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BSNL JTO Question Paper 2 2014
... –40dB b) –6dB c) –55dB d) –60dB 26. 29. When the network has 10 nodes and 17 branches then the number of different node pair voltages would be a) 7 b) 9 c) 10 d) 45 27. 30. The circuit shown in the following fig. will act as an ideal current source with respect to terminals A and B when frequency is ...
... –40dB b) –6dB c) –55dB d) –60dB 26. 29. When the network has 10 nodes and 17 branches then the number of different node pair voltages would be a) 7 b) 9 c) 10 d) 45 27. 30. The circuit shown in the following fig. will act as an ideal current source with respect to terminals A and B when frequency is ...
output will oscillate between values of approximately +10 volts and
... LABORATORY 7 Op Amp Clock Circuit In this lab we will understand and build an “astable multivibrator” or clock circuit using a 741 op amp. The circuit output will be a square wave, and the period of the square wave can be adjusted by changing the resistor and capacitor values in the circuit. We will ...
... LABORATORY 7 Op Amp Clock Circuit In this lab we will understand and build an “astable multivibrator” or clock circuit using a 741 op amp. The circuit output will be a square wave, and the period of the square wave can be adjusted by changing the resistor and capacitor values in the circuit. We will ...
Document
... series circuit has a time constant of 600 μs, and the maximum current is 300 mA. What’s the value of the inductance? 3. Calculate the resistance in an RL circuit in which L = 2.50 H and the current increases to 90.0% of its final value in 3.00 s. 4. How much energy is stored in a 70 mH inductor at a ...
... series circuit has a time constant of 600 μs, and the maximum current is 300 mA. What’s the value of the inductance? 3. Calculate the resistance in an RL circuit in which L = 2.50 H and the current increases to 90.0% of its final value in 3.00 s. 4. How much energy is stored in a 70 mH inductor at a ...
Chapter 36. AC Circuits
... Where VC is the maximum voltage across the capacitor, also equal to the maximum emf. The instantaneous current in the circuit is ...
... Where VC is the maximum voltage across the capacitor, also equal to the maximum emf. The instantaneous current in the circuit is ...
MS Word - Sonoma State University
... Problem 1 Wavelengths in Radio Applications (15 points) Radio waves propagate in free space (and in our atmosphere) at the speed of electromagnetic waves (e.g., light waves) – an EM wave velocity of v = 2.99792 108 meters per second. For this problem use v = 3.00 108 meters per second (m/sec). A ...
... Problem 1 Wavelengths in Radio Applications (15 points) Radio waves propagate in free space (and in our atmosphere) at the speed of electromagnetic waves (e.g., light waves) – an EM wave velocity of v = 2.99792 108 meters per second. For this problem use v = 3.00 108 meters per second (m/sec). A ...
9001 Series Over Current Detector Circuit Examples
... Current shunt sensing is used in many existing power electronic circuits. This method passes the sensed current through a resistor. The voltage across the resistor is then compared to a reference in a comparator or op amp to determine if the current has exceeded a safe threshold. The primary advanta ...
... Current shunt sensing is used in many existing power electronic circuits. This method passes the sensed current through a resistor. The voltage across the resistor is then compared to a reference in a comparator or op amp to determine if the current has exceeded a safe threshold. The primary advanta ...
35. An electric current passing through a wire will produce
... 19. If you purchase amateur radio equipment from outside the country, what is the right thing to do upon arrival at the custom’s control post? A. Bring in the said equipment without notifying Royal Brunei Custom and Excise official B. Declare the equipment to the Royal Brunei Custom and Excise offi ...
... 19. If you purchase amateur radio equipment from outside the country, what is the right thing to do upon arrival at the custom’s control post? A. Bring in the said equipment without notifying Royal Brunei Custom and Excise official B. Declare the equipment to the Royal Brunei Custom and Excise offi ...
Serway_PSE_quick_ch32
... inductance of the coil increases. As a result, more potential difference appears across the coil than before. Consequently, less potential difference appears across the bulb, so the bulb is dimmer. ...
... inductance of the coil increases. As a result, more potential difference appears across the coil than before. Consequently, less potential difference appears across the bulb, so the bulb is dimmer. ...
ppt - EC - Unit 6 - sine wave -1
... frequency can be varied by an applied voltage • This is achieved by “varicap”, whose capacitance varies with applied voltage. • Varicap is used in tank circuit, which determines frequency ...
... frequency can be varied by an applied voltage • This is achieved by “varicap”, whose capacitance varies with applied voltage. • Varicap is used in tank circuit, which determines frequency ...
Crystal radio
A crystal radio receiver, also called a crystal set or cat's whisker receiver, is a very simple radio receiver, popular in the early days of radio. It needs no other power source but that received solely from the power of radio waves received by a wire antenna. It gets its name from its most important component, known as a crystal detector, originally made from a piece of crystalline mineral such as galena. This component is now called a diode.Crystal radios are the simplest type of radio receiver and can be made with a few inexpensive parts, such as a wire for an antenna, a coil of copper wire for adjustment, a capacitor, a crystal detector, and earphones. They are distinct from ordinary radios as they are passive receivers, while other radios use a separate source of electric power such as a battery or the mains power to amplify the weak radio signal so as to make it louder. Thus, crystal sets produce rather weak sound and must be listened to with sensitive earphones, and can only receive stations within a limited range.The rectifying property of crystals was discovered in 1874 by Karl Ferdinand Braun, and crystal detectors were developed and applied to radio receivers in 1904 by Jagadish Chandra Bose, G. W. Pickard and others.Crystal radios were the first widely used type of radio receiver, and the main type used during the wireless telegraphy era. Sold and homemade by the millions, the inexpensive and reliable crystal radio was a major driving force in the introduction of radio to the public, contributing to the development of radio as an entertainment medium around 1920.After about 1920, crystal sets were superseded by the first amplifying receivers, which used vacuum tubes (Audions), and became obsolete for commercial use. They, however, continued to be built by hobbyists, youth groups, and the Boy Scouts as a way of learning about the technology of radio. Today they are still sold as educational devices, and there are groups of enthusiasts devoted to their construction who hold competitions comparing the performance of their home-built designs.Crystal radios receive amplitude modulated (AM) signals, and can be designed to receive almost any radio frequency band, but most receive the AM broadcast band. A few receive shortwave bands, but strong signals are required. The first crystal sets received wireless telegraphy signals broadcast by spark-gap transmitters at frequencies as low as 20 kHz.