Question

Solve the que plz .as soon as possible
**Brainliest for sure**

Answer 1

Answer:

$E_{A} = 80~N/C$

F = 1.28 × 10⁻¹⁷ N.

Explanation:

Here, we take into account that Electric field strength at a point is directly proportional to number of electric field lines passing through unit area.

Or, E ∝ $\frac{No.~of~field~lines}{Area}$

When you'll take same areas at point A and point B, you'll find that there're twice the number of electric field lines at point A, compared to B, since the separation between field lines at A is half that that at B.

Hence, Electric field strength at A will be twice than that of B.

∴ $E_{A} = 2~*~E_{B}$

⇒$E_{A} = 2~*~40~N/C = 80~N/C$

Now, force on a charged particle in an electric field is given as

F = q · E

So, force on a proton at point A will be

F = 1.6 × 10⁻¹⁹ × 80 N

F = 1.28 × 10⁻¹⁷ N.

Answer 2

Answer:

hey what's up krais, cool name

Explanation:

Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe and about a quarter of its total mass–energy density or about 2.241×10−27 kg/m3. ... Most dark matter is thought to be non-baryonic in nature; it may be composed of some as-yet undiscovered subatomic particles.