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A silver cup is plasted with silver by passing 0.001 F of electricity . The amount of Ag deposited is (Ag = 107.8)

Which method is more accurate in the determination of f for a concave mirror. (i) u versus v or (ii) (1)/(u) versus (1)/(v) graphs ?

A stone of weight W is thrown straight up from the ground with an intial speed u. If a drag force of constant magnitude f acts - on the same through out its flight , the speed of stone just before reaching the ground is (1) usqrt((W-f)/W) (2) usqrt((W+f)/f) (3) u sqrt((W+f)/(W-f)) (4) u sqrt((W-f)/(W+f))

The initial velocity of a particle is u (at t = 0) and the acceleration f is given by f = at. Which of the following relation is valid?

Assertion : The focal length of the mirrorr is f and distance of the object from the focus is u , the magnification of the mirror is f//u . Reason : Magnification =("Size of the image")/("Size of object" )

The focal length of a less is given by the formula (1)/(f)=(1)/(u)+(1)/(v) . Make f as the subject of the formula. if u=20cm and v=30, then find f. The following steps are involved in solving the above problem. Arrange them in sequential order. (A) Given (1)/(f)=(1)/(u)+(1)/(v) (B) rArr f=(uv)/(u+v) (C) f=(20xx30)/(20+30)=(600)/(50)=12 cm. (D) rArr (1)/(f)=(v+u)/(uv)