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Q. What is efficiency of a transformer?
Efficiency of a transformer is described as the ratio of output power to the input power.
η= output power / input power
When a person stands on a scale in an elevator at rest, the scale reads 800 newtons. When the elevator is allowed to fall freely with acceleration of gravity, the scale reads o
1 Coulumb Charges: 1 coulumb charge is that amount of charge which when placed 1 m from an identical charge in vacuum which repels it with a force of 8.99 × 109 N.
Draw the electric field figure as viewed by a person positioned on the positive x-axis who is looking back toward the origin for the case of an electric field characterized by the
Portrayed is a ray from an object which heads toward and then into a lens. Suppose if the ray is a principal ray where does it go from there? Ans: This is the simple p
How can ultrasonic waves be detected Kundt’s tube method? Ultrasonic waves can be detected by Kundt’s tube. There at the nodes, lycopodium powder collects into the form of heap
Illustrate the c-scan presentation of test specimen? C-mode: The C-scan presentation gives a plan-type (2D) view of the location and size of test specimen characteristics. T
Question 1 Discuss the physical characteristics of an X-ray beam. Write a note on factors influencing the quality and intensity of the X-ray beam Question 2 Explain the const
Explain the working of a refrigerator A refrigerator is the reverse of a heat engine. Here the working substance extracts heat Q2 from the cold reservoir at temperature T2, som
Q. What is excitation potential energy of an atom? The energy required to increase an atom from its normal state into an excited state is called excitation potential energy of
A negative point charge of 10 -6 coulomb is located in air at the origin of a rectangular coordinate system. A second negative point charge of 10 -4 is situated on the positive x
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