Recent content by harsh95

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    Is Back EMF Always Equal to Battery EMF in Inductive Circuits?

    But I don't understand why the back emf generated by 18V i.e same as the battery. We say that inductur has no resistance of itself. Then there is no potential drop when the current is steady And when the current is changing then EMF is induced which is opposes the cause that produces it . And...
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    Is Back EMF Always Equal to Battery EMF in Inductive Circuits?

    Homework Statement A coil of inductance 0.5 H is connected to a 18V battery. Calculate the rate of growth of current? Homework Equations E=-L(dI/dt) The Attempt at a Solution Actually I have the solution but the problem is that in the book they have assumed that the back emf that would develop...
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    Head On Collision: Cars vs Trucks

    Formula for momentum p=mv If they are at rest then their momenta will be 0 because velocity is 0 "Suppose you have one mass M that is ten times another mass m. If mass M is traveling at speed V, what speed would m have to travel in order to have the same magnitude of momentum?" Then it...
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    Refraction of Light: Isosceles Prism of 120°, Refractive Index 1.44

    An isosceles prism of angle 120* has a refractive index 1.44.Two parallel monochromatic rays enter the prism parallel to each other as shown in figure.the ray emerge from the opposite faces- (A)Are parallel to each other (B)are diverging (C) make an angle 2[sin^ -1(0.72)-30*] with each other...
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    Head On Collision: Cars vs Trucks

    Sir,if it is given that mass of truck is greater then would it have a greater momenta? Also the collision lasts for 1 second,so how they have equal momenta? Could please tell me the answer for (c) and (d) I am preparing for Science Olympiad and "Law of motion" is one of the chapter in...
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    Head On Collision: Cars vs Trucks

    For (a) Due to 3rd law of motion I think both will experience same force of impact! Every action has equal and opp. reaction. For (b) Because truck's mass is more and velocity being same,so I think it will experience greater change in momentum.But I am unable to proof this with equation! For...
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    Head On Collision: Cars vs Trucks

    A large truck and a car,both moving with a velocity of magnitude "V",have a head on collision and both of them come to halt after that.If the collision lasts for 1s: (a)Which vehicle experiences the greater force of impact? (b)Which vehicle experiences the greater change in momentum? (c)Which...