University Physical Science

Ace your homework & exams now with Quizwiz!

When a 10 V battery is connected to a resistor, 2 A of current flow in the resistor. What is the resistor's value?

5 ohms

Which of these particles has an electrical charge?

All of the above (proton, electron, and ion)

The primary purpose of a lightning rod is to

discharge the structure to which it is attached

Two charges separated by 1 m exerted a 1 N on each other. If the charges are pulled to a 3 m separation distance, the force on each charge will be

.11 N

An electron is pushed into an electric field where it acquires a 1 V electrical potential. If two electrons are pushed the same distance into the same electric field, the electrical potential of the two electrons is

1 V

If you use 10 J of work to push a coulomb of charge into an electric field, its voltage with respect to is starting position is

10 V

How much current is in a 120 volt line at 1200 watts?

10 amperes

How much current is in a 1200 watt device operating on 20 volts?

10 amperes

A 10-ohm resistor is connected to a 120-volt power supply. The current in the resistor

12 A

The current though a 10 ohm resistor connected to a 120 V power supply is

12 A

A coulomb of charge that passes through a 12 volt battery is given

12 joules

A certain light bulb with a resistance of 95 ohms is labeled 150 W. This bulb was designated for use in a

120 V circuit

Two charges separated by 1 m exert a 1 N force on each other. if the charges are pushed to .25 m separation, the force on each charge will be

16 N

What is the power rating of a lamp connected to a 12-V source when it carries 1.5A?

18 W

When a pair of 1 ohm resistors are connected in series, their combined resistance is

2 ohms and when in parallel, 1/2 ohms

When a battery does 24 J of work on a 10 C of charge, the voltage it supplies is

2.4 V

A 4 ohm resistor is connected in parallel with a 6 ohm resistor. This combination produces an equivalent resistance of

2.4 ohms

If a neutral atom has 22 protons in its nucleus, the number of surrounding electrons is

22

The current through two identical light bulbs connected in series is 0.25 A. The voltage across both bulbs is 110 V. The resistance of a single bulb is

220 ohms

A 120 volt line carries 20 amperes. The power expended is

2400 watts

The electrical force on a 2 C charge is 60 N. What is the value of the electric field at the place where the charge is located?

30 N/C

Two charges separated by 1 m exert a 1 N force on each other. If the magnitude of each charge is doubled, the force on each charge is

4 N

A coulomb of charge that passes through a 6 V battery is given

6 joules

A 60 W light bulb and a 100 W light bulb are each rate at 120 V. Which light bulb has a larger resistance?

60 W bulb

Which statement is correct?

Charge flows in a current.

Which of these statements is true?

Electric current is a flow of electric charge

What is the rate at which electric energy is converted to another form or transferred to another device?

Electric power

Which force binds atoms together to form molecules?

Electrical

Which is the predominant carrier of charge in copper wire?

Electron

Two charged particles repel each other with a force F. If the charge of one of the particles is doubled and the distance between them is also doubled, then the force will be

F/2

Which of these rules is basic to all of physics?

The conservation of energy and the conservation of charge (all of the above)

In a common dc circuit, electrons move at speeds of

a fraction of a cm per second

The unit of electric charge, the coulomb, is the charge on

a specific large number of electrons

Superconductros are noted for their

absence of electric resistance

When you buy a water pipe in a hardware store, the water isn't included. When you buy a copper wire, electrons are

already in the wire

Charge carriers in a metal are electrons rather than protons because electrons

are loosely bound

An electron and proton

attract each other

When we say charge is conserved, we mean that charge can only

be transferred from one place to another

Charges on the plates of a charged capacitor reside on the surfaces

between the capacitor plates

To say that electric charge is conserved is to say that electric charge

can neither be created nor destroyed

An ampere is a unit of electrical

charge

The electrical force between charges is strongest when the charges are

close together

The rate at which electrons flow in a wire is measured by

current

When you double the voltage in a simple electric current, you double the

current

When you increase the potential energy of a charged particle, you increase its ability to

do work

A balloon will stick to a wooden wall if the balloon is charged

either positively or negatively

Electric potential, measured in volts, is the ratio of electric energy to amount of

electric charge

Every proton in the universe is surrounded by its own

electric field and gravitational field

The fundamental force underlying all chemical reactions is

electrical

Two protons attract each other gravitationally and repel each other electrically. By far, the greater is the

electrical repulsion

When we say an appliance "uses up" electricity, we really are saying that

electron kinetic energy is changed into heat

In an electrically neutral atom, the number of protons in the nucleus is equal to the number of

electrons that surround the nucleus

Electric potential, measured in volts, is a ratio of

energy to charge

The strength of an electric field is measured by the force

exerted on a charged particle in the field

According to Coulomb's law, a pair of particles that are placed twice as close to each other will experience forces that are

four times as strong

According to Coulomb's law, doubling both charges of a pair of particles will result in a force between them that is

four times as strong

Alternating current is normally produced by a

generator

Electric potential energy is measured in joules. Electric potential, on the other hand (electric potential energy per charge) is measured

in volts

As more lamps are put into a parallel circuit, the overall current in the power source

increases

Heat a copper wire and its electric resistance

increases

To say that electric charge is quantized is to say that the charge on an object

is a whole-number multiple of the charge of one electron

To say that an object is electrically polarized is to say

it charges have been rearranged

When two identical lamps in a circuit are connected in a parallel, the total resistance is

less than the resistance of either lamp

When two identical lamps in a circuit are connected in parallel, the total resistance is

less than the resistance of either lamp

Which is more dangerous, touching a faulty 110 V light fixture or a Van de Graaff generator charged to 100,000 V?

light fixture

The electrical force between charges depends on the

magnitude of electric charges and the separation distance between electric charges

When two lamps are connected in a series to a battery, the electrical resistance that the battery senses is

more resistance of either lamp

A 10 ohm resistor carries 10 amperes. The voltage across the resistor is

more than 10 V

If you comb your hair and the comb becomes positively charged, then your hair becomes

negatively charged

Rub electrons from your hair with a comb and the comb becomes

negatively charged

The electric field inside the dome of a Van de Graaff generator

neither of these

To say that electric charge is conserved means that no case has ever been found where

net charge has been created or destroyed

The electric field around an isolated electron has a certain strength 1 cm from the electron. The electric field strength 2 cm from the electron is

none of the above

A conductor differs from an insulator in that a conductor

none of these

The current in a 100 W bulb connected to a 120 V source is

none of these

The net charge on a charge capacitor

none of these-the net charge is zero

A wire carrying a current is normally charged

not at all

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 becomes

poliarized

When you brush your hair and scrape electrons from your hair, the charge of your hair is

positive

Strip electrons from an atom and the atom becomes a

positive ion

A negatively charged rod is brought near a metal can that rests on a wood table. You touch the opposite side of the can momentarily with your finger. The can is then

positively charged

A balloon will stick to a wooden wall if the balloon is charged either

positively or negatively

When you do work on an electrically charged particle, you change the particle's

potential energy

The purpose of a safety fuse is to

prevent overloading in a circuit

The direction of an electric field is the direction of the force that it would exert on a

proton

The direction of an electric field, by convention, is the direction of force that the field would exert on a

proton

A positive ion has more

protons than electrons

When the distance between two charges is halved, the electrical force between the charge

quadruples

When the distance between two charges is halved, the electrical force between the charges

quadruples

A main difference between gravitational and electric forces is that electoral forces

repel or attract

The main difference between gravitational and electric forces is that electrical forces

repel or attract

When a negatively charged balloon is placed against a non-conducting wall, negative charges in the wall are

repelled from the balloon

A difference between electric forces and gravitational forces is that electoral forces include

repulsive interactions

A transistor is an example of a

semiconductor

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

the same

Two lamps, one with a thick filament and one with a thin filament, are connected in a parallel to a battery. The current is largest in the lamp with the

thick filament

A major difference between DC and AC in circuits is the

way charges flow

When a car is struck by lightening, the resulting electric field inside the car is

zero


Related study sets

CNT150:Chanpter 8: IPv6 GUA Assignment

View Set

Social Psychology Exam 3- Short Answers Q's

View Set

confident driving instruction WA (for sure on tests)

View Set

Nursing Care of the Child With an Alteration in Cellular Regulation/Hematologic or Neoplastic Disorder

View Set

Intersection of a column and a row.

View Set