Physics Past Questions and Answers

If a convex lens of focal length 12cm is used to produce a real image four times the size of the object, how far from the lens must the object be placed?

Find the effective resistance in the diagram above

Given the inductor of inductance 5mH, 10mH and 20mH connected in series, the effective inductance is

If electron are accelerated from rest through a potential difference of 10kv, what is the wavelength of the associated electron
[m = 9.1 x 10^-31kg, e = 1.6 x 10^-19C, h = 6.6 x 10^-34js]

N + He → O + X

14	4	17
7	2	8

In the equation above, the particles X is