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If three cells of 1V, 1.5V, 2V are connected in series, then the total e.m.f will be:
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- Ex. 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 E1In a 2 ns interval, 10^8 electrons are discharged from a capacitor. What is the average current flow, in mA, due to this discharge?Given the equation V =Voe-(7.7x10-)t. at what time will the voltage drop by its original value? Select one Oa t= 155 O b. t= 165 Oc t= 145 O d. t= 175
- If three cells of 1V, 1.5V, 2V are connected in parallel, then the total e.m.f will be: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 ?18KJ for 5 ts minut affliane usis voltige g 200 V liance an enegy Gi curlnt 200V. Fud flaney at teay the
- An 800w electric iron operates on 110V. How many electrons pass through the iron per second?When a 200 ohm resistor, a 300 microfarad capacitor (uF) that's initially uncharged, and a 6-volt battery are wired in a series formation, what is the starting current, measured in milliamps (mA)?A current of I= 25A is drawn from a 100-V batteryfor 30 seconds. By how much is the chemical energy reduced?
- H 3a 6v R tami V ܝܐ 412 www. 5a 8 www 12V FIND: V, I, & RIn 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 ww) 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.