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- A charge of 4.00 C of charge passes through a pocket calculator’s solar cells in 4.00 h. What is the power output, given the calculator’s voltage output is 3.00 V? 2.45 x 10-4 W 8.33 x 10-4 W 6.25 x 10-3 W 1.88 x 10-3 WHow much energy is stored in 1.00 m3 of air due to the “fair weather” electric field of magnitude 150 V/m?23- A voltage of 3 V is applied to a copper wire 0.5 m long. What is the magnitude of the average velocity of the free electrons in the wire, in mm/s (millimeters per second)? (Note: Average time between collisions at room temperature t=2.7x10^-14 s) A) 26 B) 24 C) 20 D) 22 E) 28
- A current of 0.5 A exists in a 60-ohm lamp. The applied potential difference is: A. 15 V B. 30 V C. 60 V D. 120 VWhat is the number density of free electron carries in the metallic element nickel if the electrons available for electrical conduction is 1 e- per nickel atom? The atomic mass of nickel is 58.6934 g/mole and the density of nickel is 8.902 g/cm3. a. 3.32 x 1028 e- ' s /m3 b. 1.56 x 1029 e- ' s /m3 c. 5.64 x 1028 e- ' s /m3 d. 9.13 x 1028 e- ' s /m3 e. 7.63 x 1028 e- ' s /m3find electrical space with fixed linear load density, infinity length, linear plus r distance from a load. k=9.109 Nm2/C2 εo=8,85.10-12 C2/Nm2
- how much energy is available from a 12 v storage battery that can transfer a total charge equivalent to 100000c?If the density and atomic mass of copper are respectively 8.80 103 kg/m3 and 63.5 kg/kmol (note that 1 kmol = 1,000 mol), and copper has one free electron per copper atom, determine the following. (a) the drift speed of the electrons in a 10 gauge copper wire (2.588 mm in diameter) carrying a 30.5 A current m/s(b) the Hall voltage if a 1.18 T field is applied perpendicular to the wire VA 0.686-meter-long wire has a cross-sectional area of 8.23 x 1 0-6 m2 and a resistance of 0.1 25 ohm at 20° Celsius. This wire could be made of A. aluminum (p = 2.82x10 a Q m) B. nichrome (p = 1.50x1 O'6 Q m) C. copper (p — 1.72x 1 0’8Q• m) D. tungsten (p = 5.60x 1 08Q- m)
- Is Ohm’s law universally applicable for all conducting elements? If not, give examples of elements which do not obey Ohm’s lawIf C1=12 µF and C2 = 4 µF and the battery voltage is 24 V, calculate the charge supplied by the batteryIn response to a stimulus, an electrical pulse is excited in a nerve cell, with 0.5 nC of chargein the form of Na+ ions moving across the cell membrane. How many Na+ ions cross themembrane during this process?