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During the short-circuit test of a synchronous machine, which of the following are accounted for in the short-circuit test loss? (i), I2R loss in the armature winding due to the flow of short-circuiting (AC) current (ii) Local core loss caused by armature leakage flux (iii) Core loss due to resultant air-gap flux. (iv) Windage and friction loss
A 440 V, 4-pole, 25 kW, dc generator has a wave-connected armature winding with 846 conductors. The mean flux density in the air-gap under the interpoles is 0.5 Wb/m2 on full load and the radial gap length is 0.3 cm. Number of turns required on each interpole is _________
Two generators A and B have 6 poles each. Generator A has wave wound armature while generator B has lap wound armature. The ratio of the induced e.m.f. is generator A and B will be
In a mutual fund Capti, customers gets 100% increment in 5 years and in another mutual fund Capfirst customers get 200% in 12 years. What amount will Anamika get after 3 years if she invests total of Rs. 27000 in these two mutual funds in the ratio of 5 : 4? (Assume both mutual fund credits interest in simple rate)
Consider the following statements with respect to synchronous machines. State whether these statements are true or false. (a) Armature reaction is demagnetising when a generating machine supplies zero power factor lagging current. (b) Armature reaction is magnetising when a generating machine supplies zero power factor leading current. (c) Armature reaction is mostly cross-magnetising, though it has a small demagnetising component, when a generating machine supplies unity power factor current.
Transient stability of the generator is dependent on (a) generator reactance; lower reactance decreases peak power and increases initial rotor angle. (b) how heavily the generator is loaded. (c) generator inertia; higher the inertia, slower the rate of the change of angle. (d) generator output during fault Which of the above is incorrect?
A gap opening penalty for any gap (g) and a gap extension penalty for each element in the gap (r) are most often used, to give a total gap score wx, according to the equation ______
In the following question, sentences of a paragraph have been jumbled and labeled as A, B, C, and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A. The value of the mutual fund company depends on the performance of the securities it decides to buy. B. Investing in a share of a mutual fund is different from investing in shares of stock. C. When you buy a unit of a mutual fund, you are buying the performance of its portfolio. D. Mutual funds pool money from the investing public and use that money to buy other securities, usually stocks and bonds.
Why a retail investor is recommended to invest through a mutual fund in a stock exchange?
1. Mutual funds invest funds in a diversified portfolio of securities, thus reducing the risk of the investor.
2. Mutual funds are managed by financial experts.
3. Mutual funds promise high returns to the investors of the fund.
From the reaction, Methane –> Carbon + 2(Hydrogen molecule) find the ratio of N Flux of A to the Total N flux( A+B); Given N Flux of B =-2 N flux of A.