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Physics

Physics
An atom with more neutrons than protons is called

Compound
Element
None of these
Isotope

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Physics
Which colour is the complementary colour of yellow ?

Orange
Green
Red
Blue

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Physics
Sound waves in air are

polarised
electromagnetic
longitudinal
transverse

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Physics
When a light wave is reflected from a mirror, there is a change in its

Amplitude
Velocity
Wavelength
Frequency

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Physics
Fish and other aquatic creatures can live inside a deep frozen pond because

Fish are cold-blooded animals
Ice is a bad conductor of heat
They can adapt themselves to live in ice
There will always be water just beneath the ice level

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Physics
A copper wire of radius r and length l has a resistance of R. A second copper wire with radius 2r and length l is taken and the two wires are joined in a parallel combination. The resultant resistance of the parallel combination of the two wires will be

R/5
5 R
5 R/4
4 R/5

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