The silvered surface in a vacuum flask reduces heat loos ...
The silvered surface in a vacuum flask reduces heat loos due to
conduction
convection
radiation
evaporation
Correct answer is C
No explanation has been provided for this answer.
For a concave mirror to form a teal diminished image, the object must be placed ...
Which of the following statements about the human eye and the camera is correct? ...
A capacitor of capacitance 25μF is connected to an a.c. power source of frequency 200 Hz. Calcula...
The image obtained on the screen of a pin-hole camera becomes less sharply defined when the ...