Question

Assertion (A): In an ideal step-down transformer, the electrical energy is not lost.

Reason (R): In a step-down transformer, voltage decreases but the current increases.

विकल्प

• If both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

• If both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A).

• If Assertion (A) is true but Reason (R) is false.

• If both Assertion (A) and Reason (R) are false.

Answer 1

If both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

Explnation:

In an ideal step-down transformer, energy loss is nonexistent, assuming 100% efficiency (absence of resistance, flux leakage, or eddy currents). In an ideal scenario, input power equals output power; in a step-down transformer, voltage diminishes as current amplifies to maintain constant power (P = VI).