Module 12

Question 1

Photon:

Answer 1

A small “package” of light that acts like a particle.

Question 2

Charging by conduction:

Answer 2

Charging an object by allowing it to come into contact with an object that already has and electrical charge.

Question 3

Charging by Induction:

Answer 3

Charging an object with out direct contact between the object and a charge.

Question 4

Electrical current:

Answer 4

the amount of charge that travels past a fixed point in an electric circuit each second

Question 5

Conventional current

Answer 5

current that flows from the positive side of the battery to the negative side. this is the way current is drawn in circuit diagrams. even though it is wrong.

Question 6

Resistance

Answer 6

the ability of a material to impede the flow of charge.

Question 7

Open circuit

Answer 7

a circuit that does not have a complete connection between the 2 sides of the power source. As a result, current foes not flow.

Question 8

For the following situations use a solid arrow to draw the force exerted by the circle with the solid line. Use a dashed arrow to draw the force exerted by the circle with a dashed line.
a. - + b. - -

Answer 8

An arrow from the negative electron to the positive electron and arrows away from the other negative electron

Question 9

The force between the south pole of a magnet and the north pole of another magnet is measured, If the Distance between the poles is increased by a factor of 3, how foes the new force compare to the old one? is the force attractive or repulsive

Answer 9

increased by 3 (divided by the square) 3squared 9

the force is divided by 9 attractive

Question 10

2 charged particles are placed 10 cm from each other, and the resulting force is measured. The charge on object 1 is then doubled, and the charge on object id left the same. Also, the distance between the objects is reduced to 5 cm. How does the new force compare to the old force?

Answer 10

it is 8 times stronger ( divided by 2 and multiplied by 4 = 8)

Question 11

What causes the electromagnetic force?

Answer 11

The exchange of photons

Question 12

Why don’t charged particles glow?

Answer 12

because the photons they emit are not visible to humans

Question 13

If you were to use a positively charged rod to charge and object by induction, what charge would the object have.?

Answer 13

A negative charge

Question 14

If you were to use a positively charged rod to charge and object by conduction, what charge would the object have.?

Answer 14

A positive charge

Question 15

An electrical circuit uses a large Voltage but a small current. Is the energy of each electron high or low? Are there many electrons flowing through the circuit, or are there few? Is the circuit Dangerous?

Answer 15

High few yes

Question 16

Under what conditions is an is and electrical circuit reasonably safe?

Answer 16

when the voltage and the current is low.

Question 17

Draw the conventional current flow in the following circuit.

Answer 17

and arrow from the positive side (aka the long side) to the negative side (aka the short side).

Question 18

What is wrong with conventional current?

Answer 18

conventional current assumes that electricity is the flow of positive charges.

Question 19

You have 2 wires. 1 is long, and the other is short. Other than that, they are identical. Which has more resistance?

Answer 19

the long one

Question 20

You have 2 wires. 1 is thick, and the other is thin. Other than that, they are identical, which will get hotter.

Answer 20

the thin one

Question 21

3 lights are in a circuit. When one burns out, they all go out. When the burnt-out one is replaced with a good light, the other 2 work again. Are the lights wired in a parallel circuit or a series circuit?

Answer 21

series circuit

Question 22

If it takes a flow of charged particles to make a magnet, where is the charged particle flow in a permanent magnet?

Answer 22

the flow of charged particles is the motion of the electrons in its atoms.

Question 23

Is it possible to have a permanent magnet with only a north pole?

Answer 23

No

Question 24

Is it possible to make a magnet from something that is not a magnet?

Answer 24

Yes.

Question 25

If a material does not respond to a magnet, what can you conclude about the atoms in that material?

Answer 25

Its atoms cannot be aligned.