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Three similar coils, each having a resistance of 8 and an inductive reactance of 8 are connected
(a) in star and
(b) in delta, across a 415V, 3-phase supply.
Measure for every connection the readings on each of two wattmeters connected to measure the power by the two-wattmeter method.
A 12V battery is connected in a circuit having three series-connected resistors having resistances of 4 Ω,9 Ω and 11 Ω. Verify the current flowing through and the p.d. acr
Calculate the top heat-loss coefficient for a solar collector with a single glass cover having the following specifications (neglect edge effects), also calculate the ambient air t
What is electric flux? Write its S.I. units. Using Gauss's theorem, assume an expression for the electric field at a point because of a uniformly charged infinite plane sheet.
A medium is characterised by relative permittivity ε r =45 and relative permeability μ r =5. Determine the speed of e-m wave in the refractive and medium index of the medium.
The plates of a parallel plate capacitor are 5 mm apart and 2 m 2 in area. The plates are in vacuum. A potential difference of 10000 Volts is applied across the capacitor. Calcu
Q. Define: grating element. The combined width of a slit as well as a ruling in a plane diffraction grating is called as a grating element.
In the nucleus of 20 Ca 40 there are: (1) 40 protons and 20 electrons (2) 20 protons and 40 electrons (3) 20 protons and 20 neutrons (4) 20 protons and 40 neutrons
In the figure below the closed surfaces A and B appear as closed curves. Find the flux through closed surface B.
Two parallel plates having a p.d. of 200V among them are spaced 0.8mm apart. What is the electric field strength? Find also the flux density when the dielectric among the p
Right-hand rule: A trick for right-handed coordinate systems to find out which way the cross product of two 3-vectors will be directed. There are few forms of this rule, and t
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