LED stands for MCQ with Answer and Explanation
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Question #1
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Alpha particle is:
Correct Answer: Option D
Explanation:
Alpha (α) radiation: helium nucleus (²He⁴, 2p+2n), +2 charge, low penetration. Beta: electrons; Gamma: photons; Neutron: neutral particle. Memory aid: 'Alpha = He nucleus; Beta = electron; Gamma = EM wave'. Radioactivity classification frequently tested in competitive exams to distinguish radiation types.
Alpha (α) radiation: helium nucleus (²He⁴, 2p+2n), +2 charge, low penetration. Beta: electrons; Gamma: photons; Neutron: neutral particle. Memory aid: 'Alpha = He nucleus; Beta = electron; Gamma = EM wave'. Radioactivity classification frequently tested in competitive exams to distinguish radiation types.
Question #2
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The ripple factor of a full wave rectifier is approximately
Question #3
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The frequency of a tuning fork is 512 Hz. It produces resonance in a closed organ pipe of length 16 cm (speed of sound 340 m/s). The pipe resonates in
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