<P> Electroscopes detect electric charge by the motion of a test object due to the Coulomb electrostatic force . Since the electric potential or voltage of an object with respect to ground equals its charge divided by its capacitance to ground , an electroscope can be regarded as a crude voltmeter . However , the accumulation of enough charge to detect with an electroscope requires hundreds or thousands of volts , so electroscopes are only used with high - voltage sources such as static electricity and electrostatic machines . Electroscopes generally give only a rough , qualitative indication of the magnitude of the charge . An instrument that measures charge quantitatively is called an electrometer . </P>
<P> Electroscopes detect electric charge by the motion of a test object due to the Coulomb electrostatic force . Since the electric potential or voltage of an object with respect to ground equals its charge divided by its capacitance to ground , an electroscope can be regarded as a crude voltmeter . However , the accumulation of enough charge to detect with an electroscope requires hundreds or thousands of volts , so electroscopes are only used with high - voltage sources such as static electricity and electrostatic machines . Electroscopes generally give only a rough , qualitative indication of the magnitude of the charge . An instrument that measures charge quantitatively is called an electrometer . </P>
which property is used ti identify the electric charge on the object
which property is used ti identify the electric charge on the object
Coulomb electrostatic force
Coulomb electrostatic force