Comparative Language in Engineering

Identify the difference in voltage levels between AC and DC.

• AC voltage levels are always higher than DC levels.

• AC voltage levels fluctuate over time; DC voltage levels are constant.

• DC voltage levels fluctuate over time; AC levels are constant.

• AC voltage is used exclusively in batteries while DC is used in power lines.

AC voltage is typically higher than DC voltage, but DC is more stable.

• AC voltage is typically higher than DC voltage, but DC is more stable.

• AC voltage is always lower than DC voltage.

• DC voltage is more efficient than AC voltage.

• AC voltage is more stable than DC voltage.

While AC is used for long-distance transmission, DC is preferred for short distances.

• AC is used for long-distance transmission, while DC is preferred for short distances.

• AC is only used for local transmission, while DC is used for long distances.

• AC is preferred for short distances, while DC is used for long-distance transmission.

• DC is used for both long-distance and short-distance transmission.

The efficiency of AC motors is greater than that of DC motors.

• DC motors are more efficient than AC motors.

• True

• AC motors and DC motors have the same efficiency.

• AC motors are less efficient than DC motors.

In contrast to AC, DC circuits do not change direction.

• DC circuits can change direction.

• AC circuits do not change direction.

• DC circuits alternate current.

• DC circuits do not change direction.

Comparative analysis shows that AC can transmit power over longer distances than DC.

• AC can transmit power over longer distances than DC.

• AC cannot be used for high-voltage transmission.

• DC is better for transmitting power over long distances than AC.

• DC is more efficient for long-distance transmission than AC.

Unlike AC, which can be transformed easily, DC requires more complex systems.

• DC requires more complex systems than AC.

• DC is easier to transform than AC.

• DC can be transformed easily like AC.

• AC requires more complex systems than DC.

AC systems are generally more complex than DC systems, yet they are more versatile.

• DC systems are generally more complex than AC systems.

• AC systems are more versatile than DC systems.

• AC systems are simpler than DC systems.

• DC systems are more versatile than AC systems.

Whereas AC is used in household appliances, DC is often used in batteries.

• AC is used in household appliances, while DC is used in batteries.

• AC is primarily used in electric vehicles, while DC is used in home lighting.

• AC is used in batteries, while DC is used in household appliances.

• AC is used for charging devices, while DC is used in power plants.

The frequency of AC is variable, whereas DC has a constant frequency.

• AC has a constant frequency, while DC is variable.

• Both AC and DC have variable frequencies.

• DC can have a changing frequency depending on the circuit.

• True