write c for conductor or i for insulator.
7.3) _____ metal
7.4) _____ people
7.5) _____ rubber
7.6) _____ plastic
7.7) _____ water
choose the best answers.
7.8) _____ what is a superconductor?
a. a material that blocks or stops the flow of electricity through it
b. a material that can conduct electricity with no resistance
c. a material that creates resistance to electricity
7.9) _____ what is an example of how superconductors are used in everyday life?
a. to keep astronauts safe on space missions
b. to make light bulbs brighter
c. to help mri machines create detailed images
7.10) _____ what is an example of how insulators are used in everyday life?
a. to help computers carry electrical signals
b. to prevent electrical shock when using appliances
c. to help peoples hearts beat normally
write the correct answer.
7.11) explain how conductors and insulators are used in everyday life._________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
check correct recheck

Question

write c for conductor or i for insulator.
7.3) _____ metal
7.4) _____ people
7.5) _____ rubber
7.6) _____ plastic
7.7) _____ water
choose the best answers.
7.8) _____ what is a superconductor?
a. a material that blocks or stops the flow of electricity through it
b. a material that can conduct electricity with no resistance
c. a material that creates resistance to electricity
7.9) _____ what is an example of how superconductors are used in everyday life?
a. to keep astronauts safe on space missions
b. to make light bulbs brighter
c. to help mri machines create detailed images
7.10) _____ what is an example of how insulators are used in everyday life?
a. to help computers carry electrical signals
b. to prevent electrical shock when using appliances
c. to help peoples hearts beat normally
write the correct answer.
7.11) explain how conductors and insulators are used in everyday life._________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
_____________________________________________________________________
check  correct  recheck

Accepted Answer

### 7.3)
# Brief Explanations:
Metals are good conductors of electricity as they have free electrons that can move easily to conduct electric current. So metal is a conductor.
# Answer:
C

### 7.4)
# Brief Explanations:
The human body contains water and ions, which allow the flow of electric current. So people (human body) act as conductors.
# Answer:
C

### 7.5)
# Brief Explanations:
Rubber does not allow electric current to pass through it easily. It is a common insulating material, used in electrical wires' insulation, for example.
# Answer:
I

### 7.6)
# Brief Explanations:
Plastic is a non - conductor of electricity. It is used to insulate electrical components to prevent electric shock and unwanted current flow.
# Answer:
I

### 7.7)
# Brief Explanations:
Pure water is a poor conductor, but water with impurities (like in our daily use, tap water) contains ions that can conduct electricity. So water (in the context of daily use with impurities) is a conductor.
# Answer:
C

### 7.8)
# Brief Explanations:
- Option A: Materials that block electricity are insulators, not superconductors.
- Option B: Superconductors are materials that can conduct electricity with zero electrical resistance, which is their defining property.
- Option C: Materials that create resistance are resistors, not superconductors.
# Answer:
B. a material that can conduct electricity with no resistance

### 7.9)
# Brief Explanations:
- Option A: Superconductors are not primarily used for astronaut safety in space missions.
- Option B: Superconductors don't make light bulbs brighter. Light bulb brightness is related to power (current and voltage) and the filament's properties.
- Option C: MRI machines use superconducting magnets. The superconducting magnets can produce strong, stable magnetic fields with very low energy loss (due to zero resistance), which helps in creating detailed images of the body's internal structures.
# Answer:
C. to help MRI machines create detailed images

### 7.10)
# Brief Explanations:
- Option A: Conductors are used to carry electrical signals in computers, not insulators.
- Option B: Insulators (like the plastic or rubber coating on electrical appliance cords) prevent the flow of current to the outer surface, thus preventing electrical shock when we use appliances.
- Option C: Devices that help hearts beat normally (pacemakers) use electrical components, but insulators are not used for this direct function of heart regulation.
# Answer:
B. to prevent electrical shock when using appliances

### 7.11)
# Brief Explanations:
Conductors: Wires in electrical circuits (made of metal like copper) are conductors. They allow electric current to flow from the power source to devices like lights, TVs, etc., enabling these devices to function. For example, the copper wires in a lamp cord carry electricity to the bulb so it can light up.

Insulators: The outer covering of electrical wires is made of an insulating material (like rubber or plastic). This insulation prevents the current from leaking out, which would cause electric shock to people handling the wires and also prevents short - circuits. Another example is the plastic handle of a screwdriver used on electrical appliances; it insulates the user from the metal part of the screwdriver, which might be in contact with electricity, thus preventing electric shock.
# Answer:
Conductors (e.g., metal wires) are used to carry electric current in electrical devices (like in a toaster, the metal elements that heat up use the current carried by conductor wires). Insulators (e.g., plastic coating on wires, rubber handles of electrical tools) are used to prevent electric shock by stopping the flow of current to unwanted areas and to prevent short - circuits.

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QUESTION IMAGE

Question

Explanation:

7.3)

Answer:

7.4)