MCQ
A nuclear reaction with positive Q value is:
- AEndothermic
- BExothermic
- CEither endothermic or exothermic
- DNeither endothermic nor exothermic
Explanation:
An exothermic reaction is that in which heat is released.
An exothermic reaction is that in which heat is absorbed.
In a nuclear reaction, if the mass of the product nucleus and outgoing particle is less than the mass of the target nucleus and bombarding particle, then energy is released (exothermic reaction), and Q-value is +ve.
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The similarity between the sound waves and light waves is
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(a) Both are electromagnetic waves |
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(b) Both are longitudinal waves |
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(c) Both have the same speed in a medium |
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(d) They can produce interference |
A moving coil galvanometer has a resistance of 50 Ω and gives full scale deflection for 10 mA. How could it be converted into an ammeter with a full scale deflection for 1A
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(a) 50/99 Ω in series |
(b) 50/99 Ω in parallel |
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(c) 0.01 Ω in series |
(d) 0.01 Ω in parallel |