{"id":11581,"date":"2022-11-18T15:30:01","date_gmt":"2022-11-18T10:00:01","guid":{"rendered":"https:\/\/www.aplustopper.com\/?p=11581"},"modified":"2022-11-19T15:46:31","modified_gmt":"2022-11-19T10:16:31","slug":"transformer-working-principle","status":"publish","type":"post","link":"https:\/\/www.aplustopper.com\/transformer-working-principle\/","title":{"rendered":"How Does a Transformer Work?"},"content":{"rendered":"
Figure shows a power supply unit found in school laboratories. It is connected to the mains supply which supplies it with an input voltage of 240 V. Using the voltage selector, you can select output voltages from 2 V to 12 V. What changes the input voltage from 240 V to a lower output voltage? Operating Principle of a Transformer:<\/strong><\/p>\n People also ask<\/strong><\/p>\n Step-up and Step-down Transformers:<\/strong><\/p>\n Aim:<\/strong> To understand a step-up and a step-down transformer. Step-up Transformer<\/strong><\/p>\n Step-down Transformer<\/strong><\/p>\n Observations: Conclusion:<\/strong><\/p>\n Aim:<\/strong> To show the relationship\u00a0Vs<\/sub>\/Vp<\/sub> = Ns<\/sub>\/Np<\/sub> Observations:<\/strong> Discussion:<\/strong><\/p>\n Conclusion:<\/strong> <\/p>\n Figure shows a transformer being used to operate a 6 V, 48 W heater from a 240 V a.c. supply. How Does a Transformer Work? Figure shows a power supply unit found in school laboratories. It is connected to the mains supply which supplies it with an input voltage of 240 V. Using the voltage selector, you can select output voltages from 2 V to 12 V. What changes the input voltage from 240 V […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[404],"tags":[4319,4325,4320,4322,4327,4317,4326,4318,4323,4321,4324],"yoast_head":"\n
\nThe main component found inside the power supply unit is a transformer. Transformers <\/strong>can decrease or increase the a.c. voltage supplied <\/strong>to it.<\/p>\n\n
\n<\/li>\n
\n<\/li>\n<\/ol>\n\n
What are the different types of transformers?<\/strong><\/h2>\n
\n
\n(a) The step-up transformer
\n(b) The step-down transformer<\/li>\n
\n<\/li>\n<\/ol>\nStep-up and Step-down Transformers Experiment<\/strong><\/h2>\n
\nMaterials:<\/strong> 120-turn copper coil, 400-turn copper coil, connecting wires
\nApparatus:<\/strong> Two C-shaped iron cores with clip, insulated wires, low voltage a.c. power supply, two 2.5 V 0.3 A bulbs with holders and two 6.2 V 0.3 A bulbs with holders
\nMethod:<\/strong><\/p>\n\n
\n
\n<\/strong>Discussion:<\/strong><\/p>\n\n
\n
Relationship between Turns Ratio and Voltage Ratio Experiment<\/strong><\/h2>\n
\nMaterials:<\/strong> Copper coils with 300, 600 and 900 turns respectively, connecting wires
\nApparatus:<\/strong> Soft iron cores, 0 – 12 V a.c. power supply, two a.c. voltmeters (0 – 10 V)
\nMethod:<\/strong><\/p>\n\n
\n<\/p>\n\n
\nThe ratio of the secondary output voltage to the primary input voltage is equal to the ratio of the number of turns in the secondary coil to the number of turns in the primary coil.<\/p>\nTurns Ratio and Voltage Ratio Problems with Solutions<\/strong><\/h2>\n
\n
\n
\nWhat is the value of Ns<\/sub>\u00a0if the bulb were to light up at normal brightness?
\nSolution:<\/strong>
\nWhen the bulb lights up at normal brightness, the voltage across it is 12 V.<\/li>\n<\/ol>\nRelationship between Output Power and Input Power of an Ideal Transformer<\/strong><\/h2>\n
\n
\n<\/li>\n
\nOutput power = Input power
\nThat is:
\n<\/li>\n<\/ol>\nTransformer Primary and Secondary Current Calculation<\/strong><\/h2>\n
\n
\nCalculate
\n(a) the number of turns in the primary coil,\u00a0Np<\/sub>
\n(b) the current in the secondary coil, Is<\/sub>
\n(c) the current in the primary coil,\u00a0Ip<\/sub>
\nSolution:<\/strong>
\n<\/p>\n","protected":false},"excerpt":{"rendered":"