A real and enlarged image can be obtained by using

 

  •  A real and enlarged image can be obtained by using 
    1. Convex mirror
    2. Plane mirror
    3. Concave mirror
    4. Convex and plane mirror                                            
    
Ans.    Please see above  to understand clearly that when object AB is between focal point and centre  
           of curvature, the image A'B' is real and enlarged.
           So, it is clear that correct option is 3. Concave mirror

Comments

Post a Comment

Popular posts from this blog

In a vernier calipers, there are 10 divisions on the vernier scale and 1 cm on the main scale is divided in 10 parts. While measuring a length, the zero of the vernier lies just ahead of 1.8 cm mark and 4th division of vernier coincides with a main scale division. The value of length is

   In a vernier calipers, there are 10 divisions on the vernier scale and 1 cm on the main scale is divided in 10 parts. While measuring a length, the zero of the vernier lies just ahead of 1.8 cm mark and 4th division of vernier coincides with a main scale division. The value of length is  1.804 cm 1.840 cm 1.800 cm None of these              Ans.     As we know that the measurement taken by a vernier calipers                         = reading on main scale just before zero mark of vernier scale                              + (number of divisions of vernier scale coinciding with any main scale division                                 x least count of the vernier calipers) ...
Read more

In an instrument, there are 25 divisions on the vernier scale which coincide with 24th division of the main scale. 1 cm on main scale is divided in 20 equal parts. The least count of the instrument is

   In an instrument, there are 25 divisions on the vernier scale which coincide with 24th division of the main scale. 1 cm on main scale is divided in 20 equal parts. The least count of the instrument is  0.002 cm 0.05 cm 0.001 cm 0.02 cm      Ans. As we know that the least count of a vernier calipers is              = the value of smallest division of main scale / number of divisions of vernier scale                 = (1 cm / 20) / 25               = (10 mm / 20) / 25               = 0.5 mm / 25               = 0.02 mm               = 0.002 cm             Therefore, option  1 that is  0.002 cm  is correct.
Read more

A body rises vertically up to a height of 125 m and comes back at the point of projection in 5 s. The average speed of the body was

   A body rises vertically up to a height of 125 m and comes back at the point of projection in 5 s. The average speed of the body was  25 m/s, 50 m/s, Zero None of these          Ans.     As we know that speed = distance traveled / time taken,                         Here, as the speed is changing  continuously,                         Average speed = total distance traveled / total time taken                                                       =  (125 m + 125 m) / 5 s,                                       ...
Read more