What must be the distance between an object and a converg...
What must be the distance between an object and a converging lens of focal length 20cm to produce an erect image two times the object height?
20cm
15cm
10cm
5cm
Correct answer is C
F = \(\frac{uv}{u + v}\); v = 2u
20 = \(\frac{ux - 2u}{u + (-2u)}\); u = 10cm
The magnitude of the angle of dip at the equator is ...
A transverse wave can be distinguished from a longitudinal wave by ...
Rectifiers are used to convert ...
Which of the following is not a mechanical wave? ...
Heat transfer by convection in a liquid is due to the ...
The thermometric properties of a thermocouple is the change in? ...
The quantity of heat needed to raise the temperature of a body by 1K is the body's ...