R1 = 15 N R2 = 10 N Data Experimental Data Computed %Difference Vr, Voltage Across Battery, V 10 Vi (Voltage Across R1), V2 (Voltage Across R2), In (Current Flowing Through R1) A I2 (Current Flowing Through R2) A Total Current, Ir (A): R2
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- ELECTRICAL POTENTIAL AND CURRENT: V IR E-P P IV C Pt Series Circuits: Parallel Circuits: V, = V, + V,+ V, +. V, = V, = V, V, .. 1. 1. R, = R, + R, + R, +. RT R, R Based on the circuit drawn below: (Please use your VIRP chart) R = 15 Q V = 120 V R2 = 20 2 R3 5 2 W-Q2. To determine the galvanometer's internal resistor R. and its maximum electric current Is, corresponding to a maximum deviation of its needle, we mount it in series with a rheostat, as shown in the adjacent figure. R a b son Reosta Galvanometre When the needle makes a maximum deviation Vab = V1 = 5 V and Rr= R1 = 80 k 2. When the needle makes 1/2 maximum deviation Vab = V2 = 2 V and Rp = R2 = 60 ko. When the needle makes 44 maximum deviation Vab = V3 = 2 V and Rr = R3 . V a) Write the relationship between V1, R1, Rc and le. b) Write the relationship between V2, R2, Re and Ic. c) Write the relationship between V3, R3, Re and Ic. d) Determine the values of Re and Ic. e) Determine the value of Rs. Answer:C2 C1 XS R 5. From the figure above, a pair of charged capacitors are given C1 and C2 = 2 µF which are charged with a battery of 12 V. Determine then, how much charge between both capacitors is left after the switch has closed for over 1ms? How much is left for the capacitors C1 and C2? Lastly, determine the . 1 μF current of the circuit after this time.
- (a) ww 20 7V ww 90 JV IV FIGURE 3.1 RAJAH 3.1 For the circuit in FIGURE 3.1, determine the Untuk litar dalam RAJAH 3.1, tentakan () current h. h and h arua h. h dan h. (i) mumber of electrons passing through the 9 0 resistor in 2s. bilangan elektron melalut perintang 9 a dalam 2 (ii) power dissipated by the 5 0 resistur. kuana terlesip oleh perintung 5 a. (iv) change in the resistance of the 20 resistor when there is a 30 "C rise in its temperatire. The temperature coefficient of resistivity of the resistor is 6.8 x 10C. perubahat rintangan pada perintang 20 apabila nhunya meningiat sebanyuk 30 "C. Pekali kerintungan suhu perintang lalah 6.8 x 10- C,Q2. To determine the galvanometer's internal resistor Re and its maximum electric current I. , corresponding to a maximum deviation of its needle, we mount it in series with a rheostat, as shown in the adjacent figure. İbre Reosta When the needle makes a maximum deviation Vab = V1 = 5 V and Galvanometre R, = RỊ = 80 k2. When the needle makes ½ maximum deviation Vab = V2 = 2 V and R; = R2 = 60 k2. When the needle makes ¼ maximum deviation Vab = V3 = 2 V and R, = R3 . V Write the relationship between V1 , R1 , R. and I. Write the relationship between V2 , R2 , Re and Ic. Write the relationship between V3 , R3 , Re and Ic. Determine the values of R- and I . Determine the value of R3. a) b)Question A3 A large capacitor of 3000 µF is charged by a constant current. After 1 minute it reaches a voltage of 100 V. At that voltage, the charging circuit is disconnected. a) Calculate the charging current. b) A second identical capacitor is connected across the capacitor, using wires with 1 kN re- sistance. Sketch a graph of the voltages on the two capacitors as a function of time, with appropriate numbers and units marked on the axes.
- How long willit take a charged 80 uF capactor to lose 37%% of its initial energy when it is allowed to discharge through a 45 O resistor? a. 3.58 ms O b. 1.66 ms Oc 1.79 ms O d. 0.51 ms Oe. 0.83 ms Next page Dage Introduction to Phys102> Jump toElectric field coupling circuit equivalent is shown below. Let Rs = Rs2 = 10 ohms and R = R12 = 100 ohms, C,,=2pF. Calculate the crosstalk due to electric field coupling between these circuits at 100 MHz. RL2 R$2 Rs1 Vs2 Vs! OB/A metal object having a length (10 m), cross section area (0.5 mm2), and resistance (0.34 2) is connected to an electric field intensity (0.5 V/m). If the density (concentration) of free electrons equals (8.5*1028 electron/m³ ), Calculate: 1) The object's conductivity. 2) The electron's mobility. 3) The drift velocity. 15 M
- 1. A hollow cylinder of length L, inner radius R1 , and radius R3 is filled with two different materials. From R1 to R2, the space is filled with a material of resistivity p1 . From R2 to R3 , the space is filled with material of resistivity p2 . a) Derive an equation for the resistance of this structure as current flows from R1 to R3 (ALONG the radial direction, NOT along the length). Ignore edge effects. b) If the total voltage across the object is Vo, find an expression for the current density along the objects ( i.e. find J(r)). Take V= Vo at R1 and V=0 at R3O C045% D 2:49 Question 1: R: Rs Re V Rs In the above circuit, R1 = 100, R2 = 200. R3 = 150. R4 = 50, RS = 300 and R6 = 400. The battery voltage is 9v. 1. The equivalent resistance of the circuit is 2. The source current is 3. The voltage drop across R5 is 4. The current through R2 is A S. The power dissipated across R1mid 9634&page 3 A conductor has a cross-sectional area of 2.3x 10 m and the number of free electrons per unit volume is 8.5x 104 electron/m'. When the current is 10.2 A, find the drift speed (in mm/s) of the electrons. Use the charge of the electron to be 1.6x 10 C. Select one: OA. 0.43 OB. 0.33 OC. 32.61 OD. 0.22 OE. 42.81 page Next page 9:03 P A OD A de ENG 4/30/20 nert 17 V Badapace Nom Sok Y 7 GYH K 4. 15 Enter BYN M 1 Shift End Ead