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In the concave reflector of a torch, the...

In the concave reflector of a torch, the bulb is placed :

A

between the pole and focus of reflector

B

at the focus of reflector

C

between focus and centre of curvature of reflector

D

at the cetre of curvature of reflector

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The correct Answer is:
B
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LAKHMIR SINGH & MANJIT KAUR-REFLECTION OF LIGHT -Exercise
  1. The image formed by a concave mirror is real, inverted and highly dimi...

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  2. The angle of incidence for a ray of light passing throught the centre ...

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  3. In the concave reflector of a torch, the bulb is placed :

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  4. The focal length of a small concave mirror is 2.5 cm. In order to use ...

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  5. An object is 100 mm in front of a concave mirror which produces an upr...

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  6. A virtual, erect and magnified image of an object is to be produced wi...

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  7. A concave mirror has a focal length of 25 cm. At which of the followin...

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  8. An object is placed at the following distances from a concave mirror o...

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  9. According to the "New Cartesian Sign Convention" for mirros, when sigh...

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  10. Which type of mirror has : (a) positive focal length ? (ii) negat...

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  11. What is the nature of a mirror having a focal length of, +10 cm ?

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  12. What kind of mirror can have a focal length of, -20 cm ?

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  13. In case of spherical mirrors, all distances are measured from………. .

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  14. What sign (+ve or -ve) has been given to the following on the basis of...

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  15. Sign Convention

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  16. Giving reasons, the 'signs' (positive or negative) which can be given ...

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  17. Sign Convention

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  18. One of the following does not apply to a concave mirror. This is :

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  19. If a magnification of, -1 (minus one) is to be obtained by using a con...

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  20. In order to obtain a magnification of, -0.6 (minus 0.6 ) with a concav...

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