Here are 20 objective Physics questions along with their answers, with a one-line gap between each question:
- What is the SI unit of electric current? Answer: Ampere
- Which physical quantity is measured in Hertz (Hz)? Answer: Frequency
- What is the value of the acceleration due to gravity (g) on the surface of the Earth? Answer: 9.8 \text{ m/s}^2
- Which law states that "pressure applied to an enclosed fluid is transmitted undiminished to every part of the fluid"? Answer: Pascal's Law
- What type of mirror is commonly used as a rear-view mirror in vehicles? Answer: Convex mirror
- What is the speed of light in a vacuum? Answer: 3 \times 10^8 \text{ m/s}
- Which instrument is used to measure atmospheric pressure? Answer: Barometer
- What is the phenomenon of splitting of white light into its seven constituent colors called? Answer: Dispersion of light
- Which scientist formulated the three laws of motion? Answer: Sir Isaac Newton
- What is the unit of electrical resistance? Answer: Ohm (\Omega)
- Which form of energy is stored in a stretched rubber band? Answer: Potential energy
- What is the boiling point of water on the Kelvin scale? Answer: 373.15 \text{ K} (or 373 \text{ K})
- Which color of light deviates the least through a prism? Answer: Red
- What device converts mechanical energy into electrical energy? Answer: Dynamo or Generator
- What is the primary source of energy for the sun and stars? Answer: Nuclear fusion
- Which quantity remains constant in a simple harmonic motion (SHM)? Answer: Total mechanical energy
- What lens is used to correct myopia (nearsightedness)? Answer: Concave lens
- What is the SI unit of work and energy? Answer: Joule
- Which subatomic particle has a negative electric charge? Answer: Electron
- What is the frequency range of audible sound for humans? Answer: 20 \text{ Hz} to 20,000 \text{ Hz}
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