The heights of the mercury thread in a mercury-in-glass thermometer when in melting ice and then in steam are 3cm and 18cm respectively. At a temperature of 60oC the height would be
Which of the following statements is incorrect? The sensitivity of a galvanometer which incorporates an optical lever arrangement may be increased by providing
A.
a larger number of turns in the coil
B.
a thinner suspension with a small torsional control
C.
a special alloy permanent magnet which gives a high magnetic flux
