(a) State and explain the law of conservation of energy with an example ? (b) Explain how, the total energy a swinging pendulum at any instant of time remains conserved. Illustrate your answer with the help of a labelled diagram.
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(a) How is sound produced? Explain with the help of an example. (b) How does sound from a sound producing body travel through air to reach our ears? Illustrate your answer with the help of a labelled diagram.
(a) What is wind ? What type of energy is possessed by wind ? (b) Explain how, wind energy can be used to generate electricity. Illustrate your answer with the help of a labelled diagram. (c ) State two advantages of using wind energy for generating electricity. (d) Mention two limitations of wind energy for generating electricity.
(a) How does control and coordination take place in plants? How does it differ from that in animals? (b) Name five stimuli which act on plants. Name the type of tropism produced by each one of these stimuli. (c) Define hydrotropism. Give one example of hydrotropism. State whether this example is of positive hydrotropism or negative hydrotropism, illustrate your answer with the help of labelled diagram.
LAKHMIR SINGH & MANJIT KAUR-MODEL TEST PAPER 5-Section B
