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candela; cd
The basic SI unit of luminous intensity described as the luminous intensity in a given direction of a source which emits monochromatic photons of frequency 540 x 1012 Hz and contains a radiant intensity in that direction of 1/683 W/sr.
Q. Why nichrome is used as heating element in electric heating devices? Nichrome, an alloy of nickel as well as chromium is used as the heating element for the following reaso
Q. What are coherent sources? Two sources are alleged to be coherent if they emit light waves of the same wave length and start with same phase or have a constant phase differ
What are capacitors used for in induction coils
bcs theory of superconductivity.
One of the Maxwell's e-m equations involves the curl of the electric field. Write down the equation and mention the law of electromagnetism which is shown by the equation.
discuss the orgin of energy band in solids
Mercury is poured into a U-tube as shown in Figure given below. 100g of water is then poured into the right hand side of the tube. The density of mercury is 13.6g/cm 3 . What heigh
A circuit contains of a 10 volt battery connected in series with a 4 ohm resistor and a 6 ohm resistor. Why is it complete nonsense to say that 4 volts goes through the 4 ohm resis
i do not know the problems solving techniques
In physics, the phrase thermal equilibrium is used sometimes in the common parlance of the ordinary language of physical discourse, and sometimes as a specialized technical term in
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