MAGNETIC EFFECTS OF ELECTRIC CURRENT In this chapter, we will study the effects of electric current : Moving charges or electric current generates a magnetic field. 1.Hans Christian Oersted (1777-1851) Oersted showed that electricity and magnetism are related to each other.His research later used in radio, television etc.
Magnetic Field Due to a Current Carr ying Conductor Oersted's experiment W hen electric current flows throug h a current carr ying conductor, i t produces a magnetic field around i t. This can be seen wi th the help of a magnetic needle which shows deflection. The more the current, the hig her the deflection.
in the magnetic needle also ceases. Thus magnetic field is an effect of flow of electric current through conducting wire. In the year 1820 a scientist from Denmark named H.C. Oersted observed this effect for the first time. (a)(b) Fig. 17.6 The principle of the magnetic effect of electric current used in many appliances like motor etc. 17.4 ...
No electric current flows through any part of the circuit. Heating effect of electricity-When current flows through a conductor, some of the electrical energy is converted into heat energy Household appliances like electric bulb, hot plates, geysers, hair dryers electric heater, iron, electric oven etc. work on this principle.
and the generator potential or current by use of the Equations (5 and 6). The ratio of heat development in various layers, obtained in this manner, permits one to predict how much heat is developed in the "deep tissues". (See also Microwaves No. I.): , , ., . F Effects of Electricity on Humans In considering the effects of electricity on a ...
ü Leave at least 3 feet of workspace around electrical equipment for instant access. ü Keep your work area clean. Be especially careful with oily rags, paper, sawdust, or anything that could burn. ü Follow manufacturer’s instructions for all electrical equipment. ü Leave electrical repairs to skilled maintenance personnel and licensed ...
An electric current passed through a wire produces heat. The amount of heat produced will depend on the type of metal used. Nichrome is a metal used in electric fires as it requires a lot of energy to allow the electric current to pass through. This proves that an electric current has a heating effect.
of electrical current in different ways. For the safety of the volunteers, this research was conducted only at low levels of current, with medical personnel present. Later, additional research was carried out to determine the correctness of extrapolating Dalziel’s findings to higher current levels. By monitoring the voltage applied, the re-
Electric Kettles Toaster Electric iron etc. Magnetic Effect: When current flows in a straight wire, coil, or solenoid, a magnetic field is produced around them. The strength of the field depends on the value of current and distance from the wire. Uses of magnetic effect: The magnetic effect is used in galvanometers to detect the current
• Determining the direction of force on a current-carrying conductor in a magnetic field • Sketching and interpreting magnetic field patterns • Determining the direction of the magnetic field based on current direction • Solving problems involving magnetic forces, fields, current and charges Topic 5: Electricity and magnetism
MOVING CHARGES AND MAGNETISM - NCERT
38 Principle of Electric motor: When a rectangular coil is placed in a magnetic field and a current is passed through it, force acts on the coil, which rotates it continuously. With the rotation of the coil, the shaft attached to it also rotates. induction. Electromagnetic induction: Electricity production as a result of magnetism (induced current) is
Notes PHYSICS MODULE - 5 Magnetism and Magnetic Effect of Electric Current Electricity and Magnetism 98 z derive an expression for the force experienced by a current carrying conductor placed in a uniform magnetic field; z derive an expression for the force between two infinitely long current carrying conductors placed parallel to each other; and z explain the working principle of a ...
Chemical Effects of Electric Current • On passage of electric current through a solution following chemical effects may be seen: (i) Bubbles of a gas on electrodes (ii) Deposits of metal on electrodes (iii) Change of colour of solution • Conduction of Electricity by Liquids: (i) Liquids containing salts, acids or bases conduct electricity.
Chemical effect: electric current can lead to the production of chemical energy or chemical reactions. Chemical effects of electric current We know that when an electric current passes through solution it ionizes and breaks down into ions. This is because of chemical reactions that take place when an electric current passes through a solution.
a) Most liquids that conduct electricity are solutions of acids, bases and salts. (The solutions of acids, bases, and salts can conduct electricity because they produce ions when dissolved in water and allow an electric current to pass through them.) b) The passage of an electric current through a solution causes chemical effects.
unit used in electric fans, irrigation pumps etc. zFaraday discovered the phenomenon of electromagnetic induction, according to which a current is induced in a coil when the strength of magnetic field associated with the coil is changed. The current remains in the coil till the change in magnetic field is continued. 17. Magnetic Effect of ...
