Question

an electric motor winds 200turnsof a thin copper wire on a uniform rod of diameter 10cm in 2seconds.then the length of wire that is wound overall the rod in 1seconds is​

Answer 1

Answer:

Given:

200 Turns in 10 cm diameter in 2 Sec.

Step-by-step explanation:

Step 1

First we will find the periphery (Circumference) of the rod.

As the rod is circular given the diameter as 10 cm.

Using the formula of Circumference $\pi . d$

Where d is the diameter.

So our Circumference is length of wire in one turn.

And that is (3.14 * 10) = 31.4 cm

Step 2

Now we will find the number of turns in 1 sec.

Since, It was given that number of turns in 2 sec is 200.

So, The number of turns in 1 sec would be 200/2= 100 turns.

Step 3

Now we will multiply number of turns with length of wire to find out the exact length wound in 1 sec.

Exact length in 1 sec = Circumference of rod * Number of turns in 1 sec.

                 =  31.4*100 = 3140 Cm.

We can convert it in meter. 3140/1000= 31.4 m