When a current carrying conductor is placed in a magnetic field‚ it experiences a force and tends to move in the direction as per Fleming’s left hand rule. Fleming left hand rule: If the first and the second finger and the thumb of the left hand are held so that they are at right angle to each other‚ then the thumb shows the direction of the force on the conductor‚ the first finger points towards the direction of the magnetic field and the second finger shows the direction of the current in the
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Unit 36: Building Electrical Maintenance Delivery Pack Unit Type Optional EAL Code ETA/036 Level Advanced Notional Learning Hours 75 Description of Unit This unit will enable the candidate to acquire essential knowledge and understanding to carry out necessary electrical maintenance of building systems. Summary of Learning Outcomes To achieve this unit‚ candidates must: 36.1 Demonstrate Knowledge and Understanding of Building Electrical Supply and Maintenance
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CURRENT PROTECTION FUNCTIONS ANSI 50/51 – Phase over-current ANSI 50N/51N or 50G/51G – Earth fault or sensitive earth fault ANSI 50BF – Breaker failure ANSI 46 -Negative sequence / unbalance ANSI 49RMS – Thermal overload CURRENT PROTECTION FUNCTIONS ANSI 50/51 – PHASE OVERCURRENT Three-phase protection against overloads and phase-to-phase short-circuits. ANSI 50N/51N OR 50G/51G – EARTH FAULT Earth fault protection based on measured or calculated residual current values: ANSI 50N/51N:
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UNISONIC TECHNOLOGIES CO.‚ LTD S8050 LOW VOLTAGE HIGH CURRENT SMALL SIGNAL NPN TRANSISTOR DESCRIPTION The UTC S8050 is a low voltage high current small signal NPN transistor‚ designed for Class B push-pull audio amplifier and general purpose applications. 1 NPN SILICON TRANSISTOR FEATURES * Collector current up to 700mA * Collector-Emitter voltage up to 20 V * Complementary to S8550 Lead-free: S8050L Halogen-free: S8050G TO-92 ORDERING INFORMATION Normal S8050-xx-T92-B S8050-xx-T92-K
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Engineering Circuit Analysis‚ 7th Edition Chapter Two Solutions 10 March 2006 1. (a) 12 μs (b) 750 mJ (c) 1.13 kΩ (d) 3.5 Gbits (e) 6.5 nm (f) 13.56 MHz (g) 39 pA (h) 49 kΩ (i) 11.73 pA PROPRIETARY MATERIAL. © 2007 The McGraw-Hill Companies‚ Inc. Limited distribution permitted only to teachers and educators for course preparation. If you are a student using this Manual‚ you are using it without permission. Engineering Circuit Analysis‚ 7th Edition Chapter Two Solutions
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figure shows. In the experiment‚ we want to calculate the resonance frequency. We know the current will be maximum when the circuit is driven at its resonance frequency. In addition‚ the amplitude I0 of the AC current in a series LRC circuit depends on the amplitude V0 of the applied voltage and the impedance Z‚ which is a measure of the overall opposition of a circuit to the flow of an electrical current as ‚ So we just need to use the apparatus to measure the maximum voltage. As we know‚ at the
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Introduction My research is based on how Ohm’s law is derived and how it is used to solve problems in series and parallel connection and the resistance of a material. Ohm’s Law shows the relationship between the voltage (V)‚ current (I) and resistance (R). It can be written in three ways: V = I × R or I =V/R or R = V/I The resistance (R) of a material depends on Its length‚ cross-sectional area‚ The resistivity‚ and Resistance also depends on temperature‚ usually
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rivalry died out after Westinghouse managed to make his company the main power supplier for the Exposition (Ghose 1). Because of this accomplishment and Tesla’s new inventions‚ Tesla and Westinghouse are considered the unofficial winners of the War of Currents in scientists’ minds (Nix 4). Nevertheless‚ the public could not care less about the winner and focused on the new effects of Tesla’s creations. At the time‚ the 1890s saw a great change in the way electricity worked. America saw a massive growth
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Permissions Department‚ Pearson Education‚ Inc.‚ Upper Saddle River‚ NJ 07458. Chapter 2 Solutions Section 2.1 Introduction 2.1 Current source 2.2 Voltage source 2.3 Resistor 2.4 Capacitor 2.5 Inductor Section 2.2 Charge and Current 2.6 b) The current direction is designated as the direction of the movement of positive charges. 2.7 The relationship of charge and current is t q(t ) = ! i(t ) + q(t 0 ) dt t0 so t q(t ) = ! 2 sin ( " t ) + q(t0 ) 10 dt t0 & ’2 # q(t )= $ cos( ( t )!
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locations—power flow analysis allows one to determine other quantities. The most important of these quantities are the voltages at locations throughout the transmission system‚ which‚ for alternating current (a.c.)‚ consist of both a magnitude and a time element or phase angle. Once the voltages are known‚ the currents flowing through every transmission link can be easily calculated. Thus the name power flow or load flow‚ as it is often called in the industry: given the amount of power delivered and where
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