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A transformer takes a current of 1A when its primary is connected to a 300V, 50Hz supply, the secondary being on open-circuit. If the power absorbed is 120watts,
Determine
(a) the iron loss current,
(b) the power factor on no-load, and
(c) the magnetizing current
Your friend has gifted an earphone set to you. While music is on you will try to oppose the two ear phone pieces to attract. Task-I: Will they attract? If yes, why so?
Polygon of force This topic just builds on the previous Triangle of Forces. Consider three forces A, B and C. A and B can be added by drawing a triangle to give a re
A 12 volt battery is associated across a series combination of two capacitors C1 and C2. The capacitance of C2 is double that of C1.
a picture frame is hanging by two verticle strings the tention in the string are 3.8N and 4.4N find the weight of the picture frame
Y the charge n voltage. Remain constant ven we connect capacitors in series. N parallel. Respectively??
Ans) In the first one..... F=ma...the only force which acts is F...which causes an acc. of ''a'' to the body of mass m... and as the force=>F=ma but on the second... let .
In a perfect instrument the zeros of the major scale and circular scale coincides with each other, in that situation screw gauge has zero-error, or else the measurement device is s
Q When calculate Planck's constant, a student's calculations produce values of 5.78 × 10 -34 J·s and 7.29 × 10 -34 J·s. If the accepted value is 6.63 × 10 -34 J·s, what is
Do glass or polymer transmits the radiation? There is not a simple answer since it will always depend on the last use and working conditions of the system. Usually speaking gla
Cut an apple in two parts with inertia Secure a long sharp knife like as a carving knife. Cut into the apple with the knife unless you can pick them up together. Be sure to hav
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