<p>can someone break these topics down for me?? and also the direction of currents and similar things???
thanks a lot</p>
<p>I agree its the only Physics I don't understand lol =/</p>
<p>There are 4 right hand rules. (I think they only work for perpendicular ones. If it's at an angle, force points towards an angle)</p>
<p>One is where you point thumb towards current, fingers towards magnetic field, and the palm of your hand is where the force would be. </p>
<p>Another one is where you wrap your hand around a coil where current if flowing. Your thumb would point in the direction of the magnetic field.</p>
<p>Another one is where you point your finger towards the velocity and i think "wrap" your fingers towards the magnetic field and your thumb points towards the direction of the force.</p>
<p>The last one, i'm not sure..</p>
<p>I think that's all, but I may be wrong. =O</p>
<p>have fun tomorrow. I'm glad I'm not taking physics. lol</p>
<p>How do you do right hand rules when they're on a plane (not perp in the problem)?</p>
<p>Another hand rule is for solenoids. You wrap your fingers in the direction of the current as if grabbing the solenoid, and the thumb points in the direction of magnetic north.</p>
<p>Then there's the electromagnetic radiation. Index points in direction of propogation, thumb points up in direction of...electric field I think, and the middle finger points perpendicular to the index to indicate magnetic field.</p>