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Consider the following statements regarding optocouplers: 1. Optocouplers are LEDs driving photodiodes in a single package to provide electrical isolation between input and output 2. Optocoupler is an LED driving a phototransistor in a single package that replaces pulse transformers working at input zero crossing 3. Optocouplers are used as temporary non-fixed joints between optical fiber terminations. Which of the above statements are correct?
What is the difference between a CFL and an LED lamp? 1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semiconductor material. 2. The average life span of a CFL is much longer than that of an LED lamp. 3. A CFL is less energy-efficient as compared to an LED lamp. Which of the statements given above is/are correct?
What is the difference between a CFL and an LED lamp? 1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material. 2. The average life span of a CFL is much longer than that of an LED lamp. 3. A CFL is less energy-efficient as compared to an LED lamp. Which of the statements given above is/are correct?
What is the difference between a CFL and an LED Lamp?
1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material.
2. The average life span of a CFL is much longer than of an LED lamp.
3. A CFL is less energy efficient as compared to an LED lamp.
Which of the statements given above is/are correct?
With reference to street-lighting, how do sodium lamps differ from LED lamps? 1. Sodium lamps produce light in 360 degrees but it is not so in the case of LED lamps. 2. As street lights, sodium lamps have a longer life span than LED lamps. 3. The spectrum of visible light from sodium lamps is almost monochromatic while LED lamps offer significant colour advantages in street lighting. Select the correct answer using the code given below.  
A passage is given with five questions following it. Read the passage carefully and select the best answer to each question out of the given fouralternatives. He wasn't the first, nor would he be the last, but the wiry, bespectacled man from Gujarat is certainly the most famous of the world's peaceful political dissidents.Mohandas Gandhi – also affectionately known as Mahatma – led India's independence movement in the 1930s and 40s by speaking softly without carrying much ofa big stick, facing down the British colonialists with stirring speeches and non-violent protest. More than anything else, historians say, Gandhi proved that one manhas the power to take on an empire, using both ethics and intelligence. Urges Britain to quit India It is hard to imagine the thin, robed Gandhi working in the rough and tumble world of law, but Gandhi did get his start in politics as a lawyer in South Africa, where he supported the local Indian community's struggle for civil rights. Returning to India in 1915, he carried over his desire to improve the situation of the lower classes. Gandhi quickly became a leader within the Indian National Congress, a growing political party supporting independence, and traveled widely with the party to learnabout the local struggles of various Indian communities. It was during those travels that his legend grew among the Indian people, historians say. Gandhi was known as much for his wit and intelligence as for his piety. When he was arrested several more times over the years for his actions during the movement,Gandhi calmly fasted in prison, believing that his death would embarrass the British enough to spur independence, which had become the focus of his politics by1920. Gandhi's non-cooperation movement, kicked off in the early 1920s, called for Indians to boycott British goods and traditions and become self-reliant. His mostfamous protest came in 1930, when Gandhi led thousands of Indians on a 250-mile march to a coastal town to produce salt, on which the British had a monopoly. What led to the growth of legend of Mahatma Gandhi among the Indians?
Which of the following is not a type of optocoupler?
The price of LED strap is directly proportional to square to its length. A shopkeepers cut the LED strap in the ratio of 5 ∶ 4 ∶ 3 and this leads to a loss of Rs 1880. What is the initial price of LED strap?
Price of LED strip is constant at Rs. 150 up to the length of x meter and beyond that it is charged Rs. 22 per meter. If a person buys 17 meter LED strip, he has to pay total amount of Rs. 392. What will be the price of 23 meter LED strip?
Consider the given statement and decide which of the given assumptions is (are) implicit in the statement. Statement:  Syska LEDs have the largest sales compare to other LED companies of India. Assumptions: I: The high sales is due to the different Wattage of LED. II: The sales of all the LED manufacturing companies in India is known.