Indian Institute of Technology Delhi
Question : Read the passage and answer the following questions. IIT Delhi researchers have designed and fabricated a device that can generate electricity from water drops, raindrops, water streams, and even from ocean waves using "Triboelectric Effect" and "Electrostatic Induction". The device is called "Liquid-solid Interface Triboelectric Nanogenerator". The generated electricity can be stored in batteries for further use. Triboelectric effect is a known phenomenon for a long time, and in this effect, charges are generated when two surfaces are in friction. The best example we see are sparkling lights when we move the blankets/jackets.
The device has a very simple structure consisting of specially designed nanocomposite polymers and contact electrodes and can generate a few Milliwatt mW power, which is sufficient to power small electronic devices like watches, digital thermometers, radio frequency transmitters, healthcare sensors, pedometers. When compared to conventional methods, such as the use of the piezoelectric effect, the present device can generate significantly more electricity.
The researchers successfully incorporated nanostructures into a polymer matrix, which enhanced the film's surface roughness, polarizability, and hydrophobicity, among other characteristics, as a result. Due to the enhancement in the above property, the flexible film is used to fabricate the device where raindrops have just to slide down and can generate electricity. The artificially created rough surface allows to generate more charge and superhydrophobic properties of the solid surface help to roll the water drop without getting stick to the surface.
The IIT Delhi research team also explored the underlying mechanism of the electricity generated when the water drop comes in contact with the solid surface and it is shown that saline water drops generate more electricity. The researchers also showed that the device can even work with ocean waves, where the water is saline, and through the ocean waves contacting the surface of nanocomposite polymer film, electricity is generated.
Question:Name the electronic devices which can be powered with the device mentioned in the passage: 1. Watches 2. Pedometers 3. Refrigerators 4. Radio Frequency Transmitters
Option 1: Only 1 and 2
Option 2: All 1,2,3, and 4
Option 3: Only 3 and 4
Option 4: Only 1,2 , and 4
Correct Answer: Only 1,2 , and 4
Solution : The correcrt option is 4 i.e "Only 1, 2, and 4." Explanation:
Let's refer to the following lines of the passage:
The device has a very simple structure consisting of specially designed nanocomposite polymers and contact electrodes and can generate a few Milliwatt (Mw) power, which is sufficient to power small electronic devices like watches, digital thermometers, radio frequency transmitters, healthcare sensors, pedometers. The above statement clearly mention the watches, pedometers and radio frequency transmitters.
Question : Where was India's first computer installed?
Option 1: Indian Institute of Technology , Delhi
Option 2: Indian Institute of Science, Bangalore
Option 3: Indian Iron & Steel Co. Ltd., Burnpur
Option 4: Indian Statistical Institute, Calcutta
Correct Answer: Indian Statistical Institute, Calcutta
Solution : The correct option is Indian Statistical Institute, Calcutta.
The "Hole Card System," India's first computer, was established at the Indian Statistical Institute (ISI) in Calcutta (now Kolkata). This computer, which was built in-house at ISI, went into operation in 1955. The Hole Card System was a key milestone in the history of computers in India, and it was employed at the Indian Statistical Institute for different statistical and scientific objectives.
Question : Directions: How many quadrilaterals are there in the given figure?
Option 1: 19
Option 2: 21
Option 3: 18
Option 4: 22
Correct Answer: 22
Solution : The given figure can be labelled as shown below –
In the above-labelled figure, there are a total of 22 quadrilaterals. They are AEFH, ALMH, ABIH, ELMF, EBIF, LBIM, HFGJ, HNOJ, HIKJ, FNOG, FIKG, NIKO, JOPD, JKCD, OKCP, AEGJ, NICP, HNPD, EBKG, ABKJ, HICD, ABCD.
Hence, the fourth option is correct.
Hello aspirant,
The Indian Institute of Technology, located in Delhi, provides studies at the undergraduate, graduate, and doctorate levels. There are full-time, online, and part-time options for IIT Delhi courses. The engineering and architecture, sciences, arts, humanities and social sciences, management and business administration, and education streams are among the many that offer courses at IIT Delhi. B.Tech and B.Tech M.Tech are among the IIT Delhi UG courses; M. Tech, MS, and M.Sc. are among the IIT Delhi PG courses. The university also provides Ph.D.
For more information you can visit our site by clicking on the link given below.
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The Indian Institute of Technology in Delhi provides programs at the undergraduate, graduate, and doctorate levels. There are full-time, online, and part-time course options at IIT Delhi. Engineering and architecture, science, the arts, humanities, and social sciences, management and business administration, and education are just a few of the fields in which IIT Delhi offers courses. B.Tech and B.Tech MTech are among the IIT Delhi UG courses, whilst M. Tech, MS, and M.Sc are PG programs. Additionally, the university provides doctoral degrees. The applicant must be eligible for admission to IIT Delhi. The cost and prerequisites at IIT Delhi vary depending on the course an applicant choose. The tuition at IIT Delhi is between Rs 60,650 and Rs 9,02,000.
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