3 years ago

Separating paper from a mixture by burning it is it a physical change true or false

Physics

1 answer:

Oduvanchick [21]3 years ago

7 0

Answer:

false

Explanation:

burning something is a chemical change

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A transformer with 1000 turns on the primary coil is used to decrease the voltage from 2500 V to 120 V for home use. How many tu

Katyanochek1 [597]

Answer:

The number of turns in the secondary coil is 48.

(B) is correct option.

Explanation:

Given that,

Number of turns on primary coil= 1000

Primary voltage = 2500 V

Secondary voltage = 120 v

We need to calculate the turns in the secondary coil

Using relation between voltage and number of turns in primary and secondary coil

$\dfrac{V_{s}}{V_{p}}=\dfrac{N_{s}}{N_{p}}$

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$N_{s}=\dfrac{120}{2500}\times1000$

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4 years ago

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