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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 said to have zero-error which is similar to the cap reading with the gap closed. This error is positive when value is zero line or reference line of the cap lies above the line of graduation and corresponding corrections will be just opposite or vice-versa.
What do you mean by a shunt? Reduce expressions for the current flowing through the shunt resistance and galvanometer. Describe the principle on which a transformer works. Defin
What is the net force on a conductor of length l carrying current 'i' when it is situated in a magnetic field of induction B? When is it maximum? State and explain Fleming's l
what is newtons law
Length contraction (relativity of length) is the length of a body moving with a relativistic velocity v = c relative to an observer is contracted by a factor in the direction of m
What is magnetic moment of a bar magnet 1. When a bar magnet of pole strength (m) and length (2l) is suspended freely in air,it always turns along the magnetic north (N) and S
Explain Circular and Orbital Motion Let's start by looking at circular motion with constant speed. Can there be acceleration in this problem? Yes, velocity includes speed and
Fermat's principle; principle of least time (P. de Fermat): The principle put by P. de Fermat, which states the path taken through a ray of light among any two points into a s
Explain about the monochromaticity of laser. Monochromaticity: The light emitted through a laser is monochromatic, that is this is of one wavelength (colour). Although in ca
(i) A number system which has only two characters i.e. 0 (Low value) and 1 (High value) is known as binary system (ii) The electrical circuit which operates only in these two di
Tin: Atomic number 50 Symbol Sn Atomic weight 118.69 Discovery Known since ancient
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