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___.
A 120 – volt AC voltage is applied across a 20 – ohm resistive load. Find values of current, max voltage, peak–to–peak voltage, average voltage, maximum current, peak–to–peak current, average current, and power. draw the circuit diagram
What is CEMF?
A-How temperature affects the conductivity of conductive metals and how it affects semiconductors.semiconductors B-What is superconductivity, how does it relate to temperature? Some examples of superconductors.superconductors.
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.
Explain, what is the potential barrier in semiconductors. Note: no need to give an exact definition, please explain it in an easy way.
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.
Lightning and thunder and is a case of large scare electrostatic discharge and can create visible sparks that can damage electronic devices. Discuss how diodes are used to protect the electronics devices from electrostatic discharge or even against lightning.
3. Explain few applications of Zener diodes and LEDS.

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