Electricity & Heat Transfer Cfu
Questions and Answers
- 1.
Explain why small pieces of tissue paper stick to a charged balloon.
- 2.
Explain the difference between a series circuit and a parallel circuit. Which do you have in your house?
- 3.
What supplies energy in an electric circuit?
- A.
A conductor
- B.
Light bulb
- C.
A wire
- D.
A battery
Correct Answer
D. A batteryExplanation
A battery supplies energy in an electric circuit. It is a device that converts chemical energy into electrical energy and provides a steady flow of electrons, creating a potential difference. This potential difference allows the flow of current through the circuit, powering various electrical components such as light bulbs, motors, and electronic devices. Without a battery or any other source of energy, the circuit would not be able to function.Rate this question:
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- 4.
Which material is a good conductor?
- A.
Glass
- B.
Wood
- C.
Plastic
- D.
Silver
Correct Answer
D. SilverExplanation
Silver is a good conductor of electricity and heat due to its high electrical conductivity and thermal conductivity. It has a large number of free electrons that can move easily through its atomic lattice, allowing for the efficient flow of electric current. This property makes silver widely used in electrical wiring, circuit boards, and various electronic components. Additionally, silver also has excellent reflectivity and is often used in mirrors and reflective coatings.Rate this question:
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- 5.
What is called a cell?
- A.
The wires
- B.
A battery
- C.
The switch
- D.
The circuit
Correct Answer
B. A batteryExplanation
A cell is called a battery.Rate this question:
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- 6.
Materials that do not allow electrical charges to pass through it easily are called
Correct Answer
insulators, Instulators, a insulator, insulator, InsulatorExplanation
The correct answer is "insulators". Insulators are materials that have high resistance to the flow of electrical charges. They prevent the easy passage of electricity and are commonly used to protect against electric shocks or to insulate electrical wires and cables. The variations in capitalization and the inclusion of "a" in the options are incorrect spellings or grammatical errors.Rate this question:
- 7.
Check the good electrical conductors
- A.
Rubber band
- B.
Penny
- C.
Nickel
- D.
Toothpick
- E.
Key
- F.
Paper clip
- G.
Brass fastener
- H.
Glass slide
Correct Answer(s)
B. Penny
C. Nickel
E. Key
G. Brass fastenerExplanation
The given list includes various objects, and the question asks us to identify the good electrical conductors from the list. Electrical conductors are materials that allow the flow of electric current. In this case, the objects that are good electrical conductors are the penny, nickel, key, and brass fastener. These objects are typically made of metals, which are known for their ability to conduct electricity.Rate this question:
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- 8.
Check the good electrical insulators
- A.
Rubber band
- B.
Penny
- C.
Wood
- D.
Nickel
- E.
Paper clip
- F.
Glass
- G.
Plastic
Correct Answer(s)
A. Rubber band
C. Wood
F. Glass
G. PlasticExplanation
Rubber band, wood, glass, and plastic are considered good electrical insulators because they have high resistance to the flow of electric current. These materials do not easily allow the movement of electrons, which prevents the flow of electricity. Rubber band and plastic are both made of polymers, which have high resistivity due to their molecular structure. Wood is a natural insulator due to its low water content and the presence of air-filled cells. Glass is an excellent insulator because it has a highly stable molecular structure and does not conduct electricity.Rate this question:
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battery maintenance MCQ quiz questions with answers
battery maintenance MCQ quiz questions with answers
Electricity - Class 10th free online Test - Ankan Sir
Electricity - Class 10th free online Test - Ankan Sir
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