A converging lens of focal length 5cm forms a virtual ima...
A converging lens of focal length 5cm forms a virtual image which is 10cm from the lens. How far from the lens is the object?
2.0cm
3.3cm
5.0cm
10.0cm
15.0cm
Correct answer is B
f=uvu+v
5=−10u−10+u
50+5u=−10u
50=−10u−5u
u=50−15
u= -3.3cm
The net capacitance in the circuit above is ...
Primary colours of light are ...
A battery of e.m.f 3.0V is connected across a potentiometer wire AB of length 10Ωm−1 as...
An electric motor primary converts ...
The magnetic force on a charged particle moving with velocity v is...
The pair of physical quantities that are scalar only are ? ...