Ram planned an activity to observe an object through pipes as shown in figure,so that he could see objects which he could not directly see.c) Indicate the positions of the mirrors in the figure.

Ram planned an activity to observe an object through pipes as shown in figure,so that he could see objects which he could not directly see.b)If any of the mirrors is removed,will he be able to see the objects?

Ram planned an activity to observe an object through pipes as shown in figure,so that he could see objects which he could not directly see.a) Mention how many mirrors should he use to see the object.

A man whose eye-level is 2 m above the ground wishes to find the height of a tree. He places a mirror horizontally on the ground 20 m from the tree and finds that if he stands at a point C which is 4m from the mirror B, he can see the reflection of the top of the tree. How height is the tree ?

A 6-volt battery of negligible internal resistance is connected across a uniform wire AB of length 100cm. The positive terminal of another battery of emf 4V and internal resistance 1(Omega) is joined to the point A as shown in figure.Take the potential at B to be zero. (a) What are the potentials at the poits A and C ? (b) At which point D of the wire AB, the potential is equal to the potential at C?(c ) If the point C and D are connected by a wire, what will be the current through it ? (d) If the 4V battery is replaced by 7.5V battery,wht would be the answer of parts (a) and (b) ?

(a) What is the picture about? (b) What does the picture of the last man indicate to us and what was he called? (c ) How did the change happen from first man to the last man as shown in the figure?

At which position will you keep an object in front of a convex lens so as to get a real image of the same size as that of the object? Draw a figure.

A small block of mass m is kept on a bigger block of mass M which is attached to a vertical spring of spring constant k as shown in the figure. The system oscilates verticaly. a.Find the resultant force on the smaller block when it is displaced through a distance x above its equilibrium position. b. find the normal force on the smaller blok at this position. When is this force smallest smaller block at this position. When is this force smallest in magnitude? c. What can be the maximum amplitude with which the two blocks may oscillate together?

Figure shows a man of mass 60 kg standing on a light weighting machine kept in a box of mass 30 kg. The box is hanging from a pulley fixed to the ceiling through a light rope, the other end of which is held by the man himself. If the man manages to keep the box at rest, what is the weight shown by the machine? What force should he exert on the rope to get his correct weight on the machine?