EXPERIMENT NO-1 AIM- To determine the frequency of A. C. mains by using an electric vibrator. APPARATUS- Electric vibrator‚ table lamp‚ pulley‚ weight box‚ fishing cord‚ a. c. source. THEORY- when a cord of mass per unit length m is connected to the vibrating rod of the vibrator and stretched with a tension T‚ the cord vibrators in segments. If the length of the cord is then adjusted until the nodes are clearly marked‚ the frequency of the stretched string is the same as of the vibrating rod which
Premium
both in SPICE and physical implementation. The results need to be reported from both the SPICE and physical measurements. 1 Current voltage characteristics of diodes 1. Design a circuit to measure the forward-bias current voltage characteristics of diode as shown in Fig 3 using Circuitlab. Figure 1: A SPICE circuit for plotting current voltage characteristics of diodes. 2. Obtain the characteristics of D1N4148 by SPICE simulation. 3.1. Simulate the power diode using
Premium
Abhishek Akkeneni 902667190 INTRODUCTION – WHAT ARE OPERATIONAL AMPLIFIERS? An operational amplifier ("op-amp") is a DC-coupled high-gain electronic voltage amplifier with a differential input and‚ usually‚ a single-ended output. An op-amp produces an output voltage that is typically hundreds of thousands of times larger than the voltage difference between its input terminals.[1] Op-amps are among the most widely used electronic devices today‚ being used in a vast array of consumer‚ industrial
Premium Amplifier
channels? Voltage gated channels 2. a. Where is the density of voltage-gated Na+ channels the greatest? Axon hillock b. What areas of the neuron generate signals that open these voltage-gated channels? Dendrites and the cell body c. Opening of these channels causes the membrane to depolarize. (voltage change). 3. a. If the membrane reaches the trigger point‚ known as Threshold‚ what electrical potential will be generated? Action potential. b. During the depolarization phase‚ voltage-gated
Premium Action potential Neuron
varying magnetic flux through the secondary winding. This varying magnetic flux induces a varying electromotive force (EMF)‚ or "voltage"‚ in the secondary winding In electrical engineering‚ two conductors are referred to as mutual-inductively coupled or magnetically coupled [1] when they are configured such that change in current flow through one wire induces a voltage across the ends of the other wire through electromagnetic induction. The amount of inductive coupling between two conductors is measured
Premium Transformer Alternating current
A SUMMER TRAINING REPORT ON OPERATION AND MAINTANANCE OF SUBSTATION UPCL BY SMITA DOBHAL - (07090105048) Submitted to the Department of Electrical Engineering In partial fulfillment of requirements for the award of Degree of Bachelor of Technology In Electrical Engineering Department of Electrical Engineering GOVIND BALLABH PANT ENGINEERING COLLEGE UTTARAKHAND TECHNICAL UNIVERSITY GHURDAURI‚PAURI GARHWAL UTTARAKHAND
Premium Transformer
THE WAR OF CURRENTS Tesla vs Edison: THE WAR OF CURRENTS In the "War of Currents" era (sometimes "War of the Currents" or "Battle of Currents") in the late 1880s‚ George Westinghouse and Thomas Edison became adversaries due to Edison’s promotion of direct current (DC) for electric power distribution over alternating current (AC) advocated by Westinghouse and Nikola Tesla. Thomas Edison American inventor andbusinessman was known as "The Wizard of Menlo Park" and pushed
Premium Alternating current Nikola Tesla Transformer
experiment. Some of the most common devices and meters to be used is described below. 1) RESISTORS Resistors are devices used to give a desired value of resistance. They are inserted into a circuit in order to lower the current of to produce a desired voltage drop. There are two kinds of resistors: a) the Fix Resistor and‚ b) the Variable Resistor. The fix resistor has a specific value of resistance which cannot be changed‚ while the variable resistor may have a any value of resistance within a specified
Premium Electricity Electric current Direct current
leakage‚ Transformer with resistance and reactance‚ Equivalent resistance and reactance‚ Equivalent circuit‚ Open circuit ‚ Short circuit test‚ Separation of core losses‚ Total approximate voltage drop of a transformer‚ Exact voltage drop‚ Per unit resistance‚ Leakage reactance and impedance voltage drop‚ Voltage regulation of a transformer‚ Losses in a transformer‚ Efficiency of a transformer‚ Condition for maximum efficiency‚ All day efficiency‚ Polarity test of a singlephase transformer‚ Sumpner’s
Premium Transformer
LDR will be very less. Here 555 timer IC is configured as a monostable multivibrator. The LDR will trigger the 555 timer. The output of the 555 timer IC is directly fed to the baser of the transistor. This gives low signal and it turns ON the coil voltage of the relay. Street lights were connected to relay. Block diagram: Components used: R1-560E R2-10K LDR 555 Timer IC 7809 regulator IC VR1-10K D1-D2- 1N4001 D3-4148 LED -5mm red colour Q1 – BC 547 Relay -6v DC C1-2200uf 25v C2- 220uf 25v C3-100uf
Premium Transistor Resistor Bipolar junction transistor