How Does Battery Size Affect Charge Transfer in a Flashlight?

AI Thread Summary
The discussion centers on how battery size impacts charge transfer in flashlights, specifically comparing AAA and C cells. A 1.5-volt AAA cell provides 750 milliamperes for 5 minutes, while a C cell delivers the same current for 20 minutes. The total charge transferred by the AAA cell is calculated using the formula W = VIt, leading to confusion about the correct answer regarding the comparative charge transfer. Participants seek clarification on the relationship between charge, current, and time, with the definition of current being I = dQ/dt. Ultimately, the C cell transfers more charge due to its longer duration of current supply.
majormuss
Messages
124
Reaction score
4

Homework Statement


A 1.5-volt, AAA cell supplies 750 milliamperes
of current through a flashlight bulb for 5.0 minutes,
while a 1.5-volt, C cell supplies 750 milliamperes
of current through the same flashlight
bulb for 20. minutes. Compared to the total
charge transferred by the AAA cell through the
bulb, the total charge transferred by the C cell
through the bulb is
(1) half as great (3) the same
(2) twice as great (4) four times as great


Homework Equations


W= VIt


The Attempt at a Solution


Actually am not absolutely sure which formilar to use.. if I try using the one I provided above then my answer will turn out '3'... bu am still not sure! i Need assistance!
 
Physics news on Phys.org


What equation relates charge, current, and time?
 


The definition of current is I=\frac{dQ}{dt}. What is a formilar?
 

Thread 'Errors and significant figures'

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...
View full post »
Thread 'A cylinder connected to a hanging mass'

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...
View full post »

Similar threads

Capacitor Questions Charging and Discharging
Replies
4
Views
3K
Electric Potential across charging battery.
Replies
5
Views
1K
Answer: Battery Driven Winch - 13.5 m Lift Height
Replies
7
Views
3K
How Much Charge Does a Defibrillator Capacitor Store After 1.10 Seconds?
Replies
2
Views
1K
Electromotive Force: Calculate Charge, E.M.F & P.D.
Replies
1
Views
2K
RC Circ, Capacitor charging Q....very lost
Replies
3
Views
2K
Circuits: Total Energy in a Battery Before Connecting to Bulb
Replies
6
Views
2K
Calculate average current flow in an electric eel (Simple Circuit Questions)
Replies
7
Views
5K
How Does Current Direction and Charge Flow in a Solenoid-Wire System?
Replies
4
Views
1K
PD across the terminals of two cells
Replies
34
Views
3K

Hot Threads

Recent Insights

Back
Top