**Answer:**

**Explanation:**

If the acceleration due to gravity on the Moon's surface is and the acceleration due to gravity on the Earth is , we can write that:

If the radius of the Moon is and the radius of the Earth is , we can write that:

By **Newton's 2nd Law** we know that F=ma and using **Newton's law of universal gravitation** we can calculate the gravitational force an object with mass <em>m</em> experiments from a planet with mass <em>M</em> being at a distance <em>r</em> from it. We will assume our object is on the surface so this distance will be the radius of the planet.

Since the force the object experiments is the force of gravitation we can write, for Earth:

which means:

And for the Moon:

which means:

We can then write the fraction:

Which means:

X-rays are used by dentist to locate cavities in teeth

**Answer:**

(a) 6.283 Wb (b) 69.11 Wb (c) I = 0.628 A

**Explanation:**

Given that,

The diameter of the loop, d = 40 cm

Radius, r = 20 cm

Initial magnetic field, B = 5 mT

Final magnetic field, B' = 55 mT

Initial magnetic flux,

Final magnetic flux,

Due to change in magnetic field an emf will be generated in the loop. It is given by :

Let I be the current in the loop. We can find it using Ohm's law such that,

**Hence, this is the required solution.**

The formula is ''w=fd''

So according this fromula we excersise:

W= (1000N) (150)

So we multiply ''1000'' times ''150''

W= 150,000J

Hope i helped! If you need anything else ask me! :)

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