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A square wire of side 3 cm is placed 25 ...

A square wire of side 3 cm is placed 25 cm away from a concave mirror of focal length 10 c.What is the area enclosed by the imge of the wire?(The entre of the wire is on teh axis of he mirror,with its two sides normal to he axis).

A

`4.0 cm^2`

B

`9.0 cm^2`

C

`4.5 cm^2`

D

`20.25 cm^2`.

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. A ray of light travels from the point A to B with a uniform speed.On i...

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  2. A boy is running towards a plane mirror with a speed of 2 m s^(-1).Wit...

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  3. A square wire of side 3 cm is placed 25 cm away from a concave mirror ...

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  4. If a concave mirror of focal length f produces a real image n times th...

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  5. A concave mirror of focal length f ( in air ) is immersed in water (mu...

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  6. A convex mirror of focal elongth f produces an image magnified m times...

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  7. A convex mirror forms an imge,which is 1//n times the size of the obje...

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  8. A short linear object of length b lies along the axis of a concave mir...

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  9. A diminihsed virtual image can be produced only with

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  10. A virtual image larger than the object can be produced by

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  11. The field of the view is maximum for

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  12. In case of spherical mirrors,which of the followed do/does not depend ...

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  13. Light appears to travel in a straight lines,since

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  14. If the light prpagating along a straight ine bends by a small but fixe...

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  15. A glass slab of thickness 4 cm contains the same number of waves as 5 ...

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  16. The lateral shift produced in a parallel sided glass slab depends on

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  17. Light passing from air to glass is refracted ,as is light passing from...

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  18. A person swimming at the bottom of a swimming pool lookds up to the di...

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  19. Total interval reflection takes place, when light travels from

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  20. A ray of light from a sodium lamp undergoes total internal reflection....

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