- 1 and 2 only
- 2 and 3 only
- 1 and 3 only
- 1, 2 and 3
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Option 1 : 1 and 2 only
Difference Between Half Wave and Full Wave Rectifier:
| PARAMETERS | HALF-WAVE RECTIFIERS | FULL-WAVE RECTIFIERS |
| Rectification Efficiency | 40.60% | 81.20% |
| Ripple Factor | 1.21 | 0.482 |
| Transformer Utilization Factor | 0.286 | 0.692 |
| Voltage Regulation | Good | Better |
| The fundamental frequency of the ripple | Equal to Supply Frequency, f | Double of Supply Frequency, 2f |
| Form Factor | 1.57 | 1.11 |
| Peak Factor | 2 | 1.414 |
| Number of diodes | Only 1 | Vary from 2 to 4, 4 in case of the bridge rectifier |
| Peak Inverse Voltage | Vs | 2 Vs |
| DC Output Voltage | Imax/π RL | 2/π RL Imax |
| Cost | less | More (as more components are used) |
| PF | More | Less |
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Below stated are some of the statements about the Alternating current. You need to identify which of the following is incorrect,
1. DC power is far more powerful than AC power. The efficiency and power to size characteristics of DC motors and apparatuses are increased. Lighting by DC (LED) is 75% more efficient than lighting from incandescence.
2. A comparatively high voltage alternating current may be generated and easily raised and dropped by the static equipment known as the transformer, which makes electrical energy transmission and distribution economical,
3. Initial costs and maintenance of the AC motor are less expensive since it has no switch and is less powerful than the DC motor for constant working speed, hence it is desired to create power as alternating current.
4. The great efficiency of transmission in ac makes electric power generation cost-effective, Produced in huge quantities in one station and distributed throughout a vast area.?
Option 2 : Only 3Concept: DC power is more energy-efficient than AC power. DC Motors and appliance have higher efficiency and power to size characteristics. DC-based lighting (LED) is as much as 75% more efficient than...
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Which of the following statements are true about washing soda
1. Its chemical name is sodium hydrogen carbonate and its aqueous solution is basic in nature.
2. Its chemical name is sodium carbonate and the pH of its aqueous solution is more than 7.
3. It is used for raising of cakes while baking.
4. It is used for the removal of permanent hardness of water.
Select the correct answer using the code given below:?
Option 2 : 2 and 4 onlyThe correct answer is Option 2. Washing soda is obtained by heating baking soda and then recrystallizing the sodium carbonate. Chemical name - Sodium carbonate (Na2CO3). Other ways...
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There are eight cars A, B, C, D, E, F, G and H. Each car has a different price. Price of C is more than that of A and D. Price of at least two cars is less than A. Price of F is more than that of G and H. Price of D is less than G, but more than E. Price of B is less than H, but more than G. Price of at least four cars is more than that of C. Which of the following sequence is correct?
Option 1 : F > H > B > G > C > A > D > EEight cars: A, B, C, D, E, F, G and H. 1) Price of...
1 Answers 2 views
All power plants use superheated steam due to which of the following advantages
1. Superheating is mostly done from waste heat of boiler without additional cost of fuel.
2. The plant efficiency increases due to higher temperature of steam.
3. There is less corrosion and erosion of equipment due to absence of moisture in the steam.
Select the correct answer using the code given below:?
Option 2 : 2 and 3 onlyExplanation: Superheating of steam: The primary object of superheating steam is to avoid too much wetness at the end of the expansion. The use of an inadequate...
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Seven chocolates A, B, C, D, E, F and G are bought at different costs between Rs. 40 and Rs. 50 (excluding 40 and 50) but not necessarily in the same order. The cost of chocolate C is five less than that of chocolate E. The cost of the chocolate A is a prime number. The cost of chocolate F is two more than that of chocolate A. The cost of chocolate F is more than that of chocolate E. The cost of chocolate D is an odd number. The cost of chocolate G is three more than the cost of chocolate D. None of the chocolates costs Rs. 44. The cost of chocolate B is an even number. Which is the following chocolates is costlier than E?
Option 2 : GSeven Chocolates: A, B, C, D, E, F and G. Cost of Chocolates: Between Rs. 40 and Rs. 50 (1) The cost of the chocolate A is a prime number, implies A...
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The speed of six bikes B1, B2, B3, B4, B5 and B6 has been compared. The speed of the B6 exceeds just three bikes. No two bikes have the same speed. The speed of B4 is more than that of B2 but less than that of B6. The speed of B3 is not less than that of B5. The speed B2 is not minimum. If the speed of B5 is not less than that of B2, then which of the following pair of bikes has more speed than that of B4?
Option 2 : B5, B3The speed of six bikes B1, B2, B3, B4, B5 and B6 has been compared. i) The speed of the B6 exceeds just three bikes. ii) The speed of B4...
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P, Q, R, Sand T are five crops that Babu grows. T is fast growing and more water demanding than R which gives more yield than T. P gives more yield than R and grows faster than Q. Q is more water demanding than T but is second lowest yielder, S is the slowest growing and least water demanding of all crops but gives highest yield. R is more water demanding and grows faster than P. Select the crop or crops that has/ have as many as crops that are more water demanding and as many as crops that give less yield than it. ?
Option 1 : S, P and ROption(1) is correct. We arrange the given data in decreasing order of each in Water demanding, crops growing rate and crops yield as : [ alt="15Feb...
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Height of 8 boys B1, B2, B3, B4, B5, B6, B7, and B8 are compared. Height of B3 will be the least or maximum. Height of B4 is more than B6. Height of B8 is less than only 3 boys. Height of B2 is more than B1 but less than B8. Height of B2 is less than B3. If the height of B4 is less than B1, then which of the following sequence of their heights may be correct?
Option 3 : B3 > B5 = B7 > B8 > B2 > B1 > B4 > B6The logic followed is: Height of 8 boys B1, B2, B3, B4, B5, B6,...
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The average of eight batsmen J, K, L, M, N, O, R, and T is compared. The number of batsman having average less than L are same as the number of batsman having average more than M. Average of T is less than M and more than K. Average of L is less than K. Average of two batsman lies between the average of M and L. Average of O is less than N and K both. Which of the following can be the correct sequence of their averages?
Option 4 : J >R > M > T > K > L > N > O Average of eight batsmen: J, K, L, M, N, O, R and T. 1) Average of...
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Three concurrent processes X, Y, and Z execute three different code segments that access and update certain shared variables. Process X executes the P operation (i.e., wait) on semaphores a, b and c; process Y executes the P operation on semaphores b, c and d; process Z executes the P operation on semaphores c, d, and a before entering the respective code segments. After completing the execution of its code segment, each process invokes the V operation (i.e., signal) on its three semaphores. All semaphores are binary semaphores initialized to one. Which one of the following represents a deadlock-free order of invoking the P operations by the processes?
Option 2 : X: P(b)P(a)P(c) Y: P(b)P(c)P(d) Z: P(a)P(c)P(d)Answer: Option 2 Explanation: Given Process X will perform down operation on a, b, c Process Y will perform down operation on b, c, d Process Z will perform down...
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