unit 1 BEE Elementary Concepts and DC Circuits

The unit of electrical resistance is:

• Ampere

• Volt

• Ohm

• Coulomb

What is the function of EMF in a circuit?

• To increase resistance

• To provide energy to move charges

• To decrease voltage

• To stop current flow

Current is defined as:

• Flow of neutrons

• Flow of electrons

• Opposition to charge flow

• Energy dissipation

The potential difference between two points is measured in:

• Ohms

• Amperes

• Volts

• Joules

Ohm’s law states that:

• Voltage is proportional to current

• Voltage is proportional to resistance

• Resistance is proportional to current

• Power is proportional to resistance

Electrical power is typically generated at:

• Low voltage

• Medium voltage

• High voltage

• Extra-high voltage

In a power system, the step-up transformer is used to:

• Increase power

• Increase voltage

• Decrease in current

• Both increase voltage and decrease current

The primary function of transmission lines is to:

• Generate electricity

• Distribute electricity to consumers

• Transfer bulk power over long distances

• Store electrical energy

The final stage in the electrical power system before it reaches consumers is:

• Generation

• Transmission

• Distribution

• Substation

Which type of current is commonly used in power transmission?

• Direct Current (DC)

• Alternating Current (AC)

• Both DC and AC equally

• Pulsating DC