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- what is the total resistance? Assume that the current enters one coraer and the sides of a cube. exits at the diagonally opposite corner. B. A cell with internal resistance of 1.0 o is connected in series withn5.0 oresistor and 3.0 N. The voltage across the 5 n resistor is 5 V. (al What current flows through the circuit? (b) What is the voltage across the 3 a resistor? iel What is the terminal voltage of the cell? (d) What is the emf of the cell? 9. There are 100 graduations In the scale of an ammeter with internal resistance of 0.18 n and intended to measure a current up to 10 A. (a) What is the value of each graduation? (b) Convert this to an ammeter that can measure up to 100 A. (c) How will the value of the graduations change? 10. There are 30 graduations in the scale of a voltmeter with an internal ading of 30 V.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 wwAn 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…
- 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.mam/sir how do u draw an electrical circuit, with a voltometer and a anmeter.You are asked to measure e.m.f of a cell. Which instrumentwill you use? A high resistance Voltmeter or Potentiometer andwhy?
- uly 2021 Vems is always equal to maximum voltage (V) Select one: True O FalseEx. 68 : The length of potentiometer wire is 4 m and its resistance is 18 Q . A battery if e.m.f. 2 V and internal resistance 2 Nis connected across the wire. Calculate the potential gradient. If the balancing length for a cell of e.m.f. E1 200 cm, calculate E13:26 A docs.google.com Using ohm's law, determine how much electrical current will flow through this circuit. Your answer 60V ww Vこ? What is the voltage drop across the 4 ohm resistor?
- IN 77. If electric power is transmitted over long distances, the resistance of the wires becomes significant. Why? Which method of transmission would result in less they ofte wires. W F6 84. (a) energy wasted-high current and low voltage or low current and high voltage? Explain your answer. resistane V and b i potentia V is ap 78. The ideal batteries have emfs 12 V and %3D 6.0 V. What are (a) the current current, the dissipation rate in (b) resistor 1 (4.0 2) and (c) resistor 2 (8.0 2), and the energy transfer rate in (d) battery 1 and (e) battery 2? Is energy being supplied or absorbed by (f) battery 1 and (g) battery 2? 79. Consider 85. A series, a applied capacit 4F constar 10.0 2 25.0 V capacit the circuit shown. Find (a) 10.0 2 86. Cc the current the 20.0-2 resistor and (b) potential difference between points a and b. the 20.0 2 75 00'S 80. An automobile battery has an emf of 12.6 V and an internal resistance of 0.0800 2. The headlights together present equivalent resistance 5.00…Ex. 14 : A potentiometer wire has a length of 4 m and resistance 42. What resistance must be connected in series with the potentionmeter wire and a cell of e.m.f. 2V having internal resistance 20 to get a potential drop of 10 3 V/cm along the wire ?A neart pacema ker 4ires 69 times a minute eachtime a a5.0nf capacitur is charged Cbya batterin seris w Hh a resisTor) TO 0.oda 07 1t5 qull voltageS=69+ime per minuts What is the value o7 therSIstance in r? R=?