GAT Subject Engineering MCQs

Parallel branches share the same voltage.
The equivalent resistance is lower than either branch resistance.

Transformer action requires changing flux to induce voltage.
Steady DC can also cause excessive winding current and heating.

Electrical power is the rate of energy transfer.
For DC circuits, P = VI.

Alternating flux causes hysteresis and eddy-current losses in the core.
Laminations reduce eddy currents.

A kilowatt-hour is energy consumed by one kilowatt for one hour.
It is a unit of energy, not power.

Current flowing through winding resistance produces heat.
Copper loss varies approximately with the square of load current.

A capacitor stores separated electric charge.
Its energy is associated with the electric field between conductors.

Current through an inductor creates a magnetic field.
The stored energy depends on inductance and current.

The farad is the SI unit of capacitance.
Capacitance is charge stored per unit voltage.

The henry is the SI unit of inductance.
Inductance relates induced voltage to rate of current change.

Reactance depends on frequency and energy storage elements.
It contributes to impedance without directly dissipating average power.

Impedance combines resistance and reactance.
It is represented as a complex quantity in AC analysis.