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Explain Slip-ring
Slip-ring (or phase- wound) rotor having of a slotted laminated core of sheet steel. A three- phase winding is placed in the rotor slots. The rotor winding is usually linked in star, though it might be connected in delta also. The free-ends of the rotor windings are brought out, and linked to three slip-rings mounted on the rotor shaft. In this case, depending upon the necessity any external resistance can be added in the rotor circuit.
Determine the Brewster's angle for a glass slab (µ=1.5) immersed in water (µ=4/3).
A zinc plate is attached to the knob of a negatively charged electroscope. What will occur to the leaves of the electroscope when ultraviolet light is shown on the zinc plate
For circuit demonstrated in figure, draw waveform of output voltage V O . Suppose ideal diode D and lossless capacitor C. Name of the circuit given in figure is Positive C
composition of two SHM at right angle to each other and having time period in the ratio of 1: 2
SPEED: The distance covered by a body in unit time is known as speed. It is represented by V.
Explain the applications of polarization of light? Write any four applications of interference of light. Illustrate how plane polarized light obtained by reflection.
Q. What is ionisation potential energy? For hydrogen atom the energy necessary to remove an electron from first orbit to its outermost orbit (n=∞) is 13.6-0 = 13.6eV. This ene
It is a parameter of an insulator that defInes the maximum voltage difference that can be applied across the material before the insulator collapse and conducts.
Na + ion is isoelectronic with: (1) Li + (2) Mg +2 (3) Ca +2 (4) Ba +2 Ans:(b) Mg +2
Capacitance: If we increase the voltage between the plates, the charge increases, but the ratio of charge to voltage remains the same. This ratio gives the capacitance (C) of
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