1. Plastic wire is
a. An insulator
b. A conductor
c. Both of these
d. None of these
2. Electroplating is based on
a. Magnetic effect of electricity
b. Chemical effect of electricity
c. Heating effect of electricity
d. Physical effect of electricity
3. Adding common salt to distilled water makes it
a. Good conductor
b. Insulator
c. No
d. Both a and b
4. An electrolyte is
a. a metal
b. a solution
c. a liquid that conducts current
d. all of above
5. Copper wire is a
a. Good conductor
b. Poor conductor
c. Both a and b
d. None of this
6. Poor conductors are
a. Plastics
b. Clothes
c. Wood
d. All of these
7. Distilled water is
a. Poor conductor
b. Good conductor
c. Both a and b
d. None
8. Flow of electron is called
a. Electroplating
b. Electric current
c. Electrodes
d. Electrolyte
9. Electroplating prevents
a. Current
b. Chemical effect
c. Rusting
d. All
10. An electric lamp glows due to
a. Chemical effect
b. Magnetic effect
c. Heating effect
d. None
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Answers
Answer:
1. an insulator.
3. Good conductor
4. solution
5. Good conductor
6. poor conductor
7. poor conductor
8. electric current
9. current
10. heating effect
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1) a. An insulator. The plastic wire is an insulator, meaning it does not allow electricity to flow through it easily. It is used to protect electrical wires and circuits and to prevent short circuits.
2) b. Chemical effect of electricity. Electroplating is a process that uses electricity to coat a metal object with a thin layer of another metal. This is accomplished through the chemical reaction between the metal ions in a solution and the electrode that is being coated. The chemical effect of electricity drives the transfer of metal ions from the solution to the surface of the electrode, resulting in a uniform, metallic coating.
3) a. Good conductor. Adding common salt to distilled water makes it a good conductor of electricity. This is because the salt ions dissolve in the water and increase the number of ions available to carry electrical current, making it easier for electricity to flow through the solution. The conductivity of the saltwater solution can be used in various applications, including electroplating and battery electrolytes.
4) b. a solution. An electrolyte is a solution that conducts electricity by means of the movement of ions. It can be a solid, liquid or gel that contains ions and can carry electrical current. Electrolytes are important in many processes including electroplating, battery operation, and chemical reactions.
5) a. Good conductor. Copper wire is a good conductor of electricity, meaning it allows electricity to flow through it easily. This property makes it a commonly used material in electrical wiring and in the manufacture of electrical components, such as transformers and motors. Copper's high conductivity and low resistance make it an efficient material for carrying electrical current.
6) d. All of these. Plastics, clothes, and wood are poor conductors of electricity, meaning they do not allow electricity to flow through them easily. This property makes them useful as insulators, which protect electrical circuits and prevent short circuits. Poor conductors are used in a variety of electrical applications, including electrical wiring and the manufacture of electrical appliances.
7) a. Poor conductor. Distilled water is a poor conductor of electricity, meaning it does not allow electricity to flow through it easily. This property makes it a useful insulator in certain electrical applications, such as in batteries and in laboratory experiments. However, if an electrolyte, such as salt, is added to distilled water, its conductivity will increase and it will become a good conductor of electricity.
8) b. Electric current. The flow of electrons through a material is referred to as an electric current. Electric current is what allows electricity to be transferred and used to power electrical devices, such as lights and motors. The flow of electric current is measured in units of amperes (amps) and is influenced by factors such as the conductivity of the material and the potential difference (voltage) across it.
9) c. Rusting. Electroplating is a process that uses electricity to coat a metal object with a thin layer of another metal. This process can be used to prevent rusting by providing a protective layer on top of the metal. The electroplated layer can prevent the exposure of the metal to air and moisture, which can cause it to rust and corrode over time. By preventing rusting, electroplating helps to increase the lifespan and improve the appearance of metal objects.
10) c. Heating effect. An electric lamp, such as an incandescent light bulb, glows due to the heating effect of electricity. When an electric current passes through the filament in the bulb, it heats up and starts to glow. This glow produces light, which is what illuminates the surrounding area. The heating effect of electricity is due to the resistance of the filament, which causes it to heat up as electric current flows through it.
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