The electric field has to flow in a direction (from positive to negative) in the same direction as the force from the magnetic field correct? that way the electron will be attracted back, canceling out the force from the magnetic field, allowing it to travel in a straight path. Am i right?
What magnitude and direction would an electric field, E, need to be to cancel out the force on an electron traveling with speed, v, in magnetic field B?
I know the formula for the force on an electron in a magnetic field is F=qvB. The formula for the force on an electron in a electric field...
A L-R-C series circuit contains a 1x10^-6 F capacitor, a 7.00 mH coil and a 90 ohm resistor. What is its resonant frequency?
For this one I used the formula for capacitive reactance.
Xc=1/2pi*fC
After doing some algebra i isolated the frequency giving me :
f=(1/Xc)/2pi*C.
So i...
An electron of mass 9.11 x 10-31 (9.11e-31) kg travels in a circular orbit within a large evacuated chamber. The orbit has a 2.0 mm radius and is perpendicular to a B-field of 0.030 T. What's the electron's speed?
For this problem, the only equation i can think to apply is F=qvB.
I know...
The return stroke of a bolt of lightning typically carries a peak current of 24 kA up from the ground. What is the maximum magnetic field associated with the bolt 1.4 m away?l;
I'm just having trouble finding the right formula for this problem
is the correct formula B= (4pi x 10^-7* I)/2pi...
The little speaker in a portable radio is labeled 16 Ohm's , 0.1 W. To what current does that correspond?
I'm kind of confused where to go with this one. what i know is this, 1 watt=1volt*1amp, but where do i go from there?
Do I have to use Ohm's law somehow? V=IR.
So does VI=.1 and...
Electric field lines always point toward:
(_) positive charge
(_) a region of higher potential
(_) ground
(_) a region of lower potential
(X) none of these
Now, i thought that electric fields point towards the negative charge. I submitted my homework, and i missed it. I...
A cylinder-and-piston containing an ideal gas is placed in contact a thermal reservoir. The volume of the gas is very slowly changed from 55 liters to 8 liters as 50 J of work is done on it by an external agency. Determine the change in the internal energy of the gas
and the amount of heat...
sweet thanks. that pointed me in the right direction i do believe
i substituted (Tf-To) for delta T, and solved for Tf coming up with a final temperature of 76.46 degrees celclius. that sound right?
thanks again for the help
A 330-g glass mug at 16C is filled with 275 milliliters of water at 91C. Assuming no losses to the external environment, what is the final temperature of the mug?
Im having a bit of trouble with this problem. Since we're assuming no losses, delta q=0.
So, delta q= delta q(mug) + delta q...
wait i may have got it, is the distance between a node an and anti node simpy 1/26?.
Since there's a node at the open end, and an antinode at the closed end, and the tube is 1 m long, i should be able to count the number of nodes and antinodes and divide one by that answer to get the distance...
http://137.229.52.100/~physics/p103/applets/sos_prelab/sos_prelab_pt1.html
For my homework, i have to use this java applet and answer the 5 questions at the bottom. Now, i had no problem finding the period, frequency, or length of the tube in terms of the wavelength. But I'm really having...
A thermometer has a quartz body within which is sealed a total volume of 0.410 cm3 of mercury. The stem contains a cylindrical hole with a bore diameter of 0.10 mm. How far does the mercury column extend in the process of rising from 10°C to 86°C? Neglect any change in volume of the quartz.
I...