A simple apparatus used to detect charge on a body is the gold leaf:

Question

Accepted Answer

C. Electroscope

1. Charge itself is invisible and must be shown indirectly.
2. One classic instrument makes it visible.
3. A simple apparatus to detect charge on a body is the gold-leaf electroscope.
4. So the answer is an electroscope.
_Source: syllabus Physics, Ch 1 'Electric Charges and Fields'_

Answer

Electrolyte

Answer

Electrometer

Answer

Electromagnet

A simple apparatus used to detect charge on a body is the gold leaf:

Keep practising Electric Charges and Fields