Fundamental Forces In Nature

Question 1

four fundamental forces

Answer 1

gravitational
electromagnetic
weak nuclear
strong nuclear

Question 2

which force plays a main role in formation and evolution of stars, galaxies and galactic clusters

Answer 2

gravitational force

Question 3

electrical repulsion between two protons at a given distance is ____ times stronger than their gravitational attractive force

Answer 3

10^36

Question 4

one similarity and one difference between gravitational and electromagnetic forces

Answer 4

similarity: don’t require a medium
difference: magnitude of electromagnetic force changes when medium is changed

Question 5

which force binds nucleons

Answer 5

strong nuclear force

Question 6

does electron experience strong nuclear force

Answer 6

no

Question 7

does strong nuclear force depend upon charge

Answer 7

no

Question 8

which force appears in B-decay of nucleus

Answer 8

weak nuclear force

Question 9

what happens in B-decay process

Answer 9

nucleus emits an electron and an uncharged particle called neutrino

Question 10

four forces strongest to weakest

Answer 10

strong nuclear
electromagnetic
weak nuclear
gravitational

Question 11

relative strength of strong nuclear force

Answer 11

1

Question 12

relative strength of electromagnetic force

Answer 12

10^-2

Question 13

relative strength of weak nuclear force

Answer 13

10^-13

Question 14

relative strength of gravitational force

Answer 14

10^-39

Question 15

four forces from shortest range to biggest

Answer 15

weak nuclear force
strong nuclear force
gravitational and electromagnetic

Question 16

range of weak nuclear force

Answer 16

very short approx. 10^-16 m

Question 17

range of strong nuclear force

Answer 17

short approx. 10^-15 m

Question 18

range of electromagnetic force

Answer 18

infinite

Question 19

range of gravitational force

Answer 19

infinite

Question 20

strong nuclear force operates among

Answer 20

nucleons, heavier elementary particles

Question 21

electromagnetic force operates among

Answer 21

charged particles

Question 22

weak nuclear force operates among

Answer 22

some elementary particles, particularly electron and neutrino

Question 23

gravitational force operates among

Answer 23

all objects in the universe

Question 24

why isn’t gravitational force repulsive like electromagnetic force

Answer 24

because mass comes in only one variety whereas charge comes in two varieties - positive and negative

Question 25

central forces

Answer 25

gravitational and electromagnetic

Question 26

how did Newton unify terrestrial and celestial domains

Answer 26

with his universal law of gravitation

Question 27

electric and magnetic phenomena were shown as inseparable with the experiments of

Answer 27

Oersted and Faraday

Question 28

maxwell’s discovery that light is an electromagnetic wave unified

Answer 28

electromagnetism and optics

Question 29

einstein’s last years were spent in an unsuccesful search for a theory that would bring which two forces together

Answer 29

gravitation and electromagnetism

Question 30

electromagnetic force and weak nuclear force were shown as different aspect of which force and when

Answer 30

electroweak force in 1979

Question 31

what is satyendra nath bose known for

Answer 31

bose-einstein condensate
bose-einstein statistics
bose gas
boson