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Physics

Physics
Which of the following liquids is most viscous?

Oil
Milk
Water
Petrol

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Physics
A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of the emf's is :

0.20902777777778
0.12638888888889
0.12777777777778
0.21111111111111

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Physics
In which one of the following the phenomenon of total internal reflection of light is used ?

Formation of mirage
Formation of rainbow
Twinkling of stars
Working of binoculars

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Physics
Ball pen functions on the principle of :

Surface tension
Gravitational force
Viscosity
Boyle's Law

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Physics
Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2

14 m/s
1.4 km/s
0.14 m/s
140 m/s

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Physics
Fat can be seperated from milk in a cream seperator because of :

Cohesive Force
Centrifugal Force
Gravitational Force
Centripetal Force

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