UPSC Government Jobs Exams

A microwave oven uses wave with a
(a) large wavelength in the
invisible range
(b) small wavelength in the visible
range
(c) large wavelength in the visible
range
(d) small wavelength in the
invisible range

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UPSC Other Question
A television remote uses
(a) infrared waves
(b) cosmic waves
(c) microwaves
(d) ether waves A thin pin of iron can be made to
float on water (drinking) in a bowl.
This phenomenon is due to the
(a) surface tension of water
(b) viscous nature of water
(c) presence of ionic bonds in
water molecules
(d) presence of covalent bonds in
water molecules