Question

A platypus foraging for prey can detect an electric field as small as 0.002 N/C To give an idea of the sensitivity of the platypus's electric sense, how far from a +10 nC point charge does the field have this magnitude?

Answer 1

Answer:

2.1213m

Explanation:

$E=\frac{kQ}{r^{2} }$

Electric filed is qual to KQ/r^2

0.002N/C = (9 x 10^9 x 10nC)/ r^2

find r

Answer 2

Answer:

The formula provided is as follow, in  order to determine the electric field magnitude or intensity, E.

As, E= K×Q/r²,

We have to put all the required data in the above equation to get the required results or conclusion: ∴K=8.99×10⁹ N m²/C², while r=0.002 N/C.

So, we have:

E=(8.99×10⁹)×(10×10⁻⁹)/(0.002),

E=44.9 × 10⁻³ N/C.⇒ Answer.

Explanation:

In order to find out the magnitude or the electric field intensity of the field subjected or influenced on the test charge or any body having some net charge, we have to find the total distance or the square of radius "r" and the amount of charge, Q that the charge possess should also be known to us.Along with the constant "K" given to us with a constant value for simplifying the effects of two charges on each other inside a given medium.

• E=K×Q/r².