Three resistors, 34 , 65 , and 11002, are connected in series, and a 0.70-A current passes through them. What are (a) the equivalent resistance and (b) the potential difference across this equivalent resistance?
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- The resistance of the skin on a person's finger is typically about 10,000 N. How much voltage would be needed to cause a current of 0.001 A to flow into the finger? (This is about enough current to just be felt by most people.) Need Help? Read It Watch It MY N OTEC [-/2 Points] DETAILS OBINPHYS8 7.P.013.With dry skin of the hands, the resistance between the palms of the hands can reach R1 Ohms). Find the current that will pass through the human body in contact with a U = 220 V power grid. Compare this current with the threshold values of tangible and non-releasing currents. 105 Ohms, and with wet hands this reşistance is much less (R2 = 103Using Kirchhoff's rules, find the following. (E, = 71.0 V, E2 = 62.0 V, and E, = 79.8 V.) 4.00 ka |E, |E. Ra R$ 3.00 kN 2.00 kN R (a) the current (in mA) in each resistor shown in the figure above IR2 mA mA (b) the potential difference between points c and f (Give the magnitude of your answer in volts and select the point of highest potential.) magnitude of potential difference point at higher potential --Select--- v (c) What If? If all of the resistors in the circuit were decreased in value by a factor of 1,000, would the current in each resistor simply increase by a factor of 1,000? Explain your answer.
- A (20.1 +/-0.2) ohms resistor is connected in parallel with a (39.9 +/- 0.4) ohm resistor. THe resistors are connected to a (2.90+/-0.3)V battery. a) Find the equivalent resistance (including uncertainty). b) Calculate the toal current in the circuilt (including uncertainty) c) Determine the value of the current in each branche of the circuit (including uncertainty). A image is included to the question.The potential difference across a resting neuron in the human body is about 70.0 mV, and the current in it is approximately 200. micro Amps. How much power does the neuron release?) An electron beam consist of 1016 electrons passing through a given cross section n one minute. (a) Determine the current in amperes. (b) If the potential difference between the tip of the electron gun and the screen is 5000 V, determine the resistance of the path taken by the electron beam.
- A 660-N resistor is connected to a variable-voltage power supply. (a) What voltage is necessary to cause a current of 0.7 A in the resistor? V.Two resistors of resistance 230 O and 340 O are connected in series (one after the other). A potential difference of 20 V is applied between the ends of the chain. a)What is the total resistance of the circuit (in O)? Give your answer as a whole number. b)Calculate the current flowing through the circuit (in A). Gve your answer to 3 d.p. and use this value to that degree of accuracy, in subsequent calculations, if needed. c)Calculate the potential difference across the 230 O resistance. Give your answer in volts to 2 d.p..In an experiment, the current througha wire is 0.200 A and the voltage across the wire is 0.800 V. The length of the wire is 0.500 m and its diameter is 1.128 mm. What is the resistivity of this wire? 1.00x10^(-6) ohm.metre none of them 2.00 ohm O 1.00 ohm O 8.00 ohm O 1.00x10^(-6) ohm/metre O 4.00x10^(-6) ohm/metre O 8.00x10^(-6) ohm.metre O 4.00x10^(-6) ohm.metre O 8.00x10^(-6) ohm/metre
- 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…In the circuit shown, 30 Determine the following: 2v+ A. Magnitude and direction of the current B. The potential differences Vad, Ver and Vne 7 V 6 V+cs-IIB Physics-IIB 500 75.J In a potentiometer experiment, the balancing nown length with a cell is 560cm. When an external fo aps of resistance of 10 ohms is connected in parallel to the cell the balancing length changes by 60 cm. The internal resistance of the cell in ohms is: When 2,the 1) 3.6 2) 2.4 1.2 4) 0.6 (76) The resistivity of a potentiometer wire is, if the area of cross section of the wire is 4cm? the current x' is flowing in the circuit is 1A,the potential gradient is 7.5 v/m Own ght t is 3 × 103 2-m 2) 2 x 1062-m 3) 4 x 1022-m 4) 5 x 1042-m A potentiomete wire of 10m length and 20 Ohm resistance is connected in series with a resistance R ohms and a battery of emf 2V, negligible internal resistance. Potential gradient on the wire is 0.16 millivolt/centimetre then R is---ohms A 230 77. ea 1) 50 2) 60 4) 46.6 gREDMI NOTÉ GIPRO meter has a wire of 100cm length MI DUAL CAMERA and its resistänce is 10 Ohms. It i 2021/11/17;22effes nected in