A GENERATOR MANUFACTURING COMPANY WAS CONTRACTED TO PRODUCE AN A.C DYNAMO BUT INADVERTENTLY PRODUCED A D.C DYNAMO. TO CORRECT THIS ERROR, THE

• A. armature coil should be made of silver
• B. commutator should be replaced with slip ring ✓
• C. commutator should be replaced with split rings
• D. armature coil should be made of aluminium

The scenario presented involves a generator manufacturing company that was supposed to produce an AC dynamo but mistakenly produced a DC dynamo. To correct this error, we need to understand the fundamental differences between AC and DC dynamos and identify the specific components that need to be modified in order to convert the mistakenly produced DC dynamo into an AC dynamo.

Difference Between AC and DC Dynamos:

1. AC Dynamo: An AC dynamo generates alternating current, where the direction of current flow changes periodically. In an AC dynamo, the commutator is replaced by slip rings, which allow for continuous contact with the external circuit without changing the direction of current flow.
2. DC Dynamo: A DC dynamo generates direct current, where the current flows in one direction only. In a DC dynamo, the commutator is used to convert the alternating current induced in the armature coils into direct current that flows in one direction through the external circuit.

Correcting the Error:

Given that a DC dynamo was inadvertently produced instead of an AC dynamo, we need to modify certain components to convert it into an AC dynamo:

Answer: B. Commutator should be replaced with slip ring

Replacing the commutator with slip rings will allow for continuous contact with the external circuit without changing the direction of current flow, thus converting the DC dynamo into an AC dynamo.

Therefore, to correct the error made by producing a DC dynamo instead of an AC dynamo, the commutator should be replaced with slip rings.

In other words, the commutator is a crucial component in a DC dynamo that helps in converting alternating current (AC) to direct current (DC). By replacing the commutator with slip rings, which are commonly used in AC dynamos, the generator can effectively produce alternating current.

This correction is necessary because slip rings are designed to maintain electrical contact with a rotating assembly, allowing for the transfer of power and signals. In contrast, a commutator is specifically used in DC dynamos to switch the direction of current flow.