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What are eddy currents? State how their effect is decreased in transformers.
(b) Verify the ef?ciency of a 15 kVA transformer for the following conditions:
(i) full load, unity power factor
(ii) 0.8 full load, unity power factor
(iii) half full load, 0.8 power factor.
Suppose that iron losses are 200Wand the full load copper loss is 300W.
1) The potential energy between two atoms can be represented as follows: where A and B are constants and r the interatomic separation distance in metres. Plot the potential ene
An electron is in a box of width 3*10^-10m.what are de broglies wavelength and magnitude of momentum of the electron if it is in A)n=1 level B)n=2 level C)n=3 level Ans) Use the
A child in danger of drowning in a river is being carried downstream by a current that has a speed of 2.75km/hr. The child is 0.620km from shore and 0.755km upstream of a boat land
What type of material in optical fibres used? Material in optical fibres: Optical fibres are generally made along with two kinds of materials that are glass (silica) and pla
The rate of modification of thermo emf with the change in the temperature of the hot junction is known as thermoelectric power.
AC Output Resistance in Common Emitter Configuration Ratio of change in collector-emitter voltage (?V CE ) to the change in collector current (?I C ) at constant base curren
Neutron is a fundamental particle which is necessary constituent of all nuclei except that of hydrogen molecule. It was discovered by Chadwick. (1) The charge of neutron: It is
a. Measure the force among two linear, parallel, long conductors carrying currents in opposite direction. b. Measure self inductances and mutual inductances among two co-axial s
Ques: A 12 volt battery is associated in series with an initially-uncharged 120 microfarad capacitor and a 25 ohm resistor. What is the current during the resistor at the ins
explain compound microscope
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