At which position should an object be placed in front of ...
At which position should an object be placed in front of a concave mirror in order to obtain an image which is of the same size as the object?
at the centre of curvature
at the principal focus
between the pole and principal focus
between the centre of curvature and principal focus
Correct answer is A
No explanation has been provided for this answer.
If the capacitance of a capacitor is C = (εA)/d, which of the following parameters is varied...
A man will exact the greatest pressure on a bench when he ...
Which of the following statements supports the assumption that light travels in straight lines? ...
I. Small size. II. Low power requirement III. Not easily damaged by high temperature IV. Highly d...
A 40W instrument has a resistance 90 Ohms. On what voltage should it be operated normally ...