举一反三
- If _____ voltage is applied across _____ circuit, _____ electric current will flow in _____ circuit.
- 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. A: a B: an C: the D: 不填冠词
- The inductance of an electric device is independent of the electric current it carries. A: 正确 B: 错误
- ____ ()<br/>electric current ()nto A: circuit as B: result either of C: (fault)<br/>in the
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electric current
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What creates a magnetic field? More than one answer may be correct. ( ) A: a stationary object with electric charge B: a charged capacitor disconnected from a battery and at rest C: a stationary conductor carrying electric current D: a difference in electric potential
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Electric power is an indispensable energy on board, so _____ plays a role in distribution, conversion and control of electric power on board. A: power supply unit B: distribution device C: power network D: load
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The Biot-Savart Law is used to（ ） A: determine the magnetic field created by an electric current B: determine the electric field created by an electric current C: determine the force field created by an electric current D: determine the magnetic field created by individual point charges E: determine the electric field created by individual point charges
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1. What creates a magnetic field? More than one answer may be correct. A: a stationary object with electric charge B: a stationary conductor carrying electric current C: a difference in electric potential D: a charged capacitor disconnected from a battery and at rest