Q1/ What is the maximum current that can flow in the circuit shown below when taking into account the maximum error states of the resistors whose error ratio is (R2 10 %, R1 5% ,R3 5% ) ? R1 R2 R3 2kQ 5.6kO 2.2kO V1 =12V
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- The potential difference across the filament of a light-bulb is maintained at a constant value while equilibrium temperature is being reached. The steady-state current in the bulb is only one-tenth of the current drawn by the bulb when it is first turned on. If the temperature coefficient of resistivity for the bulb at 20.0C is 0.004 50 (C)-1 and the resistance increases linearly with increasing temperature, what is the final operating temperature of the filament?Ralph has three resistors, R1, R2, and R3, connected in series. When connected to an ideal emf source E1, current I1 flows through the resistors. a. If the resistors are instead connected to a second source with E2=2E1, what is the new current through the resistors in terms of the first current? b. Show that, if each resistance is doubled and the resistors are connected in series to the second emf source, the current through the resistors is equal to I1.Resistors are commonly rated at 18W,14W,12W ,1 W and 2 W for use in electrical circuits. If a current of1 = 2.00 A is accidentally passed through a R=1.00 resistor rated at 1 W, what would be the most probable outcome? Is there anything that can be done to prevent such an accident?
- The 100-bulb strand of incandescent Christmas lights is rated at 40.8W of power. When stacked, two strands consume twice the power (81.6W =2 x 40.8W) and act as two resistors in parallel to a 120V source. If the 120V source is safe guarded by a 15A circuit breaker, and the 15A circuit breaker will actually "trip" (open up) at 80% its rating (which is often the case in the real world!), how many strands can be run at the same time without tripping the circuit breaker? If you use 100-bulb strands of LED Christmas lights instead, how many strands can you run at the same time? Assume LEDs run at 1/10th the power of incandescent bulbs.The instantaneous current (I) at time t is given by equation I = (10 + 5) e ^ -t / CRwhen the capacitor is being charged. Capacitance (C)is 7x10 ^ -6 farad and the resistance (R) is 0.3x10 ^ -6ohm Determine ita. Instantaneous current at t = 2.5 secondsb. the time for the instantaneous current drops to 5 amperes.To get the minimum current, the connection should be in series. If you create a series connection with 30V DC source and three resistors with R1 = 50Ω, R2 = 75Ω, and R3 = 100Ω, how do you calculate for the total current (IT) and the current flowing in each resistor (I1, I2, I3), and the total voltage (VT) and the voltage across each resistor (V1, V2, V3)? How do you also determine the power dissipated by each resistor (P1, P2, P3) and by the whole circuit (PT)??
- The equations of the currents in two parallel-connected electric devices are i1 = 11.3 sin (377t + /4) and i2 = 8.5 sin (377t - /4). What is the rms value of the resultant current?In the Wheatstone bridge experiment shown in the figure the values of the resistors are R1=3.3 kΩ, R2=1.1 kΩ, R3=6.6 kΩ . a) Calculate the value of resistor Rx when the current in the ampere-meter is zero. b) Interchanging the locations of which of two resistors does not change the value of Rx? Write it down with the reason. c) What is the role of the resistor with a resistance of 2.2 kΩ connected in series with ammeter? Is it possible to execute the experiment without this resistor?A capacitor has a potential difference of V0 = 375 V between the plates. When the switch S is closed, it is discharged through a resistor of R = 14.5 kΩ. At time t = 10 seconds after the switch is closed, the potential difference between the capacitor plates equals VC = 1.0 V. a. Calculate the capacitance of the capacitor in farads. b. Calculate the maximum current Imax that passes through the resistor, in Amperes. c. Calculate the current I at time t, in Amperes.
- A student performs a lab where the voltagedrop across a resistor is measured as a functionof current. Plot a graph from the values givenin the following table, and determine theresistance of the circuit. Current, I (mA) Potential Difference, Current, I (mA)V (V)0.00 0.00200 9.00400 16.0600 24.0800 31.01000 40.0Q2. To determine the galvanometer's internal resistor R. and its maximum electric current Is, corresponding to a maximum deviation of its needle, we mount it in series with a rheostat, as shown in the adjacent figure. R a b son Reosta Galvanometre When the needle makes a maximum deviation Vab = V1 = 5 V and Rr= R1 = 80 k 2. When the needle makes 1/2 maximum deviation Vab = V2 = 2 V and Rp = R2 = 60 ko. When the needle makes 44 maximum deviation Vab = V3 = 2 V and Rr = R3 . V a) Write the relationship between V1, R1, Rc and le. b) Write the relationship between V2, R2, Re and Ic. c) Write the relationship between V3, R3, Re and Ic. d) Determine the values of Re and Ic. e) Determine the value of Rs. Answer:the voltage across a 3.71uf capacitor in a tv circuit is 4.54 mV. Find the voltage after 0.563ms if a current is given below (in uA) further changes the capacitor. i= (1+6t)^(1/3) The voltage at t = 0.563 ms is _________ mV. I have no clue on the steps to solve such a problem help would be greatly appreciated