If there is no R2, then the battery charges the capacitor.
Btw, that raises another question.
Since electrons are the charge carriers and electrons cannot ever travel to positive side of the capacitor, does the resistor 1 connected to the positive plate of the capacitor play a role? I am so...
I understand that a beta plus decay emits positron and beta minus decay emits electron. For the calculation of kinetic energy of the particle released, you take into account the mass of electron for beta plus, but why is it that you DON'T take into account the mass of electron for beta minus? I...
circuit with an uncharged capacitor -- desperate
Homework Statement
http://img91.imageshack.us/img91/7533/physicsimage.gif [Broken]
Switch S has been open for a long time. It is closed suddenly at t=0.
A long time later, it is opened.
Determine the potential across and the current through each...
Homework Statement
http://img291.imageshack.us/img291/9572/picture2ehv.png [Broken]
What is the strength of the magnetic field at point P?
The answer is 7.9×10^−5 T.
However, I used the equation B = u*I/(2*pi*d) and keep getting 5*10^-5 T.
Homework Equations
B = u*I / (2*pi*d)...
Homework Statement
This is not a specific problem, but I am wondering, what exactly determines the brightness of identical bulbs? The current going through it? The voltage? Something else? Thanks.
Homework Equations
N/A
The Attempt at a Solution
N/A
Well... the problem is that.. I got this far:
emf = | d(flux)/dt |
= dB * A / dt
= dB (0.04*0.01) / dt
= dB (4*10^-4) / dt
but i do not know how to get dB...;
in other words, i am totally lost.
I have B(r) = u0I/(2*pi*r)
This is my first time seeing this type of question.. and I am very...
Homework Statement
The rectangular loop shown has resistance 20.0 mΩ.
Determine the induced current in the loop at the instant shown.
Answer: 66.7µA
http://img264.imageshack.us/img264/7386/picture1nlz.png [Broken]
Homework Equations
induced emf = |d(flux)/dt|
I = emf / R...
Homework Statement
A 10-turn coil of wire having a diameter of 1.0 cm and a
resistance of 200m Ω is placed in a 1.0 mT magnetic field. The
coil is connected to an uncharged 1.0µF capacitor. The coil is
quickly pulled out of the magnetic field. Determine the total
charge which...
Homework Statement
A proton and an alpha-particle are fired directly toward each
other from far away each with an initial speed of 0.01c.
Determine their distance of closest approach measured between
their centres.
Homework Equations
See below.
The Attempt at a Solution
What I did...
Homework Statement
A proton is fired from far away towards a Hg nuclide.
Determine the distance of closest approach of the proton to the
centre of the nuclide when the initial speed of the proton is
4.0 * 107 m/s.
(Answer: 13.8 fm)
Homework Equations
(1/2)mv2 = kqq/r
The Attempt at a...
Homework Statement
Determine the speed of a proton whose kinetic energy is 500 MeV. The mass of a proton is 938.27 MeV/c2.
Homework Equations
K = (1/2)mv2??
The Attempt at a Solution
The correct answer is supposed to be 0.758c, where c is the speed of light.
Of course, I plugged...