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单选题 If the length of a wire is halved and the cross-sectional(横截面积) area is doubled, the resistance will be ______
学科：船舶电子电气专业英语2
时间：2025-12-01 15:04:55
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题目1单选题
Voltage will always lead current in a/an ______A. magnetic circuitB. resistance circuitC. capacitive circuitD. inductive circuit
题目2单选题
With a ____load the voltage and current are in phaseA. purely resistanceB. capacitiveC. MixedD. inductive
题目3单选题
The following picture indicates a ___ circuit.<img src="https://tihai-oss-cloud.itihey.com/img/4aa96a633fdb9391c1c7cb26c236c3a3.jpeg">A. parallelB. seriesC. series-parallel combinationD. simple
题目4单选题
If the length of a wire is halved and the cross-sectional(横截面积) area is doubled, the resistance will be ______A. quarteredB. quadrupledC. doubledD. unchanged
题目5单选题
The ____ is the international unit for frequency measurementA. hertzB. voltC. ampereD. Watt
题目6单选题
Which of the following statements is true concerning simple parallel resistance circuitsA. The total voltage equals the sum of the individual voltages across each resistanceB. The total current flow equals the reciprocal of the sum of the individual currentsC. The total resistance equals the sum of the individual resistanceD. The total current flow equals the sum of the individual currents
题目7单选题
Electric cables on board should have features of the following except ______A. flame retardantB. moisture resistantC. low conductivityD. oil resistant
题目8单选题
The current flowing first in one direction and then in another is called______ currentA. a rushB. an excitingC. a directD. an alternating
题目9单选题
The unit of the electrical energy is ________A. coulomb (C)B. volts (V)C. joule (J)D. ampere (A)
题目10单选题
The resistance of a conductor varies ______A. inappropriately as its length and inversely as its cross- sectional areaB. appropriately as its length and directly as its cross-sectional areaC. inappropriately as its length and directly as its cross- sectional areaD. appropriately as its length and inversely as its cross-sectional area
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