Student Exploration Circuits Vocabulary ammeter‚ circuit‚ current‚ electron‚ ohmmeter‚ Ohms law‚ parallel circuit‚ resistance‚ resistor‚ series circuit‚ voltage Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Strings of holiday lights can be designed in one of two ways. In some strings of lights‚ each light is connected to the others along a single wire (in series). In others‚ each light is attached to its own wire (in parallel). Suppose a single light bulb burns out. How do you think
Free Resistor Electrical resistance Series and parallel circuits
Nikola and Edison both worked restlessly on Edison’s (DC) direct current power. Nikola Tesla at one point was promised by Edison that he would get paid $50‚000 if he would improve Edison’s (DC) direct current power system‚ but Edison tricked Tesla and said that Tesla didn’t understand “American humor”. Nikola Tesla quit after that. Nikola Tesla was backed up by some people who wanted to be a part of his (AC) alternating current power system. One of these people was a man named George Westinghouse
Premium Thomas Edison Nikola Tesla Alternating current
CLASS 10 ELECTRICITY 1. How much current will an electric heater coil draw from a 220 volt line‚ if the resistance of the heater coil is 40? (1 Mark) (Ans) Given‚ R= 40‚ V=220 V We have the relation‚ I = V/R = 220/40 = 5.5 A 2. What is electric current? (1 Mark) (Ans) The rate of flow of charge per unit time through a conductor is called electric current. 3. What is the SI unit of electric current? (1 Mark) (Ans) The SI unit of electric current is ampere. It is denoted by the letter
Premium Electric current Electricity Electrical resistance
II: Ohm’s Law: Electricity‚ Magnets‚ and Circuits ( Ohm’s Law mA is milliamps‚ and _1‚000_____ milliamps equals one Ampere. • Move the potential (volts) and resistance (ohms) sliders and observe the current (amps) As voltage increases‚ current _increases__________. As resistance increases‚ current _decreases (slows)__. Fill out the tables below and check your work in the simulation. ( ½ pt each ) • Remember‚ the simulation shows milliamps. • You should show Amperes V = I
Premium Incandescent light bulb Volt Electric current
Procedure Part II: Ohm’s Law: Electricity‚ Magnets‚ and Circuits Ohm’s Law mA is milliamps‚ and_1000_ milliamps equals one Ampere. Move the potential (volts) and resistance (ohms) sliders and observe the current (amps) As voltage increases‚ current _increases_. As resistance increases‚ current ___decreases___. Fill out the tables below and check your work in the simulation. ( ½ pt each ) Remember‚ the simulation shows milliamps. You should show Amperes V = I * R 8.0 V .010A
Premium Incandescent light bulb Volt Electric current
leads Wire 220 Ω resistor 560 Ω resistor 1.0kΩ resistor 1. State Kirchhoff’s Current Law. The algebraic sum of the currents entering a node is equal to zero. 2. What is the equation for the total current in a parallel circuit? It= I1+I2+I3…. 3. Determine the total current in the following nodes. 1) It= 2mA+4mA+6mA= 0.012x10^-3=12mA 2) I + I1+I3= I2 I= 2mA+4mA= 1mA I= 1mA- 6mA I= -5mA 4. Determine the total current in the following circuit. It= I1+I2+I3= 10mA+20mA+40mA= 0.07 x 10^-3= 70mA
Free Resistor Series and parallel circuits Electric current
Over the course of history‚ many figures have been compared as the best in their field. Both typically share the star light‚ however‚ a few do not. Nikola Tesla and Thomas Alva Edison were both champions of the power of electricity and hold over a thousand patents combined. Both men were responsible for designing the future of technology‚ although Tesla never reaped the rewards of doing so. Thomas Edison and Nikola Tesla both discovered‚ invented‚ and patented many new things‚ but both had very different
Premium Nikola Tesla Thomas Edison Alternating current
special characteristics of heater coil. 3. A wire of resistance 4 ohms is bent to form a circle. What is the resistance between two diametrically opposite ends? 4. How does the resistance of a conductor change if its temperature is increased? 5. A current of 4A flows in a wire of resistance 60 ohms. Calculate electrical energy consumed in 2 minutes. 6. V-I graph for two resistors is given. Which of the two has minimum resistance? 7. Alloys are used in electrical heating devices rather than pure metals
Premium Electricity Electrical resistance Electric current
Dc http://www.allaboutcircuits.com/vol_1/index.html ac http://www.allaboutcircuits.com/vol_2/index.html What is alternating current (AC)? Most students of electricity begin their study with what is known as direct current (DC)‚ which is electricity flowing in a constant direction‚ and/or possessing a voltage with constant polarity. DC is the kind of electricity made by a battery (with definite positive and negative terminals)‚ or the kind of charge generated by rubbing
Premium Electrical generator Alternating current Transformer
LEVEL 2 UNITChapter 204 1 Principles of electrical science 11 Level 2 Electrical Installations (Buildings and Structures) This chapter covers: Chapter 1 the principles of electricity the principles of basic electrical circuits the principles of magnetism and electromagnetism the operating principles of a range of electrical equipment the principles of basic mechanics the principles of a.c. theory electrical quantities in Star Delta configurations. LO1 Matter – something that has weight
Premium Resistor Electric current Series and parallel circuits