. a and b only

the electric potential is to resistance as......

a. volt is to ohm

b. volt is to amp

c. volt is to watt

d. volt is to flow rate

e. volt is to power

what is the total power and the resistive power lost to heat in a circuit that has a voltage of 200 volts and a current of 5 amps?

a. 40 watts

b. 60 watts

c. 200 watts

d. 0.0075 watts

e. 1000 watts

the main load in an electric range is found

a. at the electrical outlet

b. at the on/off switch

c. inside oven

d. in the heating element

e. in electrical cord

the pressure in a city water pipe is to ---------------- as the diameter of the pipe is to --------------------

a. heat, voltage

b. current, resistance

c. voltage. resistance

d. voltage, a circuit

e. resistance, voltage

one amp of current equals

a. 1 ohm of current per second

b. 100 ohms of charge per second

c. 1 coulomb of charge per second

d. a and c

e. none of above

if the distance between two point charges is tripled, the electrical force between them

a. triples

b. is one third the original strength

c. decreases by a factor of six

d. decreases by a factor of 9

e. the answer cannot be determined with the information given.

many objects in the universe are neutrally charged because

a. there are not many subatomic particles that are charged

b. neutrons are so prevalent in the nucleus

c. protons and electrons tend to cancel each other out

d. neutrons are able to neutralize unbalanced charges outside the nucleus

e. gravity suppresses the electrical force, and as a result we do not see the effects of the electrical force

how does the electrical force differ from the gravitational force?

a. the gravitational force is stronger than the electrical force

b. gravity is only an attractive force, while the electrical force can be either attractive or repulsive

c. an electric force can exhibit shielding while gravity can not be shielded

d. all of above

e. b and c only

which person listed below first contributed to a scientific understanding of modern atomic theory?

a. Democritus

b. john Dalton

james clerk Maxwell

d. francis crick

e. albert einstein

which person listed below first contributed to a scientific understanding of modern atomic theory?

a. Democritus

b. john Dalton

james clerk Maxwell

d. francis crick

e. albert einstein

The main difference between compounds and mixtures is......

a. compounds cost more than mixtures

b. all mixtures include some of the heavy metals

c. mixtures are formed from the elements in specific proportions

d. most compounds are highly reactive

e. mixtures are not chemically bonded

Temperature ....

a. and heat are the same thing to a physicist

b. is the same thing as the transfer of energy between two objects

c. is related to the speed at which the atoms and molecules in a substance are moving.

d. all of above

e. a and c only

thermometers ...

a. rely on materials that expand when heated and contract when cooled.

b. like an old mercury thermometer rely on the collisions between molecules in the object whose temperature is to be measure with the molecules in the thermometer itself

c. like Galileo's relied on the change in density of a fluid with temperature, in combination with the buoyancy of objects that float in the liquid.

d. all above

e. a and c only

which of the following is true about the temperature known as absolute zero?

a. it is -273 degrees Celsius

b. it is the temperature at which it is impossible to extract any energy at all from the vibrations of atoms or molecules

c. it is temperature routinely achieved in advanced laboratories

d. all of above

e. a and b only