A piece of unmagnetized iron at room temperature consists of a) iron atoms with

Question

A piece of unmagnetized iron at room temperature consists of a) iron atoms with randomly oriented magnetic moments b) microscopic domains each of which has a magnetic moment In electroconvulsive therapy an electric current is passed through the brain of a severely depressed patient and, surprisingly, the patient often feels better. Somewhat similar results are obtained with the technique of Trans- Cranial Magnetic Stimulation (TCM) in which the applied potential difference is replaced by (a) a constant magnetic field (b) a time-varying magnetic tie (c) a constant electric field c) a time-varying electric field. Household sockets are generally wired in parallel. T/F. In most electric distribution systems the circuit is protected from overload by fuses or circuit breakers in series/parallel with the various electrical devices. A 2 mu F. 3 mu F and a 6 mu F capacitor are placed in parallel, across the terminals of a 6.0 volt power source. Starting with uncharged capacitors, how many Coulombs will flow through the battery to fully charge the capacitors ? In the above mentioned circuit suppose the 2 mu F capacitor has a 2 ohm resistor in series with it. the 3 mu F capacitor has a 3 ohm resistor in series with it. and the 6 mu F capacitor has a 6 ohm resistor in series with it. which capacitor will charge fastest Non Answer 5 of the following 7 questions. Show the bask equations you are using if pertinent Rubric 11 points each Physically relevant equation 5 points Units not given -5 points Minor arithmetic error 2 points Absurd answer or unjustified answer; -11 A ring of area 1.00 cm^2 is placed between the poles of an electromagnet. How fast does the magnetic field need to be changing to induce a current of 0.200 mA?

Explanation / Answer

10.

Ans: b.Microspic domains, each of which have magnetic moments

11.

b. pulsed i.e. time varying magnetic field

12.

True

13.

Series

14.

Q = C*v = (2+5+6)*6*10^-6

=6.6*10^-5 C.

15. The one which have least time cosntant T = RC, i.e. 2 muF capacitor.

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