Recent content by cy19861126

Okay, I read my text and I'm guessing the answer might be as follow but I do not know why: a) Right to left b) no current c) left to right

Lenz's and Faraday's Law Induction. Help on resistor and switches! Homework Statement Find the direction of the current in the resistor shown below a) at the instant the switch is closed b) after the switch has been closed for several minutes and c) at the instant the switch is opened...

Homework Statement A magnet is hung by a string and then placed near a wire as shown. When the switch is closed, the magnet rotates such that the ends of the magnet move as indicated by the arrows. At the instant the switch is closed determine: a) the direction of the current through the wire...

There's no direction because the two direction from the two wires cancel out. One is going into the page and another one is going out of the page

Homework Statement Two long parallel conductors carry currents I1 = 3.00A and I2 = 3.00 A, both directed into the page as shown below. Determine the magnitude and direction of the resultant magnetic field at P. Homework Equations B = uI/(2*3.14*r) u = 1.26*10^-6 T*m/A The Attempt at a...

Homework Statement The two wires shown below carry currents of 5.00 A in opposite directions and are separated by 10.0 cm. Find the direction and magnitude of the net magnetic field a) at a point midway between the wires b) at point P1, 10.0 cm to the right of the wire on the right, and c) at...

How can the electric field be constant? E = k*(q/r^2) As you can see, electric field is dependent on the distance on the point charge

From your statement, it seems that voltage and current are directly related. Increasing the current increases the voltage by using the equation, V = IR. However, there is also this other equation P = IV. This equation shows you that current and voltage are inversely related. How can this be so?

Homework Statement In this problem, box A and box B contain unknown combinations of light buls. Bulb 1 is identical to bulb 2. The batteries are ideal. 1. a) In the circuit A (see first attached pic) the voltage across bulb 1 and the voltage across box A are equal. What, if anything can...

C'mon, can someone answer my question please. I want to understand the problem rather than getting an answer. Any help will be appreciated.

In general, does more current/less resistence mean the brighter of the light bulb? How does voltage take into account in this case

I thought that as long as there is constant force, there is always constant acceleration, unless force is changing at some point...

It doesn't matter if you define force to be positive or negative. You can set the coordinate system whichever way you want. But if the direction of force and the displacement traveled are the same, then work is positive. In this case, force and distanced traveled are the same, I think. If I am...

oh okay, i just got it from one of your replies ranger, thanks

Sorry, but I am just not getting this. E = k (q/r^2). As you can see, E depends on the distance between the charges acting on it. I know you're definitely right because the book says so, but it really did not explain much into it.