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How does laser printer works?
When a text or image is entered into the CPU, it makes a series of varying voltages. This controls a LED (light emitting diode) in the printer. This produces flashes of laser, when it falls on a charged photo conducting drum. The area corresponds the text or image will either be neutralized or oppositely charged. A toner which has the similar charge as the background is sprayed onto it. It only sticks to the text or image and is repelled by the background.
A battery of emf 2v and internal resistance 0.1 ohm is being charged with a current of 5A. In what direction will the current will flow inside the battery? Ans) In charging cond
In the equal distance method of a deflection magnetometer, the deflections produced by two bar magnets are 30 o and 60 o . Determine the ratio of their magnetic moments?
just after cutting of spring will extension becomes zero or not
Define the construction of ultrasonic magnetostriction method. Construction: The ends of the ferromagnetic rod A and B are wound through the coils L 1 and L as given in fi
a) Orbital movement of electrons b) On the source of orbital motion of electrons c) These are repelled in an external magnetic field i.e. have a tendency to g
Write down a short note on the discovery of neutron. Show the uses of radioisotopes.
Heat is the energy that is operated because of differences in temperature among the body and the surrounding. The unit of heat energy is Joule. The basic difference among study
Electric Circuit: The path by which an electric current passed is known as an electric circuit. The electric appliances are known as resistance.
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A simple wheel and axle Remove the cover from a pencil sharpener and bind a string tightly around the end of the shaft. Bind a weight of various kilograms to the end of the str
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