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- How does the resistance for copper and for silicon change with temperature? Why are the behaviors of these two materials different?Do impurities in semiconducting materials listed in Table 9.1 supply free charges? (Hint Examine the range of resistivity for each and determine whether die pure semiconductor has the higher or lower conductivity.)2.4 Ohm's Law 38. Determine the magnitude of the current flowing through a 4.7 k2 resistor if the voltage across it is (a) 1 mV; (b) 10 V; (c) 4e V; (d) 100 cos(5t) V; (e) -7 V. 39. Real resistors can only be manufactured to a specific tolerance, so that in effect the value of the resistance is uncertain. For example, a 1 2 resistor specified as
- In the figure resistor 1 = 126 2, resistor 2 = 81 N, and the ideal batteries have emfs ɛ1 E2 = 5 volts, and ɛ3 = 7 volts. Find the current through resistor 1. = 29 volts, Round off answer up to 3 decimal places. Consider absolute value. Include the unit (A for ampere, V for volt and ohm for ohm). Rz RI wwe 11: r 711 ".llAsiacell O Home work... -> Determine the values of the current flowing through each of the resistors. If 13 = 0.3A R 102 Ra A 202 10v 20v V, V2 40 2 R4=104/4 81. Determine the current through each resistor showr below. R -2 k24 www V, - 1.6 V V2 = 1.4 V R2 = 1 k2 R, 1 kl2
- An 80-2 resistor and a 20-2 resistor are connected in parallel, and then this combination is connected in series with a 32- resistor and a 24-V battery. An ammeter to measure the current through the 80- 2, and a voltmeter to measure the potential difference across the 32 Q is needed. TOraw the cireit 2 K he total 1e meter astanco of the cire What is the difference -potential across the 32-Q resistor? Across the 80-2 resistor? = 5. What is a fuse and how does it protect a circuit or device to which it is connected? 6. Show using diagrams how using only 2 Q resistors the following resistances can be made: ( a) 0.5 Ω (b) 1 Ω, ( c )3 Ω; ( d ) 5 Ω. 7. Three wires in a circuit meet in a common point. The currents flowing in two of them are 2 A and 3 A respectively. What are the possible values of the current in the third wire? Explain your answer [drawings would help]. D koksch_b201pdt Show AN MacBook Air esc 288 10 F11 F12 %23 & 2 4. 6. 8 9 11 delete Q W R T Y tab ps lock S D G H J. 11 K L…A resistor is found to have a resistance of 100Ωat 20oC and a resistance of 112Ω at 55o What is the Thermal Coefficient of Resistivity of the resistor? Got 3.43 x 10-3 or 0.00343 and said it was wrong, so I need help figuring out the right answer.dew meeting 4. Consider the circuit given below. V 20 V, RI = 2 2, R2 = 5 0, R3 = 10 2 and R4 = 8 2. Calculate the current and the voltages across each resistor. oin a meeting Boot Barn AEL ROBINSON, Your order is on its way! Sign Feb 20 Ri uts Navy Federal Credit, Feb 20 mael service@paypal.com een processed Hello, ISHMAEL ROBINSON Yo.. Feb 20
- Resislance, ef the uoltmelei is lo000 ohm to increcte songe of uoltmeler fuom 25V lo 250 V, HeSie lance connected in setes is- O 990 ohm O 999à ohm ☺ gooo0 ohm d) 90 ohm.Calcur te the current through a 10.0-m long 22 gauge (the radius is 0.231 mm) nichrome wire if it is connected to a 12.0-V battery. (The resistivity of nichrome is [100 × 10-8Nm] A 0.388 A 0.201 A 61.8 A 0.776160% P 2:35 Asiacell I. H.W -2.pdf H.W -2 6. For the circuit board in Fig. 7.66: a. Find the total resistance Ry of the configuration. b. Find the current drawn from the supply if the applied voltage is 48 V. c. Find the reading of the applied voltmeter. 6.8 kf V 1.2 k? 3.3 kN 2 kn Rr - 2.4 k2 48 V FIG. 7.66 Problem 6.