You have probably experienced the lights of a car dimming when the car is started, or...
You have probably experienced the lights of a car dimming when the car is started, or lights in the living room dimming when the AC kicks in. The following resistance configuration explains that phenomenon. First, consider a 12 V voltage source with internal resistance of 1 Ω. We connect the source to a 100 Ω load, i. e. the car’s lights.
a) calculate the voltage applied to the lights.
b) we add a 1 Ω load in parallel to the lights, i. e. the starter motor. Now, calculate the voltage applied to the lights.
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You have probably experienced the lights of a car dimming when
the car is started, or...
It is known that when a heavy appliance comes on, lights that are connected to the...
It is known that when a heavy appliance comes on, lights that are connected to the same circuit will dim. Consider the case of a motor in a refrigerator that is in parallel to a bulb. a) Given the voltage source is 120 V, the wire resistance is 0.400 Ω, and the bulb is nominally 75.0 W, what power will the bulb dissipate if a total of 30.0 A passes through the wires when the motor comes on? Assume negligible...
Derive equations 1 and 2, thank you! When you have a RC series circuit in an...
Derive equations 1 and 2, thank you!
When you have a RC series circuit in an AC source of angular frequency ω (ω = 2πf), you can calculate the capacitance (C) from the equation: max, where VmarR is the amplitude of the voltage across the resistor and Vmax.c is the amplitude of the voltage across the capacitor. [You have to derive this equation in your report.] Similarly, when you have a RL series circuit in an AC source of angular...
When you ask why they are late with their share of the rent (again), your roommate...
When you ask why they are late with their share of the rent (again), your roommate explains that they would like to invest the money into buying inexpensive force sensors for about $10 each. They think they can use these to make cheap electronic drum kits and sell them at a profit. The idea is to connect a force sensor acting as a switch between a 9 V battery and an old 50 Ω (load resistance) speaker. Each customer will...
1. (50 Points) angle phase voltage source supplies an RL load connected in parallel configuration throu...
1. (50 Points) angle phase voltage source supplies an RL load connected in parallel configuration throu given below: Load: R 500 and X j50 Ω. The voltage across the load is 20 kV. wire impedance : 2.5 +j20 Ω. Answer the following questions: (a) Represent the circuit in phasor domain. (b) Calculate the phasor current through the wire. (c) Calculate the voltage across the source. (d) Calculate the phasor current through the load resistance. (e) Calculate the complex power supplied...
Suppose a poll of adults asked, "Have you ever driven a car when you probably had...
Suppose a poll of adults asked, "Have you ever driven a car when you probably had too much alcohol to drive safely?" of the 300 men who answered, 186 (62%) said yes and 111 (37%) said no. The remaining three weren't sure. Of the 300 women, 84 (28%) said yes while 213 (71%) said no, and the remaining three weren't sure. (You may need to use a calculator. Round your answers to two decimal places.) (a) Ignoring those who said...
b) A 1MW, 3300 V, 50 Hz, wye-connected, 3-ф, twenty four-pole, synchronous motor has a synchronous...
b) A 1MW, 3300 V, 50 Hz, wye-connected, 3-ф, twenty four-pole, synchronous motor has a synchronous reactance of 3.24 2 per phase. Assume armature resistance is negligible. This machine is connected to an infinite bus-bars at 3300 V. Its field excitation is adjusted to provide P.F-1 at rated load Calculate: 0 the internal generated voltage EA and armature current la at rated conditions (S marks) ii) the maximum power and torqu e that the motor can deliver with its Ir...
2. A string of lights is wired in a series circuit. When one light bulb ns...
2. A string of lights is wired in a series circuit. When one light bulb ns out, A B the other bulbs will dim. none of the other bulbs will be lit. C D e burnt out bulb becomes a fire hazard. all of the other bulbs will be lit. 2. A string of lights is wired in a series circuit. When one light bulb ns out, A B the other bulbs will dim. none of the other bulbs will...
Q1b) DC Machines [ 6 marks ] You are given a 24 V DC motor. When...
Q1b) DC Machines [ 6 marks ] You are given a 24 V DC motor. When you connect it to a 24 V supply, under no-load conditions it spins at 2,000 rpm. With the same 24 V supply, when the motor is stalled, the input current is 50 A. i) Calculate the back-emf constant and hence the stall torque of the motor. Find also the armature resistance. [3 marks ] ii) The DC motor has a rated input current of...
only write a conclusion/lesson learnt based off the experiment (iry After performing this experiment, you will...
only write a conclusion/lesson learnt based off the
experiment
(iry After performing this experiment, you will be able to: I. Change a linear network containing several resistors into an nt Thevenin circuit. circuit by comparing the 2. Prove the equivalency of the network in objective 1 with the effects of various load resistors. Materials Needed: Resistors: One 150 Ω, one 270 Ω, one 470 Ω, one 560 Ω, one 680 Ω, one 820 Ω One 1 k2 potentiometer Summary of...
In order to achieve less environmental pollution there is a tendency of using electric vehicles now....
In order to achieve less environmental pollution there is a tendency of using electric vehicles now. There are three major units in an an electric car as shown in the following block diagram. Battery Unit Control Unit Motor/ Generator The battery unit consists of a low voltage (12 V) battery and a high voltage (about 200 V) battery. 12 V battery is used to supply power for horn, lamps, wipers etc. High voltage battery drives the electric motor which then...
Derive equations 1 and 2, thank you!
When you have a RC series circuit in an AC source of angular frequency ω (ω = 2πf), you can calculate the capacitance (C) from the equation: max, where VmarR is the amplitude of the voltage across the resistor and Vmax.c is the amplitude of the voltage across the capacitor. [You have to derive this equation in your report.] Similarly, when you have a RL series circuit in an AC source of angular...
1. (50 Points) angle phase voltage source supplies an RL load connected in parallel configuration throu given below: Load: R 500 and X j50 Ω. The voltage across the load is 20 kV. wire impedance : 2.5 +j20 Ω. Answer the following questions: (a) Represent the circuit in phasor domain. (b) Calculate the phasor current through the wire. (c) Calculate the voltage across the source. (d) Calculate the phasor current through the load resistance. (e) Calculate the complex power supplied...
Suppose a poll of adults asked, "Have you ever driven a car when you probably had too much alcohol to drive safely?" of the 300 men who answered, 186 (62%) said yes and 111 (37%) said no. The remaining three weren't sure. Of the 300 women, 84 (28%) said yes while 213 (71%) said no, and the remaining three weren't sure. (You may need to use a calculator. Round your answers to two decimal places.) (a) Ignoring those who said...
b) A 1MW, 3300 V, 50 Hz, wye-connected, 3-ф, twenty four-pole, synchronous motor has a synchronous reactance of 3.24 2 per phase. Assume armature resistance is negligible. This machine is connected to an infinite bus-bars at 3300 V. Its field excitation is adjusted to provide P.F-1 at rated load Calculate: 0 the internal generated voltage EA and armature current la at rated conditions (S marks) ii) the maximum power and torqu e that the motor can deliver with its Ir...
2. A string of lights is wired in a series circuit. When one light bulb ns out, A B the other bulbs will dim. none of the other bulbs will be lit. C D e burnt out bulb becomes a fire hazard. all of the other bulbs will be lit. 2. A string of lights is wired in a series circuit. When one light bulb ns out, A B the other bulbs will dim. none of the other bulbs will...
Q1b) DC Machines [ 6 marks ] You are given a 24 V DC motor. When you connect it to a 24 V supply, under no-load conditions it spins at 2,000 rpm. With the same 24 V supply, when the motor is stalled, the input current is 50 A. i) Calculate the back-emf constant and hence the stall torque of the motor. Find also the armature resistance. [3 marks ] ii) The DC motor has a rated input current of...
only write a conclusion/lesson learnt based off the
experiment
(iry After performing this experiment, you will be able to: I. Change a linear network containing several resistors into an nt Thevenin circuit. circuit by comparing the 2. Prove the equivalency of the network in objective 1 with the effects of various load resistors. Materials Needed: Resistors: One 150 Ω, one 270 Ω, one 470 Ω, one 560 Ω, one 680 Ω, one 820 Ω One 1 k2 potentiometer Summary of...
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