Ball Bearings Are Used in bicycles, cars, etc., Because
Ball bearings are used in bicycles, cars, etc., because(2013) a) the actual between the is increased area of contact wheel and axle b) the effective between the is increased area of contact wheel and axle c) the effective between the is reduced area of contact wheel and axle d) None of the above statements is […]
Which of the above are optical illusions?
Consider the following phenomena: 1. Size of the sun at dusk 2. Colour of the sun at dawn 3. Moon being visible at dawn 4. Twinkle of stars in the sky 5. Polestar being visible in the sky Which of the above are optical illusions?(2013) a) 1, 2 and 3 b) 3, 4 and 5 […]
Which of the following physical phenomena are responsible for this?
Rainbow is produced when sunlight falls on drops of rain. Which of the following physical phenomena are responsible for this? 1. Dispersion 2. Refraction 3. Internal reflection Select the correct answer using the codes given below.(2013) a) 1 and 2 only b) 2 and 3 only c) 1 and 3 only d) 1, 2 and […]
Many Transplanted Seedlings do not grow because
Many transplanted seedlings do not grow because(2013) a) the new soil does not contain favourable minerals b) most of the root hairs grip the new soil too hard c) most of the root hairs are lost during transplantation d) leaves get damaged during transplantation Answer: C Many transplanted seedlings do not grow because most of […]
Select the correct answer using the codes given below
Which of the following statements is / are correct? 1. Viruses lack enzymes necessary for the generation of energy. 2. Viruses can be cultured in any synthetic medium. 3. Viruses are transmitted from one organism to another by biological vectors only. Select the correct answer using the codes given below.(2013) a) 1 only b) 2 […]
The known forces of nature can be divided into four classes, viz, gravity electromagnetism, weak nuclear force and strong nuclear force
The known forces of nature can be divided into four classes, viz, gravity electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?(2013) a) Gravity is the strongest of the four b) Electromagnetism act only on particles with an electric charge c) Weak nuclear […]
Which of the above diseases has/have been eradicated in India?
Consider the following diseases 1. Diphtheria 2. Chickenpox 3. Smallpox Which of the above diseases has/have been eradicated in India?(2014) a) 1 and 2 only b) 3 only c) 1, 2 and 3 d) None ANswer: B Smallpox has been eliminated from India and the world.
What is /are the importance/importances of discovering this particle?
The efforts to detect the existence of Higgs boson particle have become frequent news in the recent past. What is /are the importance/importances of discovering this particle? 1. It will enable us to understand as to why elementary particles have mass. 2. It will enable us in the near future to develop the technology to […]
In addition to fingerprint scanning, which of the following can be used in the biometric identification of a person?
In addition to fingerprint scanning, which of the following can be used in the biometric identification of a person? 1. Iris scanning 2. Retinal scanning 3. Voice recognition Select the correct answer using the code given below.(2014) a) 1 only b) 2 and 3 only c) 1 and 3 only d) 1, 2 and 3 […]
Which of the following kinds of organism is / are known as decomposer organism/organisms?
With reference to the food chains in ecosystems, which of the following kinds of organism is / are known as decomposer organism/organisms? 1. Virus 2. Fungi 3. Bacteria Select the correct answer using the codes given below.(2013) a) 1 only b) 2 and 3 only c) 1 and 3 only d) 1, 2 and 3 […]