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Q. Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
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Q. The device used to convert solar energy into electricity is
Q. The ''Greenhouse effect' is mainly due to increase in atmospheric
Q. The unit of energy in MKS system is
Q. Which among the given caused radioactive pollution along the coast of Kerala -
Q. Which colour of light shows maximum deviation when passed through a prism ?
Q. When there are no external forces the shape of a liquid drop is determined by
Q. Magnetism at the centre of a bar magnet is
Q. Mach number‖ is a measure of which of the following?
Q. A falling drop of rain water ac-quires the spherical shape due to
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