Solve Resistance Problem: Parallel Resistors, Closed Switch & 1.2A Reading

Thread starter prat
Start date Jul 30, 2009
Tags

Resistance

AI Thread Summary

In a circuit with three parallel resistors of equal resistance and an ammeter reading of 1.2A when the switch is open, closing the switch will change the current flow. The total resistance in a parallel circuit decreases when more paths are available for current. The current will increase when the switch is closed due to the reduced total resistance. To determine the exact current when the switch is closed, additional information such as the resistance value or a diagram is needed. Providing these details will help in calculating the new current accurately.

Jul 30, 2009

prat

Homework Statement

if there is a circuit in which switch is open and ammeter reading is 1.2A THERE ARE THREE RESISTORS PARALLEL WHO HAVE SAME RESISTANCE.WHAT WILL BE THE CURRENT WHEN THE SWITCH IS CLOSED

Homework Equations

The Attempt at a Solution

Physics news on Phys.org

Jul 30, 2009

Kaimyn

Do you have any more information? Perhaps a diagram?

Also, show everyone what you have done so far.

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...

View full post »

Thread 'Explain this asphalt sheen'

This problem is two parts. The first is to determine what effects are being provided by each of the elements - 1) the window panes; 2) the asphalt surface. My answer to that is The second part of the problem is exactly why you get this affect. And one more spoiler:

View full post »

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 »