An object of height 2.5cm is places 20cm from a convex mi...
An object of height 2.5cm is places 20cm from a convex mirror of focal length 10cm. Calculate the height of its image.
2.5 cm
3.0cm
5.0cm
25.0cm
Correct answer is A
1v=1f−1u
= 110−12=120
v = 20
but hi = v×hou
= 20×2.520
= 2.5cm
A force of 500N1 is applied to a steel wire of cross-sectional area 0.2m2, The tensile stress is...
The period of a wave is 0.02 second. Calculate its wavelength if its speed is 330 ms-1...
An ammeter of resistance 1.0Ω has a full-scale deflection of 50mA. Determine the resultant ...
Which of the following is true of an electrical charge? ...
The period of a 10 kHz radio wave traveling at 108 ms−1 is--...
Uranium-234 disintegrated to form Thorium-230 by emitting ...
Which of the following is NOT an effect that can be produced by an electric current? ...