What is the Difference Between Bluetooth and Wi-Fi Devices
What is the difference between Bluetooth and Wi-Fi devices?(2011) a) Bluetooth uses 2.4 GHz radio frequency band, whereas-Wi-Fi can use 2.4 GHz or 5 GHz frequency band b) Bluetooth is used for Wireless Local Area Networks (WLAN) only, whereas Wi-Fi is used for Wireless Wide Area Networks (WWAN) only c) When information is transmitted between […]
Both Bluetooth and Wi-Fi Don’t Require Line of Sight.
Both Bluetooth and Wi-Fi don’t require line of sight. Aspartame is an artificial sweetener sold in the market. It consists of amino acids and provides calories like other amino acids. Yet, it is used as a low-calorie sweetening agent in food items. What is the basis of this use?(2011) a) Aspartame is as sweet as […]
What is the Difference Between a CFL and an LED lamp?
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 […]
A Married Couple Adopted a Male Child, A few years later; Twin Boys Were Born to them
A married couple adopted a male child, A few years later; twin boys were born to them. The blood group of the couple is AB positive and O negative. The blood group of the three sons is A positive, B positive, and O positive. The blood group of the adopted son is(2011) a) O positive […]
A New Optical Disc Format Known As the Blu-ray Disc (BD) is Becoming Popular. In what way is it different from the traditional DVD?(2011)
A new optical disc format known as the Blu-ray Disc (BD) is becoming popular. In what way is it different from the traditional DVD?(2011) 1. DVD supports Standard Definition video while BD supports High Definition video. 2. Compared to a DVD, the BD format has several times more storage capacity. 3. Thickness of BD is […]
An Artificial Satellite Orbiting Around the Earth Does Not Fall Down. This is so because the attraction Of Earth(2011)
An artificial satellite orbiting around the Earth does not fall down. This is so because the attraction Of Earth(2011) a) does not exist at such distance b) is neutralized by the attraction of the moon c) provides the necessary speed for its steady motion d) provides the necessary acceleration for its motion Answer: D Self […]
Satellites Used For Telecommunication Relay Are Kept In a Geostationary Orbit?
Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when: (2011) 1. The orbit is geosynchronous. 2. The orbit is circular. 3. The orbit lies in the plane of the Earth’s equator. 4. The orbit is at an altitude of 22,236 km. Select […]
Scientists Can Determine The Arrangement or Relative Positions of Genes or DNA Sequences on a Chromosome. How does this knowledge benefit us?
At present, scientists can determine the arrangement or relative positions of genes or DNA sequences on a chromosome. How does this knowledge benefit us? 1. It is possible to know the pedigree of livestock. 2. It is possible to understand the causes of all human diseases. 3. It is possible to develop disease-resistant animal breeds,(2011) […]
Which of the Statements Given Above is/are Correct? ( 2011 Science N tech)
1.They use living organisms as catalysts to generate electricity from certain substrates. 2.They use a variety of inorganic materials as substrates. 3.They can be installed in wastewater treatment plants to cleanse water and produce electricity.(2011) Which of the statements given above is/are correct? a) 1 only b) 2 and 3 only c) 1 and 3 […]
The Function of Heavy Water in a Nuclear Reactor Is to
The function of heavy water in a nuclear reactor is to(2011) a) Slow down the speed of neutrons b) Increase the speed of neutrons c) Cool down the reactor d) Stop the nuclear reaction Answer: A The function of heavy water in a nuclear reactor is to Slow down the speed of neutrons. Heavy water […]