NEET 2019 | Electrostatics Question 18 | Physics

NEET 2019

MCQ (Single Correct Answer)

-1

A hollow metal sphere of radius R is uniformly charged. The electric field due to the sphere at a distance r from the centre :

zero as r increases for r < R, decreases as r increases for r > R

zero as r increases for r < R, increases as r increases for r > R.

decreases as r increases for r < R and for r > R.

increases as r increases for r < R and for r > R.

NEET 2019

MCQ (Single Correct Answer)

-1

Two point charges A and B, having charges +Q and – Q respectively, are placed at certain distance apart and force acting between them is F. If 25% charge of A is transferred to B, then force between the charges becomes :

$${{16F} \over 9}$$

$${{9F} \over {16}}$$

$${{4F} \over 3}$$

NEET 2019

MCQ (Single Correct Answer)

-1

Two parallel infinite line charges with linear charge densities +$$\lambda $$ C/m and -$$\lambda $$ C/m are placed at a distance of 2R in free space. What is the electric field mid-way between the two line charges?

$${{2\lambda } \over {\pi {\varepsilon _0}R}}$$ N/C

zero

$${\lambda \over {\pi {\varepsilon _0}R}}$$ N/C

$${\lambda \over {2\pi {\varepsilon _0}R}}$$ N/C

NEET 2018

MCQ (Single Correct Answer)

-1

An electron falls from rest through a vertical distance h in a uniform and vertically upward directed electric field E. The direction of electric field is now reversed, keeping its magnitude the same. A proton is allowed to fall from rest in it through the same vertical distance h. The time of fall of the electron, in comparison to the time of fall of the proton is

smaller

5 times greater

10 times greater

equal

PREVIOUS NEXT

NEET Subjects

Biology

Botany

Zoology

Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution