6.20.R - Quiz: Wires and Motors

Question 1

A current is flowing _____________.
protons
electrons
voltage
neutrons

Answer 1

electrons

Question 2

Why doesn’t the wire get hot in a circuit going from a battery through a light bulb?
the light bulb is not switched on
the light bulb reduces the current
the amps are too low
there are not enough volts

Answer 2

the light bulb reduces the current

Question 3

In one to three sentences, explain the difference between static electricity and current electricity.

Answer 3

Your Answer:
One main difference between static and current electricity is that static electricity is caused by friction, and the charges are found on the two surface areas. In contrast, a power source such as a power plant or a battery generates current electricity, which the charges are located in the conductor.

Question 4

What voltage produces a current of 500 amps with a resistance of 60 ohms?
3,000 volts
60,000 volts
6,000 volts
30,000 volts

Answer 4

30,000 volts

Question 5

What resistance would produce a current of 400 amperes from a socket putting out 2,000 volts?

Answer 5

5 ohm

Question 6

What do we call this formula?
Volta’s Law
Ampere’s Law
Ohm’s Law
Newton’s 2nd Law

Answer 6

Ohm’s Law

Question 7

The symbol for current in Ohm’s Law is ________.
I
C
R
V

Answer 7

I

Question 8

Where do most lightning strikes take place?
within the cloud
between clouds and tall buildings
between clouds
between clouds and electrical wires

Answer 8

within the cloud

Question 9

Charging by ____ involves rubbing two different materials together that have different pulls toward electrons so that one material will pull away electrons when the materials are separated, and both will become charged.
induction
friction
conduction

Answer 9

friction

Question 10

The reason the addition of small amounts of charge or its removal does not significantly affect the earth’s overall charge is that:
The lack of force of the electricity.
The earth’s terrain dissipates the charges.
The earth is over 70% water.
The earth’s large size.
The moisture in the earth’s surface.

Answer 10

The earth’s large size.

Question 11

Maxwell gave Faraday’s theories a firm ____________ foundation leading to advances in electricity and magnetism.
Mathematical
Scientific
Biblical
Philosophical

Answer 11

Mathematical

Question 12

Both cotton and wool are good insulators, so transfers of electrons only happen where they _________ each other.
dissolve
consume
touch
double

Answer 12

touch

Question 13

Semiconductors are neither good
_______
nor good
______
.

Answer 13

conductors
insulators

Question 14

Select the four materials that are the best conductors:
Wet ground
Wax
Gold
Saltwater
Wood
Silver

Answer 14

Wet ground
Gold
Saltwater
Silver

Question 15

What trick or rule helps you understand the force and direction of movement within the motor itself?
left arm rule
right leg rule
left hand rule
right hand rule

Answer 15

right hand rule

Question 16

Phloem

Answer 16

The phloem is a layer of plant tissue that conducts food made in the leaves down to the other parts of the plant. In woody plants, it is right under the hard, outer bark.

Question 17

Xylem

Answer 17

The xylem is woody plant tissue that serves to carry water and dissolved nutrients from the roots to the leaves.