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Two resistances have lengths in the ratio 1:4 and radius 1:2,specific resistances in ratio 3:1. compare their resistances.Solution)Given lengths l1=1 l2=4Given radius r1=1 r2=2 Given specific resistances Ρ(rho)1=3 Ρ2= 1we know the R=Ρl/A R1/R2=3/1.
The drag on a 30-ft long, vertical, 1.25-ft diameter pole subjected to a 30 mph air wind is to be determined with a model study. It is expected that the drag is a function of the p
What is meant by tunnelling phenomenon? A tunnel diode is a high conductivity two-terminal P-N junction doped heavily about 1,000 times higher than a conventional junction diod
A car is moving along a straight horizontal road at a speed of 20 meters per second. The brakes are applied and a constant force of 5000 Newtons decelerates the car to a stop in 1
in what depends the charge that each material has? like glass positive; polystyrene negative; and ebonite negative; at the moment of charge a rod of those materials...?
How does the distance between fringes in Young's double slit experiment change. a) If the colour of the light is changed from red to blue? b) If the slit separation is incre
If conductors carries current in similar direction, then force among them will be attractive. If conductor carries current in reverse direction, then force among them will be repul
The magnitude of a charge, q, is to be determined by transferring the charge equally to two pith balls. Each of the pith balls has a mass of m, and is suspended by an insulating th
What is the difference between circular and rotation motion
Concept of wave front The basis of Huygens wave theory of light is his principle concerning construction of wave front. When a disturbance from a light source travels i
Why does heated air expand? Temperature is often explained as the average thermal energy of the substance at hand. Therefore the hotter a substance is the more thermal energy i
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