Electric circuit is a combination of a conductor and of a source of e.m.f. which permits electrons to flow along a ______.
A: stream
B: wire
C: terminal
D: light
A: stream
B: wire
C: terminal
D: light
举一反三
- An electric current is the flow of ___________. A: sort B: stream C: energy electrons D: electrons
- Power supply, the conductor, the control device and ______ are four basic parts of an electric circuit
- If _____ voltage is applied across _____ circuit, _____ electric current will flow in _____ circuit.
- If _____ voltage is applied across circuit, electric current will flow in circuit. A: a B: an C: the D: 不填冠词
- The plus (+) and minus (-) signs in an electric circuit diagram are used to define . A: . voltage polarity B: . current direction C: . power flow D: . absorbed power