1. A 25 ohm resistor has an average power of 400 watts. Determine the maximum value of the current if it is a (a) sinusoidal‚ (b) triangular. 2. Determine the effective value Vrms of the voltage function given by v(t) = 100+25 sin 3wt + 10 sin 5wt volts. 3. What average power results in a 25 ohm resistor when it passes a current i(t) = 2+3 sin wt +2 sin2wt + 1 sin 3wt amperes. 4. Calculate Irms if i(t) = 50 + 40 sin wt amperes. 5. Calculate Irms if i(t) = 150 + 50 sin wt +
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G10 science By Freya Li Practical Investigation Resistance in Wire Aim: To investigate if the length of wire affects its resistance and find out how the resistance changes when the length of wire increases. Hypothesis: My prediction is that as the length of wire increases‚ the resistance will also increase. This is because current is the flow of electrons in a circuit and voltage makes the electrons flow through the circuit. The electrons have to collide with the atoms in the wire‚ which makes
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J. Reiss Albert K. Cohen Andre Michel Guerry Austin T. Turk Charles Horton Cooley Charles R. Tittle Clifford R. Shaw David Metza Delbert Elliott Edmund Husserl Edwin Lemert Edwin Sutherland Emile Durkheim Ernest Burgess F. Ivan Nye Georg Rusche George B. Vold George Herbert Mead Gordon Trasier Gresham Sykes Hans Eysenck Henry McKay Howard Becker Howard Kapkin Ian Taylor‚ Paul Walton‚ Jock Young John Braithwaite Karl Marx Lambert Adolphe Lawrence E. Cohen Lloyd Ohlin
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Mixing of two solutions. 55 Class IX EXPERIMENT No: 9 AIM: To study the external features of root‚ stem‚ leaf and flower of monocot and dicot plants. Material Required : Plants of Hibiscus/Peturnia/rose/pea and grass/maize/bamboo/lily or‚ any other ornamental herb with flower and fruits‚ simple or dissecting microscope‚ hand lens‚ slide‚ coverslip and razor /blade. Procedure : 1. 2. 3. Observe the differences in the external features of stem‚ leaf‚ root‚ flowers and seeds. To study the leaf‚ see
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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 of the battery. The blue dots indicating the electrons move because there is a voltage across the battery in which the electrons flow away from the positive terminal
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The Necklace and Interlopers are two very well written short stories. In the Necklace‚ Mathilde desires more in her life. In Interlopers‚ Georg and Ulrich desire a piece of land and more importantly revenge. Both of these short stories characters are unhappy about their life‚ but when they try to fix it they cause even bigger problems. If you were never happy for what you had‚ and always wanted more‚ you would live your life like Mathilde. In the Necklace‚ Mathilde was a young woman whose life was
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Aspirin was discovered about 3500 years ago. A collection of 877 medicinal recipes‚ The Ebers papyrus‚ before Christ‚ from the middle of the second millennium had been bought during the last century from an Egyptian street vendor by Georg Ebers‚ a German Egyptologist Georg. He recommended an infusion of dried myrtle leaves for rheumatic and back pain. More than a thousand years later the father of all doctors‚ Hippocrates of Kos‚ prescribed a juice extracted from the bark of the willow tree for
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resistance in ohms of the cell. I will be using a 1.5V battery in the experiment. I will measure the voltage and current using multimeters. Calculation method I intend to rearrange the equation ‘ε=Ir+IR’ to form ‘V= -Ir +ε’ and then draw the y=mx+c graph equation to find EMF and internal resistanc`e. The y axis intercept measures EMF and the gradient gives you internal resistance. Projected main sources of error The multimeter has some inaccuracies: Resistance is accurate to 0.1 ohms (+/-0.8%)‚ Current
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EXPERIMENT NO. 1 INTRODUCTION TO LAB INSTRUMENTS. 1. BREADBOARD We should be familiar to the following things about a breadboard: * What is a breadboard and what is it used for? * How does it work? * Setting Up. * Limitations. What is a breadboard and what is it used for? A breadboard (or protoboard) is usually a construction base for prototyping of electronics. The term "breadboard" is commonly used to refer to a solderless breadboard (plugboard). It was designed by
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solid metal cube that measures 1 meter on each side)‚ resistivity is defined as the voltage measured across the unit cube length (V/m) divided by the current flowing through the unit cube ’s cross sectional area (I/m2). This results in units of Ohm m2/m or Ohm-m." [University of British Columbia Geophysical Inversion Facility] Temperature affects the movement of electrons in the material. When a signal voltage is passed through a wire the electrons collides with the atoms in the material. If more
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