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A force of 25 N is applied vertically at the end of a wrench handle that is 45 cm long to tighten a bolt in the clockwise direction. What torque is required by the bolt to keep the wrench from turning?
In order to keep the wrench from turning, the torque on the bolt must be equivalent in magnitude but opposite in direction of the torque applied by the wrench.
conclution about friction is a necessary evil
Illustrate "Tangent law" in magnetism. Compare magnetic moment of two bar magnet in a tan A, tan B position by null method or equal distance method.
Write any four characteristics of electromagnetic waves. Give two uses each of 1. Radio-waves 2. Micro-waves.
(1) CAPACITANCE: The value of capacitance depends upon the area of conducting plates, thickness of dielectric material and its permittivity. The frequency of operation
It is the opposition offered by the material of the flux. Reluctance α mean length of flux path and reluctance α 1/cross section A Reluctance=1/μ 0 μ r A Here μ 0 a
Define in detail about the test and characteristics of good bricks. Tests for bricks 1. Absorption a brick is taken and it is weighed dry. It is then immersed in water for
Q. What are the changes that take place at the superconducting transition temperature? At the transition temperature the subsequent changes are observed (i) The electrical res
A ball moving with speed v collides with a horizontal smooth surface at an angle ? with normal to surface in the figure. If coefficient of restitution is ‘e’ , then find VELOCITY a
Why do magnetic field lines contract longitudinally and exert a lateral pressure?
Disadvantages of A.C. Transmission of power 1. An a.c. line needs more copper than a d.c. line. 2. The construction of an a.c. transmission line is more complex than d.c. tr
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