Recent content by IvaNMK

Homework Statement [PLAIN]http://img510.imageshack.us/img510/3893/58096739.jpg Homework Equations F = ma, friction... The Attempt at a Solution I just want to understand the problem so I can do it. 1a. If I apply 18N to box A, does it actually move? or it just reaches the max...

Homework Statement Monochromatic green light of wavelength 546 nm falls on a single slit with a width of 0.095 mm. The slit is located 75 cm from a screen. How wide will the central bright band be? Homework Equations D sin 0dark = m 入 The Attempt at a Solution Can...

What is the answer? Should be B Please Explain the reason behind I don't understand how an induced Magnetic Field will cause the coil to move. (Not Homework)[SIZE="2"]Source:tycphysics.org/TIPERs/TIPER%206_20_02_keys%20pdf/EMI%205a_Key_6_02.pdf thanks for helping

Thank you for helping again! I don't quite understand this part. Do you mean voltage drop? So if I have a given voltage and resistance, i can calculate the current through the resistor and that current is the same throughout the resistor? "voltage must change indirectly with resistance"...

Thank you What do you mean by opposes current? Push the current back? So resistor will reduce voltage, but not current? So will the voltage be lesser after it pass one or several resistors? Keep decreasing?

~~Resistor Concept~~ Hi. I am having trouble with understanding the resistor. What does a resistor do in SERIES or in PARALLEL circuit? My understanding: ( please correct me if i am wrong!) In series circuit, Resistor is a device that reduce the current in the circuit. And according to...

you mean that lightbulbs in series receive less current than those in parallel? Isnt that Current is the same throughout the whole series? and Total current in parallel circuit is the sum of all currents flowing thru all branches?

YES, they are.

Homework Statement How do the bulb's brightness compare? Which ones will be brighter or dimmer? What will happen if a resistor is placed before Bulb 2? and What will happen if a resistor is placed between Bulb 2 and 3? Does it matter if i place the resistor before or after the ammeter? Will...

First of all, Thank DeShark and DrZoidberg for helping. I understood a lot from reading your response. Just want to make sure, does the negative charge electron only move from negative side of a battery to the positive side? That means the current is from - to +? My book always shows the...

I have seen lots of things with voltage written on them. So what is voltage, what does it do? Does a battery contain tons of electrons (or protons, i don't know) on the positive side, and then when i use a wire to connect the both sides, what would happen? All the charged particles flow...

Homework Statement I do not understand why the PE is positive when 2 charges are the same sign, and PE is negative when 2 charges are opposite signs Picture Homework Equations W = - Delta PE The Attempt at a Solution I don't know how the how the forces go. What it means by +...

Hi. I am new, don't close my thread please My Question is the - sign in front of the equation Delta V = Ed , or Delta V = - Ed, Which one is true? Delta V = Ed , or Delta V = - Ed ?? The Attempt at a Solution