PHINS FESISIRe Upang lema Upeldung Luncul. (LA 1.12) 4. AL-KO resistor used in a television receiver...
QUESTION 3 and the lifting speed As the resistance before the motor decreased the motor voltage QUESTION 4 Consider a circuit with a resistor in series with a motor, like observed in Activity 2 of the Week 10 Practical, when the load on the motor increases the voltage across the motor and the current through the motor Under this higher load the lifting speed and the motor torque QUESTION5 If the power supply is set to 5 V and a...
MULTISIM 10.65 The variable load resistor R¡ in the circuit shown in PSPICE Fig. P10.65 is adjusted for maximum average power transfer to RL a) Find the maximum average power. b) What percentage of the average power devel- oped by the ideal voltage source is delivered to Rź when R is absorbing maximum average power? c) Test your solution by showing that the power developed by the ideal voltage source equals the power dissipated in the circuit. Figure P10.65 1212...
I can not seem to get the right answers. Thank you! Given a 1/4 hp, separately excited, dc motor with the following parameters: K = 0.61, R, 15Ω, La-120mb. J = 0.005, and b = 0.0006. The armature voltage is controlled by a 120-V dc PWM source operating at 100 Hz 1. What is the armature current if the no-load speed is 1800 rpm when the armature supply is operated at a 100% duty cycle? 2. What is the no-load...
Please explain which components should be used. A simple AM radio receiver can be constructed as a by the differential equation series RLC circuit which can be modelled da R+ L Vext dt dt where L is the inductance, R is the restance, C is the capacitance, q is the resulting charge point in the circuit, and Vext is the voltage of the signal received in the circuit by an antenna When radio waves pass by the antennae, they create...
4. Three 100 Sresistors are connected, as shown in Figure 4. The maximum power that can safely be dissipated in any one resistor is 26.5 W. (a) What is the maximum voltage that can be applied to the terminals a and b? (b) For the voltage determined in part (a), what is the power dissipated in each resistor? (c) What is the total power dissipation? 5. A battery has an emf of 15.0 V. The terminal voltage of the battery...
1. A 15 hp, 4 pole, 208 V, 60 Hz, Y-connected, three-phase squirrel cage induction motor has the following parameters in Ω/phase referred to the stator: R,-0.220, Xi = 0.430, X,-15.0, R2 0.130 and X2-0.430. Mechanical and core losses amount to 300 W and 200 W respectively for rated voltage. (a) The motor is fed with a 60 Hz, 208 V voltage. It runs with a slip of 4.5 %. Find the speed, shaft torque and power, efficiency and power...
A Single-phase halfwave controlled rectifier is used for a heating system whose rated power is 15kW at 220V. The SCR is connected to a 220 VAC system. 1. Determine the rated equivalent resistance of the heater2. Determine the maximum that the rectifier can provide to the heater3. When the SCR is fired at angle of p/3, determinea. Waveform of the voltages across the load, the SCRb. Waveform of the currents flow through the SCR, drawn by the load and supplied...
4. Design a clamp circuit to clamp the negative extreme of a periodic input waveform of 10 sin(100πt)V to −5 V. Use 1 diode, 1 Zener diode, 1 resistor, and 1 capacitor of suitable values. Provide following minimum ratings of the selected components. (a) Diode - Maximum reverse voltage, peak forward current (b) Zener - Zener voltage, Zener current (c) Resistor - Resistance, power rating (d) capacitor - capacitance, Maximum voltage Assume a 0.6 V forward drop for all diodes...
Al. A 1 kVA single-phase step-down transformer is connected to a 220 V, 50 Hz A.C. source and delivers power to a load. The winding resistance and reactance at secondary side are 0.02 2 and 0.1 12 respectively. The maximum value of core flux is 0.248 mWb and the secondary winding contains 1000 turns. Evaluate a. b. the voltage induced on the secondary side; the turn ratio of primary side to secondary side; the rated current on both sides; and...
(4) A 2.5 KW electrical motor with 0.9 power factor and 75% efficiency, is supplied with single core general purpose PVC cable passing through thermally insulated wall and 20m length. The heater is protected via BS3036 fuse with ambient temperature of 25°C. The ratings of BS3036 are shown in Table 1. The maximum permissible voltage drop is 6% of the rated voltage of 240 V. BS3036 Current ratings (A) 5, 15, 20, 30, 45,60 Table 1 Find: a) The design...