# "Electric Current" Essays and Research Papers

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### Electric Current

constitute a current of 1 ampere. Ans.     Question 3 Name the instrument used to measure electric current in a circuit. Ans. Ammeter     Question 4 In the following table the values of current I flowing in a given resistor for the corresponding values of potential difference V across the resistor are shown : I(amperes) | 0.5 | 1.0 | 2.0 | 3.0 | 4.0 | V(Volts) | 1.6 | 3.4 | 6.7 | 10.2 | 13.2 | Plot a graph between V and I and use this graph to find the value of current when potential...

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### Electricity: Electric Current and New Resistance

AVOID THEM Phy X: ELECTRICITY 1. Topic Direction of flow of current. Common slips made Confusion between direction of flow of current and direction of movement of electrons Confusion in use of symbols- Is ampere written as A or amp. V=W/Q is often remembered wrongly. In questions where you have to check the resistance from the graph see what is plotted along the x and y axis. Reason why alloys are used to make elements of electric irons and heaters is not because they are insulators. 2. ...

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### Electric Current

Name _____________________ Battery, resistance, and current – Lab 17 Go to http://phet.colorado.edu/en/simulation/battery-resistor-circuit and click on Run Now. Batteries, Resistance and Current “Battery-Resistor”: Check “show battery” and “show cores”, watch what happens, adjust some variables 1. Why do electrons (blue dots) move? Draw a diagram of the battery, label the flow of electrons. The flow of current (+) is opposite; draw this and note if toward or away from + terminal...

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### Current Balance

﻿Current Balance PHY 114 10/29/2013 Abstract: The purpose of this experiment was to understand the current balance, current balance is an apparatus that allows measurement of the small force between two current carrying conductors. It consists of two parallel horizontal bars, which are connected in series. The current flows in opposite directions in the two conductors so there is a repulsive force between them, by Newton’s third law there are equal and opposite forces on both wires. In the...

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### Resistance and Electric Circuits

| Resistance and Electric Circuits | Lab 5 | | | The goal of the “Resistance and Electric Circuit” Lab was to determine the resistivity of a conducting wire given two known resistors. The main property of resistivity is that it represents how easily electrons can flow through a material. A Galvanometer is used to measure the current of the circuit and the Wheatstone Bridge is used to measure the resistances and determine the unknown resistance. This experiment also relates Ohm’s Law...

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### Magnetic Effect of Electric Current

CHAPTER - 13 MAGNETIC EFFECTS OF ELECTRIC CURRENT 1) Magnetic field and Field lines:- a) Magnetic field :- The region around a magnet where the force of attraction or repulsion can be detected is called magnetic field. Magnetic field around a magnet can be detected by using a magnetic compass. b) Magnetic field lines:- Magnetic field lines are the paths around a magnet along which the north pole of a magnetic compass needle tends to move. The magnetic field lines around...

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### Magnetic Effects of Electric Current

Magnetic effect of electric current is one of the major effects of electric current in use, without the applications of which we cannot have motors in the existing world. A current carrying conductor creates a magnetic field around it, which can be comprehended by using magnetic lines of force or magnetic field lines. The nature of the magnetic field lines around a straight current carrying conductor is concentric circles with centre at the axis of the conductor. The direction of the magnetic field...

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### Electric Currents Review

________________________ Date ___________ Block ___ Electric Currents Review 1) When work is done on a positive test charge to move it from one location to another, potential energy ______________ (increases, decreases) and electric potential _____________________ (increases, decreases). 2) When a positive test charge naturally moves from one location to another (without the exertion of a non-conservative force), potential energy _________________ (increases, decreases) and electric potential ______________ (increases...

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### Gg Ka Wew

Voltmeter A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. Analog voltmeters move a pointer across a scale in proportion to the voltage of the circuit; digital voltmeters give a numerical display of voltage by use of an analog to digital converter. The first digital voltmeter was invented and produced by Andrew Kay of Non-Linear Systems (and later founder of Kaypro) in 1954. RHEOSTAT A rheostat is a device which is used...

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### Current and Resistance of a Wire and the Affects When the Length Changes

Current and Resistance Physics Investigation Aim: Investigate how the length of a wire affects the current and resistance of a wire. Prediction and Hypothesis: I think as you increase the length of the Constatan wire, you also increase the amount of resistance. The current is the flow of electrons; the current is dependent on the amount of voltage, which is applied. Voltage is the push given to the current. The current has to go through a circuit, which contains resistance so if you increase...

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