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An atom has 26 electrons and its atomic weight is 56. The number of neutrons in the nucleus of the atom will be:
(1) 26
(2) 30
(3) 36
(4)56
Ans: (b)30
Give the graphical representation of the end on view of plane polarized light and unpolarized light.
What is the difference between diffraction and interference? Diffraction is the bending of waves around an obstacle, whereas interference is the meeting of two waves. For exam
Electrical Bell: 1.An electromagnet, which is made by winding insulated copper wire on a soft iron core. 2.An armature which is soft iron strip with spring. 3.A soft iron
Evaluate how many electrons flow through a wire when 1A current passes for 1 millisecond? Write two basic differences between p.d. and emf.
A mild steel closed magnetic circuit has a mean length of 75mm and a cross-sectional area of 320.2mm 2 . A current of 0.40 a flows in a coil wound uniformly around the circuit
A set of open circuit test and short circuit test have been performed on a transformer. A supply voltage of 480 V is applied to the primary side of the transformer and the followin
Explain Buoyancy in Air The same buoyancy happens in air. This is how hot air balloons fly. By heating the air and lowering the density of the air in the balloon, the balloon f
Properties of Lines of Flux To make the imaginary lines of flux describe the behaviour of the magnetic field we must give them appropriate properties. Thus lines of flux have
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The Time Base Control 3 Shows the effect of changing the time base control on the display when there is an input voltage varying in time when the frequency of the voltage is hi
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