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1. A screw gauge consists of U- shaped metallic frame F. To one end of this frame, a flat shaft is fixed. On the opposite end of a hollow long cylinder C is fixed.2. The hollow cylinder has fine threads cut inside it and it serves as the nut.On the outer surface of this hollow cylinder, a line parallel to its axis, called index line is drawn and is divided into some equal divisions (1 mm or 0.5 mm). This serves as the pitch scale (P).3. A screw with a flat tip (shaft) having threads exactly identical to the threads cut inside the cylinder, moves through the cylinder C. To the other end of the screw, a milled head M is connected.4. To this milled head one end of a barrel B (another hollow cylinder) is connected. This Barrel B forms a jacket to the first hollow cylinder C.5. The other end of the barrel is tapered and has 100 or 50 equal divisions on it. This is called the head scale (H).6. When the two flat shafts exactly opposite to each other , are in contact, the distance between them is zero. In this position, the edge of the head scale must coincide with the zeroth division of the pitch scale.Further, the index line will be coinciding with the zero of the head scale
In this case both source and screen are effectively at infinite distance from the diffracting device. Basic types: Diffraction at single slit, double slit and diffracting gratin
Voltmeter: An electromechanical instrument which is used to calculate potential difference among two points is known as voltmeter. Voltmeter is a modified form of a galvanom
Q. Does sunlight reflected off a mirror raise the temperature of the sun-rays? Answer:- A standard planar mirror will not raise the energy contained in the rays that refle
How we can calculate the magnitude of electric field above a sheet charged with voltage V where we know the bulk conductivity and relative permittivity of the space above the sheet
An electron beam projected along +X-axis, experiences a force because of a magnetic field along the +Y-axis. What is the direction of the magnetic field?
Working of Compound Microscope: The object under examination is placed in front of the objective. The objective forms it's real and inverted image with in the focal length of t
The maximum value of electric field in an electromagnetic wave is 800V/m. Determine the maximum value of magnetic intensity and the average value of pointing vector.
MOTION: A body is said to be in motion if it alters its position with respect to its surroundings.
All the traveling waves satisfy a differential equation which is known as the wave equation
Physical arrangement of resistors: Before we look at some problems it is necessary to warn you that physical appearances can be deceptive. When components are mounted they are
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