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Q.

State whether the following statements are true or false


A dynamo is an electrical generator that creates direct current using a commutator.The main difference between AC and DC lies in the direction in which the electrons flow. In DC, the electrons flow steadily in a single direction while electrons keep switching directions, going forward and then backwards in AC.


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a

True

b

False 

answer is A.

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Detailed Solution

The given statement is true.
Concept- The Direct Current Dynamo is comparable to an Alternating Current generator, but unlike an ACG, it has a method to counteract the effects of changing current direction. To counteract the impact of shifting current direction, we build an alternating current generator and add the system.
Question ImageThe magnetic flux inside the coil varies as it rotates, causing an electric current to flow through it, reach the commutator, and then pass onto the wires to carry the current to electronic devices using brushes. The commutators are connected to the coil, and when the side of the coil that was on the left initially moves to the right, the flow through the coil reverses, but thanks to the arrangement of the commutator and brush, the current flow through the wires stays the same, giving us direct current in the wire. The coil needs external energy to revolve, which must be supplied.
Alternating current (AC) and direct current are the two ways that electric current can flow (DC). The direction of the current in alternating current alternates between moving forward and moving backward. When in direct current, it consistently flows in a single direction.
Hence, the given statement is true.
 
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State whether the following statements are true or falseA dynamo is an electrical generator that creates direct current using a commutator.The main difference between AC and DC lies in the direction in which the electrons flow. In DC, the electrons flow steadily in a single direction while electrons keep switching directions, going forward and then backwards in AC.