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The average distance of an electron in an atom from its nucleus is of the order of: (1) 10 6 m (2) 10 -6 m (3) 10 -10 m (4)10 -15 m Ans: (3) 10 -10 m
Artificial satellites 1. Satellites help to develop reliable communication links between different countries separated by large distances on the globe. The communications inclu
A toy train moves in a circle of 8 meters radius with a speed of 4 meters per second. What is the magnitude of the acceleration of the train? Ans: The magnitude of the acce
Draw a free-body diagram for a goldfish that is motionless in the middle of a fish bowl. Recognize the forces acting on the fish. Show the direction of the net force on the f
Illustrate the A and B coefficients of Einstein in shortly. Einstein’s A and B coefficients: Einstein suggested a mathematical expression for the existence of stimulated emi
What is the position vector of point c in equilateral triangle?
while taking readings in a deflection magnetometer the deflection should be between 30 degree and 60 degree.why?
The Doppler Effect shows that the spectrum of light from a visible body moving AWAY from the Earth will experience a shift in frequency when viewed from Earth. This definite s
If two lines of dissimilar metals are connected at their ends so as to form two junctions, then the resulting arrangement is known as a "Thermo couple".
a) Here temperature difference of junction is used to produce thermo e.m.f. and vice-versa. b) This effect produced when junctions of a thermocouple are kept at dissimilar tempe
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