Physics 8th STD Quiz
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Welcome to the Physics Quiz for 8th-grade students! This quiz is designed to test your understanding of fundamental concepts in physics. Get ready to explore the fascinating world of forces, motion, energy, and more. Each question is crafted to challenge your knowledge and curiosity about the physical principles that govern our universe. Whether you're a budding physicist or just starting your journey into the world of science, this quiz offers a fun and engaging way to assess your grasp of basic physics concepts. Good luck, and enjoy the exploration of the wonders of physics!
- 1.
The path in which the current flows is
- A.
Open
- B.
Closed
- C.
Semi-opened
- D.
Semi-closed
- E.
None of the above
Correct Answer
B. ClosedExplanation
The correct answer is "Closed" because in a closed circuit, there is a complete path for the current to flow. This means that all the necessary components, such as wires and switches, are connected in a way that allows the current to flow from the source, through the circuit, and back to the source. In a closed circuit, the current can flow continuously, enabling the electrical devices connected to the circuit to function properly.Rate this question:
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- 2.
The closed path in which the current flows is called?
- A.
Electric current
- B.
Non electric current
- C.
Magnetic current
- D.
Non-magnetic current
- E.
None of the above
Correct Answer
A. Electric currentExplanation
The closed path in which the current flows is called an "electric circuit." So, none of the options provided ("electric current," "non-electric current," "magnetic current," "non-magnetic current") accurately describe the closed path in which the current flows.Rate this question:
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- 3.
Which of the following is an example of potential energy?
- A.
A moving car
- B.
A stretched rubber band
- C.
A rolling ball
- D.
A spinning top
Correct Answer
B. A stretched rubber bandExplanation
Potential energy is stored energy that an object possesses due to its position or condition. In the case of a stretched rubber band, it has the potential to do work when released and can transform into kinetic energy.Rate this question:
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- 4.
What law of motion states that for every action, there is an equal and opposite reaction?
- A.
Newton's First Law
- B.
Newton's Second Law
- C.
Newton's Third Law
- D.
Archimedes' Principle
Correct Answer
C. Newton's Third LawExplanation
Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. This law emphasizes the balanced nature of forces in any interaction.Rate this question:
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- 5.
Which type of energy is associated with the motion of particles and is responsible for the sensation of warmth or heat?
- A.
Mechanical energy
- B.
Nuclear energy
- C.
Thermal energy
- D.
Electrical energy
Correct Answer
C. Thermal energyExplanation
Thermal energy is associated with the motion of particles within a substance. The faster the particles move, the higher the temperature, and this energy is responsible for the sensation of warmth or heat.Rate this question:
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- 6.
In the electromagnetic spectrum, which type of radiation has the shortest wavelength?
- A.
Infrared
- B.
Ultraviolet
- C.
X-rays
- D.
Gamma rays
Correct Answer
D. Gamma raysExplanation
In the electromagnetic spectrum, gamma rays have the shortest wavelength and the highest frequency. They are a form of ionizing radiation and are often associated with nuclear reactions and processes.Rate this question:
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- 7.
The open circuit is the one
- A.
If the wire is open then it is open circuit
- B.
If the switch is opened or the wire is cut the circuit is open.
- C.
Tf the current is stopped it is open
- D.
If the current is drawn from the cell it is open circuit
- E.
None of the above
Correct Answer
B. If the switch is opened or the wire is cut the circuit is open.Explanation
The correct answer is "If the switch is opened or the wire is cut the circuit is open." This is because when the switch is opened or the wire is cut, it creates a gap in the circuit, preventing the flow of current. In an open circuit, there is no complete path for the current to flow from the source to the load, resulting in no current flowing through the circuit.Rate this question:
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- 8.
What is a closed circuit?
- A.
If the electric current is closed, then it is a closed circuit.
- B.
If the current is drawn from the cell, it is said to be a closed circuit.
- C.
Electric circuit with switch is off is closed circuit
- D.
None of the above.
Correct Answer
B. If the current is drawn from the cell, it is said to be a closed circuit.Explanation
A closed circuit refers to an electric circuit where the current flows continuously without any interruption. In this context, if the current is drawn from the cell, it indicates that the circuit is complete and the current can flow through it, making it a closed circuit.Rate this question:
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- 9.
The circuit diagram indicates the arrangement of
- A.
Different circuit elements with their conventional symbols
- B.
Different symbols of the magnets
- C.
Different arrangement of lines of current
- D.
Different symbols arranged in proper order
- E.
None of the above
Correct Answer
A. Different circuit elements with their conventional symbolsExplanation
The circuit diagram is a visual representation of different circuit elements, such as resistors, capacitors, and transistors, using their conventional symbols. It allows us to understand how these elements are connected and interact with each other in a circuit. Therefore, the correct answer is that the circuit diagram indicates the arrangement of different circuit elements with their conventional symbols.Rate this question:
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- 10.
Magnetic effect is used in the following...
- A.
Refrigerator, TV, mixer, and ice cream
- B.
Electric Motors, dynamos, telegraphs, telephones, electric bells, etc.
- C.
Satellite, motorbike, and aircraft
- D.
None
Correct Answer
B. Electric Motors, dynamos, telegrapHs, telepHones, electric bells, etc.Explanation
The correct answer is "Electric Motor, dynamo, telegraph, telephone, electric bell, etc." These devices all utilize the magnetic effect. Electric motors use magnets to convert electrical energy into mechanical energy. Dynamos use magnets to generate electricity; telegraphs and telephones use magnets to transmit and receive signals, and electric bells use magnets to produce sound.Rate this question:
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 14, 2024Quiz Edited by
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Expert Reviewed by
Matt Balanda -
Dec 06, 2008Quiz Created by
Krish3112
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