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Which of the following is (are) correct?...

Which of the following is (are) correct? .

A

The image and objects are never on opposite side of focus in spherical mirror

B

A virtual image must be erect

C

An image formed in a plane mirror must have same speed as the object has

D

Laws of reflection are same for all wave lengths.

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The correct Answer is:
A, D
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RESONANCE ENGLISH-DAILY PRACTICE PROBLEM-DPP No.13
  1. Two balls are projected from points A and B in vertical plane as shown...

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  2. A particle moves in the the x-y plane according to the scheme x= 8 sin...

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  3. A stone is dropped from a certain height which can reach the ground in...

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  4. A particle is projected at an angle of elevation alpha and after t sec...

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  5. Three co-planar vectors (x-y plane ) having magnitude 3sqrt(2),6,10 ar...

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  6. A particle is moving with velocity (hat(i) + 2hat(j) + 3hat(k))m//s. A...

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  7. A particle P is moving with a constant speed of 6 m//s in a direction ...

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  8. A body travelling with uniform acceleration crosses two points A and B...

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  9. A ball is dropped from a height of 20 m and rebounds with a velocity w...

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  10. A swimmer crosses the river along the line making an angle of 45^@ wit...

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  11. A man is holding an umbrella at angle 30^(@) with vertical with lower ...

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  12. Man A sitting in a car moving with 54km//hr observes man B in front of...

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  13. A man in a balloon throws a stone downwards with a speed of 5 m//s wi...

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  14. A particle is projected from a point P (2,0,0)m with a velocity 10(m)/...

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  15. A particle A is projected with speed V(A) from a point making an angle...

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  16. A projectile is fired with a velocity v at right angle to the slope in...

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  17. A stone projected at angle theta with horizontal from the roof of a ta...

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  18. A particle approaches from very large distance towards concave mirror ...

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  19. A glass beaker has diameter 4cm wide at the bottom. An observer observ...

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  20. Which of the following is (are) correct? .

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