should be able to: Define capacitance Use the capacitance formula Determine capacitance of parallel plate Deduce & calculate the effective capacitance of capacitors in series & parallel 2.1.1 Capacitor capacitor is electric component to store electric charge it is consists two conducting plates separated by a small air gap or a thin insulator (called dielectric such as mica‚ ceramics‚ paper) the conducting plates could be in the shape of : i. cylindrical ii. spherical iii. parallel
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Joseph John Thomson was born on December 18‚ 1856 near Manchester‚ England. His father died when J.J. was only sixteen. Thomson attended Owens College in Manchester‚ where his professor of mathematics encouraged him to apply for a scholarship at Trinity College‚ one of the most prestigious of the colleges at Cambridge University. Thomson won the scholarship‚ and in 1880 finished second in his class in the grueling graduation examination in mathematics. Trinity gave him a fellowship and he stayed
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positively charged as a) negative charges are transferred from the rod to the silk. b) negative charges are transferred from the silk to the rod. c) positive charges are created on the surface of the rod. d) positive charges are transferred from the silk to the rod. e) positive charges are transferred from the rod to the silk. 21.3.1. Complete the following statement: When a glass rod is rubbed with silk cloth‚ the rod becomes positively charged as a) negative charges are transferred from the rod
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SAMPLE PROBLEMS: 112- Topic 1: ELECTRIC FORCES & ELECTRIC FIELDS. 1) Charges of - 6 and + 4 nC are 3 m apart. Determine the force they exert on each other‚ and the electric field at a point midway between them. |Solution: This is an electrostatics problem (stationary charges). Since the charges|[pic] | |are of opposite sign‚ they will attract each other. The forces are indicated in the|
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Model of the Atom 1. In 1911 Rutherford proposed the nuclear model of atomic structure. He suggested that an atom consists of a central nucleus (where most of the mass of the atom is concentrated) having a positive charge‚ surrounded by moving electrons carrying negative charge. Geiger and Marsden carried out an experiment to verify his proposal. The Geiger/Marsden a Particle Scattering Experiment 1. The apparatus is illustrated in the diagram below. | 2. The apparatus was in an evacuated
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Project Electric Field Hockey Objective: Write two paragraphs. Explain the challenges of scoring goals in this game. Be sure to include in your explanation the terms positive and negative charge‚ electric field line and explain how mass affects the motion of the “puck.” This simulation project is all about getting the puck into the goal while surround the puck with using few positive and electric charges. The positive charges have made the puck bounce back off‚ while the negative charges have made
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(χm) ? 1 Q.2 A metallic wire 1 m in length is moving normally across a field of 0.1 T with a speed of 5 ms-1. Find the emf between the ends of the wire. 1 Q.3 What is the angle between the directions of electric field at any (i) axial point and (ii) equatorial point due to an electric dipole ? 1 Q.4 A(hypothetical) bar magnet (AB) is cut into two equal parts. One part is now kept over the other‚ so that pole C2 is above C1. If M is the magnetic moment of the original magnet‚ what would
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The first poem I am going to write about is the Charge of the Light Brigade by Alfred lord Tennyson. Alfred was born on the 6th of August 1809 in Lincolnshire England. Alfred died on the 6th of October 1892. The poem is talking about war that he read in the newspaper and he wrote a poem about them. The battle took place in the 1854. Alfred was not a soldier in the war he think war is a good thing. In the first verse it talks about the six hundred soldiers going to war in
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because in his experiments the cathode rays were not deflected by an electric field. However‚ Thomson repeated the experiment in a vaccum‚ in which there was no polarisable air to mask the electric field and demonstrated that electric fields could deflect cathode rays. Having shown that the rays were made up of negatively charged particles‚ he procedded to use their combined electric and magnetic fields to find the charge in mass ratio(e/m) of the particles‚ which did not vary from one cathode
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Early History of Electric Power Date Event Pictures 1800-1819 Early electric experiments were performed with DC. In 1800‚ Alessandro Volta published a description of a silver/zinc battery‚ acknowledging that he did not know how it worked. In 1807‚ Humphry Davy constructed a practical battery (the picture will be immediately familiar to anyone who works with UPS systems)‚ and demonstrated both incandescent and arc light. • Volta’s famous bi-metalic frog twitch (I did this one myself as a boy..
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