A concave mirror of radius of curvature 20cm has a pin pl...
A concave mirror of radius of curvature 20cm has a pin placed at 15cm from its pole. What will be the magnification of the image formed?
4.00
2.00
1.33
1.50
0.25
Correct answer is B
1/U + 1/V = 1/f
f = r/2 = 10cm; 1/15 + 1/v = 1/10
v = 30 = m = v/u = 2
Find the effective resistance in the diagram above ...
Magnetism at the centre of a bar magnet is ...
What factors determine the frequency of a note emitted by a vibrating string? ...
Which of the folowing statements about light travelling from one material medium to another is ...
Which of the following is/are characteristics of sound? I. Pitch II. Loudness III. Quality IV....
Which of the following liquid is a poor conductor of electricity? ...
Which of the following statements correctly defines a simple machine? a device ...