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- A 160F capacitor charged to 450 V is dischargedthrough a 31.2k resistor, (a) Find the time constant.(b)Calculate the temperature increase of the resistor, given that its mass is 2.50 g and its specific heat is 1.67kJ/kg °C,noting that most of the thermal energy is retained in the short time of the discharge, (c) Calculate the new resistance, assuming it is pure carbon. (d) Does this change in resistance seem significant?A battery has an emf of 15.0 V. The terminal voltage of the battery is 11.6 V when it is delivering 20.0 W of power to an external load resistor R. (a) What is the value of R? (b) What is the internal resistance of the battery?A 20.00-V battery is used to supply current to a 10-k resistor. Assume the voltage drop across any wires used for connections is negligible, (a) What is the current through the resistor? (b) What is the power dissipated by the resistor? (c) What is the power input from the battery; assuming all the electrical power is dissipated by the resistor? (d) What happens to the energy dissipated by the resistor?
- In Figure 21.41. does the graph indicate the time constant is shorter for discharging than for charging? Would you expect ionized gas to have low resistance? How would you adjust R to get a longer time between flashes? Would adjusting R affect the discharge time?An ECG monitor must have an KC time constant lessthan 1.00102s to be able to measure variations involtage oversmall time intervals, (a) If the resistance of the circuit (duemostly to that of the patient's chest) is 1.00kTwhat is the maximum capacitance of the circuit?(b) Would It be difficult in practice to limit the capacitance to less than the value found in (a)?Consider a circuit that consists of a real battery with an emf and an internal resistance of r connected to a variable resistor R. (a) In order for the terminal voltage of the battery to be equal to the emf of the battery, what should the resistance of the variable resistor be adjusted to? (b) In older to get the maximum current from the battery, what should the resistance variable resistor be adjusted to? (c) In order for the maximum power output of the battery to be reached, what should the resistance of the variable resistor be set to?
- In the schematic below two batteries are in series and drive current through the circuit as shown. The first resistor has a voltage drop AV = 2.8 V, the middle resistor has a resistance of R = 154 Q, and the last resistor has a voltage drop AV2 = 1.6 V. Given these parameters, what is the magnitude of current flowing through the circuit in milli-amps (mA)? Giver your answer to 3 significant figures. %3D AV, 3.0 V 4.5 V wwA large capacitor of 1000 µF is charged by a steady current of 1 mA until it reaches a voltage of 100 V. At that voltage, the charging circuit is disconnected. a) Calculate how long the charging takes.A capacitor C = 5 µF, resistor R = 140 Q and a voltmeter are connected to a battery of Emf = 15 V as shown in the figure below. If the voltmeter is disconnected, what is the potential difference across the capacitor? R a C Fint Emf The potential difference, V, = Units Select an answer v. Then the voltmeter is connected to points a and b and used to measure the potential difference across the capacitor. What does the voltmeter read if its internal resistance is rint = 1 kN? The voltmeter readings, V2 = Units Select an answer v How can the accuracy of voltmeter be increased? What internal resistance would provide more accurate measurements? Please write your answer in the box below. pe here to search 3. 5 E K
- In the schematic below two batteries are in series and drive current through the circuit as shown. The first resistor has a voltage drop AV₁ = 1.2 V, the middle resistor has a resistance of R = 64, and the last resistor has a voltage drop AV₂ = 1 V. Given these parameters, what is the magnitude of current flowing through the circuit in milli-amps (mA)? Giver your answer to 3 significant figures. AV, ww 3.0 V 4.5 V ww ΔV, ww Rmam/sir how do u draw an electrical circuit, with a voltometer and a anmeter.The variable resistor Ro in the circuit is adjusted until the power dissipated in Ro is 40 W. Find the values of Ro that satisfy this condition. V,=60 V and R,=7,5 0, R2=30 0, R3=3 0, R4=6 0 and V=9iy. R, R3 R4 Vs R R. V. Lütfen birini seçin: O a. 1,50 and 3,90 O b. 0,55 and 4,50 Oc. 1,80 and 7,50 O d. 0,70 and 4,10 e. 0,31 and 2,40 * Of. 0,40 and 3,60 g. 1,80 and 7,20