measuring current usually requires opening the circuit to allow a meter to be inserted in series with the circuit, although clip-on current probes are available (but are rather expensive and typically bulky) that can simply be clipped around a wire without needing to modify anything.
DC current
dc
Direct current (DC) is the unidirectional flow of electric charge."Conductivity" is just the ability of a substance to conduct electric current.Copper and silver have a lot of conductivity. Glass has very little of it.
DC-Direct Current.
Instrument used to measure dc current
That's a "direct" current.
to measure electric current.
A DC voltmeter can read an electrostatic field's potential since it can measure a non-changing voltage. However, a electrostatic charge is by definition non-moving. When it does move, it becomes a direct current.
dc
Volts direct current eg battery As opossd to Vac wich is volts altinating current eg mains supply
DC aka direct current
This is known as DC. Direct Current.