How Does Exciting a Hydrogen Atom Affect Its Kinetic and Potential Energy?

AI Thread Summary
Exciting a hydrogen atom from its ground state affects both its kinetic energy (K.E) and potential energy (P.E). The discussion revolves around the relationship between energy levels, where an increase in the principal quantum number (n) leads to changes in K.E and P.E. One participant argues that both K.E and P.E should decrease, while another points out that the book's answer indicates K.E decreases and P.E increases. The confusion arises from the negative sign in the potential energy expression, suggesting that as the magnitude of potential energy decreases, the actual potential energy increases. Ultimately, the correct interpretation hinges on understanding the mathematical relationships governing these energy changes.
sphyics
Messages
102
Reaction score
0
1. When a hydrogen atom is excited from the ground state;
a) K.E & P.E both increases
b)K.E & P.E both decreases
c) K.E increase and P.E decrease
d) K.E decrease & K.E increase.

ATTEMPT

K.E\propto1/n2

P.E\propto1/n2

so n increases both decreases. >>>>option b is right for me.


but the correct answer given in book is option d

wer I'm wrong
 
Physics news on Phys.org
the thing you foud for PE is its mag only
write the expression of PE of electron and proton
here you'll see a - sign
so if mag decrease ... due to - sign ... PE inc
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Thread 'Egg Drop Challenge! Need ideas for winning designs'

I was thinking using 2 purple mattress samples, and taping them together, I do want other ideas though, the main guidelines are; Must have a volume LESS than 1600 cubic centimeters, and CAN'T exceed 25 cm in ANY direction. Must be LESS than 1 kg. NO parachutes. NO glue or Tape can touch the egg. MUST be able to take egg out in less than 1 minute. Grade A large eggs will be used.
View full post »

Similar threads

A rocket on a spring, related to potential/kinetic energy
Replies
3
Views
2K
Why Does Increasing a Satellite's Altitude Affect Its Total Energy?
Replies
1
Views
2K
Temperature & Gas: Correct or Incorrect?
Replies
12
Views
1K
Rate of conversion of P.E. to heat for a waterfall
Replies
12
Views
2K
Potential energy in solids,liquids and gases
Replies
4
Views
3K
Gravitational Potential Energy and Work Energy Theorem
Replies
3
Views
10K
Energy changes of water from a reservoir
Replies
10
Views
7K
Electric Potential Energy of Point Charge Systems
Replies
2
Views
935
The slope of a kinetic energy vs. potential energy graph
Replies
3
Views
21K
Can Conservation of Energy Alone Solve Momentum Problems?
Replies
3
Views
1K

Hot Threads

Recent Insights

Back
Top