The unit of electric current in CGS system is MCQ with Answer and Explanation
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Question #1
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Mercury is used in thermometers because it
Question #2
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Photon energy E = hν. For higher frequency light, photon energy is:
Correct Answer: Option C
Explanation:
E ∝ ν: higher frequency ⇒ higher photon energy. Gamma rays (high ν) more energetic than radio waves (low ν). Memory aid: 'E = hν; blue light photons more energetic than red'. Quantum physics relation frequently tested in competitive exams.
E ∝ ν: higher frequency ⇒ higher photon energy. Gamma rays (high ν) more energetic than radio waves (low ν). Memory aid: 'E = hν; blue light photons more energetic than red'. Quantum physics relation frequently tested in competitive exams.
Question #3
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The energy emitted by the Sun is primarily a result of:
Correct Answer: Option A
Explanation:
The Sun and other stars generate their immense energy through nuclear fusion. In the Sun's core, immense gravitational pressure and heat cause hydrogen nuclei (protons) to overcome electrostatic repulsion and fuse together to form helium nuclei. This fusion process releases vast amounts of energy according to Einstein's E=mc².
The Sun and other stars generate their immense energy through nuclear fusion. In the Sun's core, immense gravitational pressure and heat cause hydrogen nuclei (protons) to overcome electrostatic repulsion and fuse together to form helium nuclei. This fusion process releases vast amounts of energy according to Einstein's E=mc².
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