Home
Class 12
PHYSICS
(A) atom as a whole is electrically neut...

(A) atom as a whole is electrically neutral.
(R)atom contains equal amount of positive and negative charges.

A

if both assertion and reason are true and reason is the correct explanation of assertion.

B

if both assertion and reason are true but reason is not the correct explanation of assertion.

C

if assertion is true but reason is false.

D

if both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
For an atom, number of electrons is equal to number of protons and neutrons are electrically neutral , so net charge on an atom is nill.
Promotional Banner

Topper's Solved these Questions

  • ATOMS

    NCERT FINGERTIPS|Exercise NCERT Exemplar|7 Videos

  • ALTERNATING CURRENT

    NCERT FINGERTIPS|Exercise Assertion And Reason|15 Videos

  • COMMUNITCATION SYSTEMS

    NCERT FINGERTIPS|Exercise HOTS|10 Videos

Similar Questions

Explore conceptually related problems

A coin is made up of Al and weighs 0.75 g. It has a square shape and its diagonal measures 17 mm. It is electrically neutral and contains equal amounts of positive and negative charges. The magnitude of these charges is (Atomic mass of Al = 26.98 g)

A paisa coin is made up Al.Mg alloy and weighs 0.75 g. It has a square shape and its diognal measures 17mm. It is electrically neutral and constants equal amounts of positive and negative charges . Treating the paisa coin made up of only Al, find the magnitude of equal number of positive and negative charges. What concluision do you draw from this magnitude ?

Consider a coin, It is electrically neutral and contains equal amounts of positive and negative charge of magnitude 34.8 kC. Suppose that these equal charges were concentrated in two point charges separated by (i) 1cm (~(1)/(2)xx diagonal of the one paisa coin ) (ii) 100 m (~length of a long building) (iii) 10^(6)m (radius of the earth). find the force on each such point charge in each of the three cases. what do you conclude from these results?

Consider a coin of exercise 1.20. It is electrically neutral and contains equal amounts positive and negative charge of magnitude 34.8 kC. Suppose that these equal charges were concentrated in two point charges separated by (i) 1 cm (~half the diagonal of one paisa coin) (ii) 100 m (~length of a long building), and (iii) 10^6 m (radius of the earth). Find the force on each such point charge in each of the three cases. What do you conclude from these results?