200+ câu Trắc nghiệm Tiếng Anh chuyên ngành kỹ thuật điện có đáp án - Phần 7

Substations may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial ....

The symbol of potential differenceis

A battery of e.m.f of 12 V supplies a current of 10 A for 6 minutes. How much energy is supplied in this time?

The power from ............. substations is distributed to industrial, commerccial, and residential customers.

In transmission substations, the ........... is stepped up for transmission.

The unit of conductanceis

The unit of the apparent poweris

The ......... substations are constructed in the open air.

Where electricity is generated?

Electronic power conditioning and control of the production and distribution of electricity .... important aspects of the smart grid.

............ convert the energy stored in the fuel (mainly coal, oil, natural gas, enriched uranium) or renewable energies (water, wind, solar) into electric energy.

.......... substations are built in urban areas to decrease the noise from the transformer for reasons of appearance, or to protect switchgear from extreme climate or pollution conditions.

Motor converts electrical energy into ....... energy.

Primary of a ........... is connected in parallelwith the power circuit.

The Hertz is defined as:

The unit of the active poweris

When there is an electric current passing through a wire, the particles moving are ..............

Substations usually consist of following devices:

.......... is the stationary part of a generator.

Resistance of a wire is R ohms. The wire is stretched to double its length, then its resistance in ohms is