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Q1. A circular loop of radius 11 cm lies in the plane of the paper. A constant magnetic field of 250 mT is directed into the paper. Find out the magnetic flux through the loop. (b) Same geometry as above but now the magnetic field decreases uniformly from 250 mT to zero in 0.5 s. Find the induced emf and the polarity of the induced current. (c) The circular loop is a copper wire of resistance 0.1 Ω. Illustrate the graph of current versus time.
Q2. A 3.57 kg block is drawn at constant speed 4.06 m along a horizontal floor by a rope exerting a 7.68 N force at angle of 15 degree above the horizontal. Work out the coefficient of kinetic friction between block and floor.
A train at rest emits a sound at a frequency of 1045 Hz. An observer in a car travels away from the sound source at a speed of 37 m/s. What is the frequency heard by the observer? Imagine the speed of sound in air to be 340 m/s.
What mass of stone is necessary if the temperature is not to drop below 18.5°C overnight. Sunlight shining in during the daytime is absorbed by the floor, interior walls, and objects in the room, raising their temperature to 37.5°C.
What is the linear speed of the phonograph needle
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Outline what you know about Plasmonics? Outline what you know about Raman spectroscopy and surface enhanced Raman spectroscopy?
A submarine dives 90.0 m at an angle of 8.0° below the horizontal. What are the horizontal and vertical components of submarine's displacement? (Imagine that upward and the direction of the submarine's horizontal motion is positive.)
What is force necessary on one end of apparatus in order to lift the car? How much work is done lifting the car?
At the same time, the stationary trumpeter played the same note. Ballot heard 3.0 beats per second. How fast was the train moving toward him.
Write down the original position of the system
What is mechanical energy
Whole blood has a surface tension of 0.068 N/M & a density of 1050kgm-3.what weight can whole blood rise in a capillary blood vessel that has radius 2.0 x 10-6 if the contact is zero.
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