Recent content by clickcaptain

Homework Statement Use the value: E = 200 V, Horizontal resistor R1 = 1136 capital omega, Vertical resistor R2 = 568 capital omega, and Capacitor C = 5.37 mu or micro F, (a) the initial current through the battery just after the switch is closed: (b) the steady state...

Vector Subspaces, don't understand... Homework Statement Which of the given subsets of the vector space, M23, of all 2 X 3 matrices are subspaces. (a) [a b c, d 0 0] where b = a + c Homework Equations Theorem 4.3 Let V be a vector space with operations + and * and let W be a...

I got Req= 3.8 parallel = 1/Req = 1/2 + 1/2 + 1/4 = 5/4 Req-p = 0.8 so Req = 0.8 + 3 = 3.8 A Then do I use this in V = IR?

So would the current for the first resistor be I = V/R = 6 V/ 2 = 3 ?

Homework Statement The battery in the figure below has negligible internal resistance. Find (a) the current in each resistor: (b) the power delivered by the battery: Homework Equations V = IR Resistor Connected in series Req = R1 + R2 + R3 Resistor Connected in Parallel 1/Req = 1/R1 +...

Homework Statement In a fluorescent tube of diameter 3 cm, 10 *1018 electrons and 2.5 * 1018 positive ions (with a charge of +e) flow through a cross-sectional area each second. What is the current in the tube? Homework Equations Current is I = (delta Q)/(deta T) The Attempt at...

I'm not sure what you mean here, could you expand a little please? Thanks.

Homework Statement A toaster with a Nichrome heating element has a resistance of 150 omega at 20degrees Celsius and an initial current of 2 A. When the heating element reaches its final temperature, the current is 1.73 A. What is the final temperature of the heating element? Homework...

Your way makes sense, and its a lot simpler than what I tried. The answer didn't work though so I'm going to try to keep double checking figures, i can't figure out what else would be wrong.

Homework Statement A 4.6 mu or micro FF capacitor is charged to a potential difference of 15.0 V. The wires connecting the capacitor to the battery are then disconnected from the battery and connected across a second, initially uncharged, capacitor. The potential difference across the 4.6...

Homework Statement 1) A 4.7-mu or micro FF capacitor is charged to 290 V. How much energy is stored in the capacitor? 2) How much additional energy is required to charge the capacitor from 290 V to 780 V? Homework Equations U = 1.2*C*V2 The Attempt at a Solution The...

The answer has to be formatted in Joules.. so its work, but I'm not exactly sure how to get work from an energy field.

Homework Statement What is the electrostatic potential energy of an isolated spherical conductor of radius 24 cm that is charged to 3.9 kV? Homework Equations Electric potential U = (kQ)/r The Attempt at a Solution U = ((8.99 * 109 ) * (3.9 * 103)/(0.24) Could...

Okay, so I tried integrating, I don't think I did it right though. I don't know exactly how to express cos(theta) in terms of x but this is what I tried, please correct me if I'm wrong... r = 0.0483 theta = 55.981 E = integration(8.99*10^9 * (6.5*10^-9)/(0.0483)^2 *cos(55.981)) with...

Homework Statement A uniform line charge extends from x = - 2.7 cm to x = + 2.7 cm and has a linear charge density of lambda = 6.5 nC/m. (a) Find the total charge. Find the electric field on the y-axis at the following distances. (b) y = 4 cm 2. The attempt at a solution It...