- Inductance
- Condenser
- Variable resistor
- Resistance
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What is the purpose of the electromagnetic field which surrounds a traveling-wave tube?
Answer: Option 3 Let'
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When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in?
Answer: Option 3 The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a...
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When a dielectric material is subjected to alternating field, the absorption of energy by the material from the field is given by the imaginary part of polarizability.?
Answer: Option 1 Let'
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Theoretically electromagnetic radiation field strength varies in inverse proportion to the square of the distance, but when atmospheric attenuation effects and the absorption of the terrain are taken into account the attenuation can be as high as the inverse ___________ power of the distance.?
Answer: Option 4 Let'
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When the current through an inductor decreases, the amount of energy stored in the electromagnetic field?
Answer: Option 2 Let'
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When the current through an inductor is cut in half, the amount of energy stored in the electromagnetic field?
Answer: Option 1 Let'
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Directions : In each of the following questions a statement is given, followed by two conclusions. Give answer : Statements : Wind is an inexhaustible source of energy and an aerogenerator can convert it into electricity. Though not much has been done in this field, the survey shows that there is vast potential for developing wind as alternative source of energy. Conclusions : I. Energy by wind is comparatively newly emerging field. II. The energy crisis can be dealt by exploring more in the field of aero-generation.?
Answer: Option 5 The phrase 'not much has been done in this field' indicates that wind energy is a comparatively newly emerging field. So, I follows. The expression 'there is...
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In a reaction, the threshold energy is equal to (where, A = activation energy N = normal energy of reactants)?
Answer: Option 3 Let'
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Directions : Each of the following question consists of a statement followed by two arguments I and II. You have to decide which of the arguments is a STRONG arguments and which is a WEAK Argument. Statement : Should India make efforts to harness solar energy to fulfil its energy requirements Arguments : I. Yes, Most of the energy sources used at present is exhaustible. II. No. Harnessing solar energy requires a lot of capital, which India lacks in.?
Answer: Option 1 Clearly, harnessing solar energy will be helpful as it is an inexhaustible resource unlike other resources. So, argument I holds. But argument II is vague as solar...
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Which circuit element(s) will oppose the change in circuit current?
Answer: Option 2 Let'
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