One of these is not the use of an electroscope
A
testing the type of charge on a charge body
B
measuring ionization current in air
C
detecting the pressure of charge on a charged body
D
producing electric charge in a body
Verified Correct Answer: D.
Physical Principles & Numerical Solution
An electroscope is a passive device used to detect and measure charges, not to produce or generate electric charge in a body.
Source: Myschool Past Questions Archive (Record #70690)