1.As shown below, an LED lightbulb is connected to the grid power. The LEDlightbulb has a rated power of 15 W, and the gird voltage is 120 V 60 Hz. Based on the aboveinformation(1) what is the peak value and effective value of the current flowing through the LED light bulb,(2) write an expression of the current flowing through the LED light bulb.

Answered: Image /qna-images/answer/dffe6831-6872-4418-acbe-b605ba6e3465.jpg

Answered: 1. As shown below, an LED lightbulb is…

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter30: Dc Motors

Section: Chapter Questions

Problem 6RQ: What is CEMF?

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2. In the previous diagram for an LED circuit, the power supply is a 9V battery and we are using a Red LED whose voltage drop is 2V. The specification sheet for the LED recommends that the "ON" current should be 10 milliamps. a. What series resistor will give the specified LED current? 7737-1 C. b. What is the power dissipated by the resistor you selected in part a? A 70 2 What is the power dissipated in the LED?
Two silicon diodes are connected in parallel and in series with resistor 0.33kohms and a battery of 10V. the voltage across the resistor 0.33k ohms is ___. The current flowing through resistor 0.33K ohms is approximately equal to___. The current of one diode is___.
What reading would be displayed by an digital multimetre if it were switched to an AC voltage range and connected to a symmetrical square waveform of 8.3 V peak?
A series circuit consisting of a 50 – ohm resistor, 0.5 – henry inductor, and a 100 – microfarad capacitor is connected to a 110 – volt, 50 cycle source. Calculate the following: a.) TOTAL IMPEDANCE b.) CURRENT c.) VOLTAGE DROP ACROSS THE RESISTOR d.) VOLTAGE DROP ACROSS THE INDUCTOR e.) VOLTAGE DROP ACROSS THE CAPACITOR f.) AVERAGE POWER g.) APPARENT POWER h.) REACTIVE POWER i.) POWER FACTOR j.) POWER FACTOR ANGLE DRAW THE PHASOR DIAGRAM IF POSSIBLE AND ROUND OFF TO FOUR DECIMAL PLACES
What is CEMF?
The purpose of the current limiting resistor in a Zener diode circuit is to _________. a. Maintain a constant current through the load resistor b. Maintain a constant voltage across the Zener diode c. Maintain a constant current through the Zener diode d. Drop the additional voltage from the power supply in order to maintain a constant voltage across the Zener diode Please answer it clearly.
In the circuit of the following figure, the input voltage Vs is 15 volts rms with a frequency of 60 Hz, R equals 150 Ohms and C equals 100,000 Pico Farads. The diodes are Germanium (Vd = 0.2 volts) and the Zener diode is 12 volts. a) The magnitude of the ripple voltage at Cb) The Magnitude of the Peak Inverse Voltage (PIV) for D1 and D2.
(b) Measure (using the DVM and oscilloscope) the voltage drop Vc across the capacitor and explain the operation of the circuit. the voltage drop Vc across the capacitor is 4.61V please explain question b
A single-phase full-wave rectifier is connected to an AC source with a peak voltage of 170 V and a frequency of 60 Hz. The load resistance is 502.
What are the main components that make up a photoresist? 2. What is a two-component resist? What are the two components? 3. What does the concept of dose involve? 4. What effect does the dose have on the molecular weight of a negativeresist? (Does it cause it to decrease or increase?) 5. Identify one problem that can arise when positive resist is applied to athermally grown oxide wafer (silicon substrate). How can this problembe resolved?
The power supply is a 9V battery and uses a Red LED whose voltage drop is 2V. The LED recommends that the "ON" current should be 10 milliamps. a. What series resistor will give the specified LED current? b. What is the power dissipated by the resistor you selected in part a? What is the power dissipated in the LED? C.
Design of a DC-DC Converter. The Circuit Below shows a basic Buck-Boost Converter with a highly inductive Load. With a Deliberate mistake in the configuration of the Circuit Connection. The Value of L1 is 22mH, C1 is 10uF, R1 is 220 and L2 is 10mH. The circuit operates with a switching frequency of 20KHZ. The Duty cycle of the Clock signal V2 is given by the function below: ( 17 ) х0.2 Duty Cycle, k = 0. 55 + 100 Your Unique Duty Cycle = %3D Buck-Boost Converter Q1 IRG4BC10U D1 R1 222 1N4009 C1 LV1 12V L1 22mH 10µF L2 10mH a) Find the mistake in the configuration of the circuit and correct the connection error.

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