Q661
Open questionWhat is refractive index ?
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Q662
Open questionA star appears twinkling in the sky because of
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Q663
Open questionWhat type of lens is used in a magnifying glass
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Q664
Open questionTime of exposure required for taking photograph of an object depends upon the
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Q665
Open questionA concave lens always forms
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Q666
Open questionA concave lens always forms an image which is
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Q667
Open questionWhich one of the following determines the sharpness of image in a camera ?
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Q668
Open questionDioptre is the unit of
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Q669
Open questionThe part of the eye having the largest refractive index is :
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Q670
Open questionVehicles use ________ to see the objects coming from behind.
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Q671
Open questionWhich alternative energy source is exhaustible?
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Q672
Open questionWhich of the following is a Non Renewable Resource of Energy?
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Q673
Open questionWhich of the following is a renewable resource of energy?
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Q674
Open questionThe group of solar cells joined together in a definite pattern is called a
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Q675
Open questionWhich of the following uses a Non Renewable Energy Source?
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Q676
Open questionSolar cells work on the principle of
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Q677
Open questionWind and solar energy are examples of
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Q678
Open questionElectrostatic precipitator is used to control the pollution of
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Q679
Open questionHydro-electric power is a:
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Q680
Open questionEnergy that is produced commercially from coal is called
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