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(a) With the help of a labelled diagram, define the principle and working of a moving coil galvanometer.
(b) Two parallel coaxial circular coils of equal radius 'R' and equal number of turns 'N', carry equal currents 'I' in the similar direction and are separated by a distance '2R'. Find the magnitude and direction of the net magnetic field formed at the mid-point of the line joining their centres
What is the ratio of mass of an electron to the mass of a proton: (1) 1 : 2 (2) 1 : 1 (3) 1 : 1837 (4) 1 : 3 Ans: 1: 1837
What is the work done to take a particle of mass m from surface of the earth to a height equal to 2R (R=radius of earth )? Ans) Initial PE= - GMm/R Final PE = - GMm/3R
Fifth Harmonic-Standing Waves on a String There are a variety of patterns that could be generates through vibrations inside a string, slinky, or rope. Every pattern corresponds
For the system shown below the gain, G, of block A is variable and can be set as low as 100 and as high as 500. The only problem with block A is that its gain fluctuates with high
Q) why we cant use the nuclear reactor concept in making fuel for our usages? Ans) Beacause nuclear reacters produse a huge energy which can''t be in our control and we can''t co
If we have to strain a ferromagnetic crystal along certain direction, we would change the inter atomic spacing not only along this direction but also in other direction. And hence
a) A uniform mild steel ring has a diameter of 50mm and a cross-sectional area of 1cm 2 . Determine the mmf essential to produce a flux of 50µWb in the ring. (b) I
Is low attenuation is a sign of good quality fibers? Usually yes low attenuation is a sign of good quality fibers, but within lighting fiber optics the manufacturer's attenua
A coil of inductance 100 mH and resistance 800Ω is connected in parallel with a variable capacitor across a 12V, 5kHz supply. Determine for the condition when the supply curre
explain electromagnetic induction
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