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
Which of the units of the following physical quantities are derived? I. Area II. Thrust III. Pres...
On an a.c generator, which of the following does not apply? ...
The Earth's magnetic equator passes through Jos in Nigeria. At Jos. the ...
Which of the following statement about viscosity is not true? it ...
What is the acceleration due to gravity 'g' on the moon, if g is 10-2 on the earth?...
Which of the following components is used for storing electric charges? ...