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Andru [333]
3 years ago
7

9. Which of the following methods can be used to cut down on brush sparking in a DC generator?

Physics
1 answer:
rusak2 [61]3 years ago
5 0

Answer:

<em>Installing interpoles in armature core helps to cut down the spark in DC generators. </em>

Explanation:

A dc generator has a split ring type commutator to convert ac current generated to dc. The commutator comes in contact with the brushes throughout the working of the generator. Sparks occur in this region of contact.

When current flows through the armature coil it produces armature flux which opposes the main flux. This is called armature reaction and is the reason for sparks.

Interpol's are small auxiliary poles placed between the main poles of the generator. They are wound by wires of a number of turns connected in series with the armature. Interpol's produce a field that cancels the magnetising field of the armature and thus cancels armature reaction.

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A strong man and a weak man are trying to carry a ladder . How should they carry it in such a way that the weak person feels les
dsp73

Answer:

The strong person should carry the ladder at the  front end and the weak person should carry it at the back end.

Explanation:

this is because in such a case the strong person has to pull the ladder whereas the weak person at the back end have to push the ladder. In such case it is easier to push because the weak person can use the force of gravity of his own body for pushing the ladde.

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Pre-Test Active
vlada-n [284]

n is the answer I guess

not so sure

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2 years ago
The density of silver is 10.49 g/cm3. If a sample of pure silver has a volume of 12.993 cm3, what is the mass?
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Explanation:

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