Resistance & Power: Measured by e.m.f in a Circuit

AI Thread Summary
The discussion centers on the measurement of energy dissipated when a cell drives a unit charge around a complete circuit. The options considered include resistance, power, potential difference, and electromotive force (e.m.f). It is clarified that e.m.f represents the energy converted from non-electrical to electrical form per unit charge, while potential difference refers to energy conversion from electrical to other forms. The distinction between these concepts is crucial for understanding circuit behavior. Ultimately, the focus is on accurately defining e.m.f in relation to energy dissipation in circuits.
Xcommunicated
Messages
2
Reaction score
0

Homework Statement



What of the following is measured by the energy dissipated when a cell drives a unit charge round a complete circuit?

A- Resistance
B- Power
C- Potential Difference
D- e.m.f

The Attempt at a Solution



e.m.f is energy converted from non-electrical to electrical form when 1 C of positive charge pass through a cell.

P.d is the energy converted from electical to other forms when 1 C of positive charge passes between 2 points.
 
Physics news on Phys.org
Again what are your thoughts on this?
 
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