JAMB - Physics (1979 - No. 15)
Which of the following statements is incorrect? The sensitivity of a galvanometer which incorporates an optical lever arrangement may be increased by providing
a larger number of turns in the coil
a thinner suspension with a small torsional control
a special alloy permanent magnet which gives a high magnetic flux
all of the above
a light source with a greater intensity
ব্যাখ্যা
A light source with a greater intensity. While it can improve visibility, it does not affect the sensitivity of the galvanometer