Chapter 1 Principles of Electricity Practice Problems 1. One coulomb of charge passes a point every 20 seconds. Calculate the value of the current through the point. I = Q/t = 1 coulomb/20 seconds = 0.05C/s = 0.05 A 2. A total charge of 2.5x10^-3 C passes a point every 40 seconds. Calculate the value of the current through the point. I=Q/t = 2.5C/40s = 0.0625C/s = 0.0625 A 4. A total charge of 50x10^-3 C passes a point every 2.5 seconds. Calculate the
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which an lead Antibiotic resistance‚ allergens and toxins to food and so on. Today we will discuss about both side of this topic. Crops can be increased more resistances such as Pest resistance‚ Herbicide tolerance‚ Disease resistance and so on. For example‚ crops be modified that can increase pests resistance that prevent the loss from insect pests than the others‚ become more resistant to the unexpected problems of disease‚ by increasing pests and disease resistances that leads famers would
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FORMULAS OHM’S LAW/POWER FORMULAS R x I2 E x I P R P E E2 RxI R P I P x R E I P I E R E R P I2 E2 P P = Power = Watts R = Resistance = Ohms I = Current = Amperes E = Force = Volts 1-1 OHM’S LAW DIAGRAM AND FORMULAS E I E = I x R I = E ÷ R R = E ÷ I R Voltage = Current x Resistance Current = Voltage ÷ Resistance Resistance = Voltage ÷ Current POWER DIAGRAM AND FORMULAS P E I = P ÷ E E = P ÷ I P = I x E I Current = Power ÷ Voltage Voltage = Power ÷ Current
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predicted and actual resistance in a circuit of resistor combinations in series and in parallel. Background: A resistor is an electrical component/device that has electrical resistance. Resistors can be used in electric circuits for protection of components‚ voltage division or current control. In an ideal resistor the resistance remains constant regardless of the applied voltage or current‚ or the rate of change in the current (Resistor‚ 2005‚ Wikipedia). Electrical resistance is a measure of the
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NEW DIGAMBER PUBLIC SCHOOL Session :- 2012-13 subject :- Factors affecting internal resistance of a cell Made by :- Saurabh godha (xii - B) submitted to :- Mr. Harshad shevgaonkar Certificate NAME : Saurabh Godha CLASS : XII - B ROLL NO. : 19 INSTITUTION : New Digamber Public School This is certified to be the bonafide work of the student in the PHYSICS INVESTIGATORY PROJECT during the year 2012 / 2013 . ............................
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forming microorganism have a major medical significance as they decrease the susceptibility to the antimicrobial agents. Furthermore‚ the cell with biofilm forming ability can facilitate a plasmid exchange and hence enhance the spread of antimicrobial resistance. (Watnick P‚ Kotler R
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mutation? The changing of the structure of a gene What is antibiotic resistance? Antibiotic resistance is a type of drug resistance where a microorganism is able to survive exposure to an antibiotic. What is the scientific name for this process? methicillin-resistant Staphylococcus aureus Why is bacterial resistance a problem? Because they can cause diseases. What has led to an increase in the amount of bacterial resistance? Because the particles have grown over time. HIGHER Antibiotic-resistant
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Chapter 3: Current and Resistance Quick Quizzes - QUESTIONS 1. Consider positive and negative charges moving horizontally through the four regions in Figure 17.2. Rank the magnitudes of the currents in these four regions from lowest to highest. (Ia is the current in Figure 17.2a‚ Ib the current in Figure 17.2b‚ etc.) (a) Id ‚ Ia ‚ Ic ‚ Ib (b) Ia ‚ Ic ‚ Ib ‚ Id (c) Ic ‚ Ia ‚ Id ‚ Ib (d) Id ‚ Ib ‚ Ic ‚ Ia (e) Ia ‚ Ib ‚ Ic ‚ Id (f) none of these [pic] Figure 17.2 2. Suppose a current-carrying
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Techniques This section explains two circuit laws needed to analyze the circuit. 2.1 Ohm’s Law Ohm’s law is used to relate voltage across an element‚ current through it‚ and resistance of the element. Ohm’s law is expressed in (1)‚ where v is voltage across (volts)‚ I is current through (amps)‚ and R is resistance (ohms). The equation follows the passive sign convention. (1) 2.2
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experiment? Ohm’s Law - Ohm’s law states that the voltage (V) across a resistor is proportional to the current (I)‚ where the constant of proportionality is the resistance (R). Series and parallel resistors - The total resistance of resistors connected in series is the sum of their individual resistance values. The total resistance of resistors connected in parallel is the reciprocal of the sum of the reciprocals of the individual resistors. Power dissipation - where V (volts) is the
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