The circuit below consists of a battery and a tungsten wire. As shown in the figure, the tungsten wire has a thin (small radius) section in the middle. What happens to the current as it moves from the thick section of the wire to the thin section? O (a) The current increases. O (b) The current is zero. O (c) The current decreases. O (d) Tho curront ic unchangnd

Find the current across the resistor 4 S2 while the switch S is open for a long time. B) (A) 3 V 192 www 252 D) (A) ww 3923 atta SV E) (A) 4 V 452

(5) Current is flowing through a cylindrical copper wire with radius 6.33mm and length 92.1cm. This wire is hooked up to two capacitors in series C1 The capacitors both have cross sectional areas of A = 179cm2. (a) At a given moment in time, the current is I electrons is vd = 9.42µF and C2 = 8.11µF. = 77.97A and the drift velocity of the 45.6µm/s. What is the number density of electrons in this wire? (b) At a given moment in time, the charge on capacitor 2 is 62.6µC. What is the total change in potential across both capacitors combined? | (c) At the moment described in part (b), what is the energy stored in capacitor 2? (d) At the moment described in part (b), what is the energy density of the electric field in capacitor 2? :

Lets say the following electric currents flow into a junction of wires: 6.6 A (amperes or amps), -2.2 A, 6.7 A,  and last but not necessarily least 9.2 A.   What current in A flows out of that very busy junction?

Two lightbulbs operate on the same potential difference. BulbA has four times the power output of bulb B. (a) Which bulb hasthe greater current passing through it? Explain. (b) What is theratio of the current in bulb A to the current in bulb B?

(a) A defibrillator passes 12.0 A of current through the torso of a person for 0.0100 s. How much charge moves? (b) How many electrons pass through the wires connected to the patient?