What is supersonic?
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what is mariners compass
What is the role of a transformer in a rectifier?
What is the effect of using two converging lenses in one optical instrument?
A coil consisting of 200 turns of wire has its ends connected to a circuit such that the total resistance of the coil and the circuit is 2.0 ohm. There is no source of e.m.f. in the circuit. Each turn of the coil is a square of side 18 cm, and a uniform magnetic field directed perpendicular to the plane of the coil is turned on. If the field changes linearly from 0 to 0.5 T in 0.8 s, what is the magnitude of the current in the coil while the field is changing?
Why does the specific gravity of milk increase, when cream is removed from the milk ?
Explain the Electric dynamo ?
Which of the surfaces of a thermos flask are silvered and why?
What are isotopes?
mitre gears are same as
What is Alloy ?
heat cannot pass from a cooler substance to a warmer substance without some other process being involved. This is an example of which law of thermodynamics?
How is nuclear fission different from nuclear fusion?