Trắc nghiệm Công nghệ 12 Điện – điện tử Cánh diều bài 1: Khái quát về kĩ thuật điện

A A. Conductance B B. Capacitance C C. Resistance D D. Inductance

A A. AC circuits use transistors, while DC circuits use vacuum tubes. B B. AC current changes direction periodically, while DC current flows in one direction. C C. AC circuits are always high voltage, while DC circuits are always low voltage. D D. AC circuits are used for batteries, while DC circuits are used for power grids.

A A. Ampere (A) B B. Volt (V) C C. Ohm (Ω) D D. Hertz (Hz)

A A. To generate heat. B B. To conduct electricity with very high resistance. C C. To control the flow of electricity and amplify signals. D D. To store mechanical energy.

A A. The amplitude of the voltage wave. B B. The number of cycles of the alternating current per second. C C. The phase difference between voltage and current. D D. The total power consumed by the circuit.

A A. Resistance B B. Current C C. Power D D. Voltage

A A. Electromagnetics B B. Electrostatics C C. Electronics D D. Power Systems

A A. Ohm (Ω) B B. Volt (V) C C. Ampere (A) D D. Watt (W)

A A. To convert DC voltage to AC voltage. B B. To change the frequency of an AC signal. C C. To step up or step down AC voltage levels. D D. To store large amounts of electrical energy.

A A. Alternating Current (AC) B B. Direct Current (DC) C C. Pulsating Direct Current D D. Variable Current

A A. The opposition to current flow. B B. The reciprocal of resistance, indicating ease of current flow. C C. The storage of energy in an electric field. D D. The rate at which energy is transferred.

A A. Joule (J) B B. Watt (W) C C. Volt-Ampere (VA) D D. Ohm (Ω)

A A. Newtons laws of motion. B B. Ohms Law, relating voltage, current, and resistance. C C. The principles of aerodynamics. D D. The theory of relativity.

A A. Generator B B. Motor C C. Transformer D D. Battery

A A. Kirchhoffs Voltage Law B B. Amperes Law C C. Ohms Law D D. Faradays Law of Induction

A A. To store electrical energy in a magnetic field. B B. To convert mechanical energy into electrical energy. C C. To regulate voltage in a circuit. D D. To transform AC to DC.

A A. To store electrical energy. B B. To amplify the electrical signal. C C. To limit or control the flow of current. D D. To convert electrical energy into light.

A A. Capacitor B B. Inductor C C. Battery D D. Resistor

A A. The total voltage is the sum of voltages across each branch. B B. The total voltage is less than the voltage across the smallest branch. C C. The voltage across each branch is the same as the total voltage. D D. The total voltage is the reciprocal of the voltage across each branch.

A A. Inductor B B. Capacitor C C. Resistor D D. Diode

A A. To design and maintain systems that generate, transmit, and utilize electrical energy. B B. To develop software applications for personal computers. C C. To conduct research in biological sciences and medicine. D D. To manage financial markets and economic policies.

A A. Designing bridges and buildings. B B. Developing telecommunication networks and signal processing. C C. Creating agricultural machinery. D D. Studying geological formations.

A A. The total resistance is less than any individual resistance. B B. The total resistance is equal to the smallest individual resistance. C C. The total resistance is the sum of all individual resistances. D D. The total resistance is the reciprocal of the sum of individual resistances.

A A. The rate of flow of electric charge. B B. The opposition to the flow of electric current. C C. The electric potential difference between two points. D D. The amount of electrical power consumed.

A A. They exclusively use mechanical switches. B B. They often involve complex arrangements of semiconductor devices. C C. They are designed to be as large and heavy as possible. D D. They operate using only direct current.