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- The voltage V (volts), current I (amperes), andresistance R (ohms) of an electric circuitare related by the equation V = IR. Suppose that V is increasing atthe rate of 1 volt/sec while I is decreasing at the rate of 1/3 amp/sec. Let t denote time in seconds. What equation relates dR/dt to dV/dt and dI/dt?The voltage V (volts), current I (amperes), andresistance R (ohms) of an electric circuitare related by the equation V = IR. Suppose that V is increasing atthe rate of 1 volt/sec while I is decreasing at the rate of 1/3 amp/sec. Let t denote time in seconds. What is the value of dI/dt?1. 9. In the circuit shown in the figure above, a power supplier of 50 V is connectedacross a resistance network. If R1 = 20 Ω, R2 = 10 Ω, R3 = 10 Ω, and R4 = 40 Ω. Whatis the equivalent resistor of the circuit? 2. 10. What is the current flowing through the R4 resistor in the circuit shown in Problem 9? 3. 11. What is the voltage across the R1 resistor in the circuit shown in Problem 9? 3.
- 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 ?The output power of a solar PV module is 120 Watts. The number of cells in the moduleis 39. Estimate the following: (Assume any other necessary data)i. Output voltage of the PV moduleii. Output current of the PV moduleiii. Total area of PV moduleiv. Area of one PV cellv. Power output of one PV cellElectric PowerDirections: Answer the following problem, write your answer with complete solution. A 1000 W television was used to watch BTS concert for1 hour and 30 minutes. Howmuch energy is used if the electricity at home is 340 volts? What is the current inthe television?
- What is the maximum voltage that can be applied to a 14-ko resistor rated at W? Hint The maximum voltage that shoud be applied (to avoid burning out the resistor) is V.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= 2 V, the middle resistor has a resistance of R = 69 Q, and the last resistor has a voltage drop AV2 = 1.1 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. 3.0 V 4.5 V AV.Solve the following: in light bulb has a resistance of 150 when lighted. How much current will flow through it when connected acro 220 V, its normal operating voltage? Draw the circuit schematic diseam>Fin 2. Find the potential difference (Em) Polisher connected wi 3. A 12 battery operates a 15 ohms digital scale for 5.2 minutes. a) Find the current flowing b) the charges erred with the given time. 4. What is the resistance of a conductor at 50° C if its resistance at 0°C is 1 ohm and the temperature coefficient of resistance of 9.8 x 10-³/°C 6. Complete the table: 5. A silver wire has a resistance of 2.3 at 0°C and a temperature coefficient of resistance of 3.75 x 10-³/°C. What is final temperature when the final resistance is 3.8 ohms. ? V, Volts Electric Circuit and Ohm's Law 8 volts 20 volts ca elecun it with current flowing at 18 ampere and a floor rice of 12 Q? 10 Volts 36 volts I, Ampere 2.8 mA 40A 130mA R, ohms 156 02 25 ΚΩ 450 ΚΩ
- mobile battery during a charge cycle are shown in 1.26 The voltage and current at the terminals of an auto- Fig. P1.26. a) Calculate the total charge transferred to the battery. b) Calculate the total energy transferred to the battery. Figure P1.26 v (V) bnohostib 24 Loiwollol sd lo 16 8- 8. 12 16 20 t (ks) i (A) maxi 24 16 8- the che 4 8. 12 16 20 t (ks)4. a. Determine the equivalent resistance of the "ladder" of equal 175 Q resistors shown here. In other words, what resistance would an ohmmeter read if connected between points A and B? R R R R. R R R R Bon RAB = b. What is the current through a 50.0 V battery connected between points A and B?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.