Electric Energy: False Claims Debunked

AI Thread Summary
Electric energy in a system can change due to various factors, not solely through conversion to thermal energy. For instance, when a battery powers an electric motor, energy is transformed into both thermal energy and mechanical work, demonstrating that multiple forms of energy conversion can occur simultaneously. The assertion that electric energy only varies when converted to thermal energy is therefore false. Other factors influencing electric energy include the efficiency of energy conversion and the presence of resistive elements in the circuit. Understanding these dynamics is crucial for accurately assessing electric energy in different systems.
lorramcet
Messages
1
Reaction score
0
When electric charges occur in a system, it is possible to determine the electric energy of the system. Which of the following is false:

d. The electric energy of the system can only vary when it is converted into thermal energy

Why is this answer False?
What other factors affect electric energy?

Thank You
Lorramcet
 
Physics news on Phys.org
lorramcet said:
When electric charges occur in a system, it is possible to determine the electric energy of the system. Which of the following is false:

d. The electric energy of the system can only vary when it is converted into thermal energy

Why is this answer False?
What other factors affect electric energy?

Thank You
Lorramcet

You connect a battery to an electrical motor. some of the energy goes into thermal energy but some goes into work that makes the motor rotates. That is just one possible example
 
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top