香港考試局
... B. (1) and (3) only C. (2) and (3) only D. (1), (2) and (3) Power output and Resistance 39. A steadily running motor draws a current of 1 A from a battery of e.m.f. 8 V. The internal resistance of the battery is negligible. If the resistance of its armature coil is 3.0 Ω, estimate the efficiency of ...
... B. (1) and (3) only C. (2) and (3) only D. (1), (2) and (3) Power output and Resistance 39. A steadily running motor draws a current of 1 A from a battery of e.m.f. 8 V. The internal resistance of the battery is negligible. If the resistance of its armature coil is 3.0 Ω, estimate the efficiency of ...
parallel circuits
... Resistors are colour coded. To read the colour code of a common 4 band 1K ohm resistor with a 5% tolerance, start at the opposite side of the GOLD tolerance band and read from left to right. Write down the corresponding number from the colour chart below for the 1st colour band (BROWN). To the right ...
... Resistors are colour coded. To read the colour code of a common 4 band 1K ohm resistor with a 5% tolerance, start at the opposite side of the GOLD tolerance band and read from left to right. Write down the corresponding number from the colour chart below for the 1st colour band (BROWN). To the right ...
Summer Holiday Home work Session 2012
... accompanied by brisk effervescence .When the gas was passed through water, the solution obtained turned bluelitmus red. On bubbling the gas through lime water ,it initially becomes molky and the milkiness disappeared when the gas was passed in excess.Identify the substance “X” and write the chemical ...
... accompanied by brisk effervescence .When the gas was passed through water, the solution obtained turned bluelitmus red. On bubbling the gas through lime water ,it initially becomes molky and the milkiness disappeared when the gas was passed in excess.Identify the substance “X” and write the chemical ...
02 Electrical Measurements and Ohms Law
... Part #1 Direct Measurement of Resistance The device designed to measure a Resistance is called an ohmmeter. The Ohmmeter can be a part of a Multimeter, a device designed to measure multiple quantities including a Resistance. There should be no voltage across the resistor when its resistance is measu ...
... Part #1 Direct Measurement of Resistance The device designed to measure a Resistance is called an ohmmeter. The Ohmmeter can be a part of a Multimeter, a device designed to measure multiple quantities including a Resistance. There should be no voltage across the resistor when its resistance is measu ...
Circuits Answer Key
... The Circuits Gizmo™ shows a circuit board and a variety of components. Create a circuit with a battery, a light switch, a wire, and a light bulb, as shown. (Click the light switch to turn it to OFF.) 1. Click the light switch to turn it to ON. What happens? The light bulb starts to glow. 2. Turn on ...
... The Circuits Gizmo™ shows a circuit board and a variety of components. Create a circuit with a battery, a light switch, a wire, and a light bulb, as shown. (Click the light switch to turn it to OFF.) 1. Click the light switch to turn it to ON. What happens? The light bulb starts to glow. 2. Turn on ...
Series and parallel circuits
... The power sockets in a home are wired to the mains electricity supply using cables containing 2.5 mm2 copper wires. Most electrical appliances are connected to the mains electricity supply by plugging them into a standard power socket. It would not be safe to connect the electric cooker hob to the m ...
... The power sockets in a home are wired to the mains electricity supply using cables containing 2.5 mm2 copper wires. Most electrical appliances are connected to the mains electricity supply by plugging them into a standard power socket. It would not be safe to connect the electric cooker hob to the m ...
Direct Current and Alternating Current. Series Circuits and Parallel
... the voltage reverses itself 60 times per second. In some countries, the voltage reverses itself 50 times per second. • Normal outlet voltage in the US is 110-120 volts, although some large household appliances run on 220-240 volts. ...
... the voltage reverses itself 60 times per second. In some countries, the voltage reverses itself 50 times per second. • Normal outlet voltage in the US is 110-120 volts, although some large household appliances run on 220-240 volts. ...
Electricity Packet
... Steps to follow when diagramming circuits: (Always diagram in right angles. No loops or curves: it is a diagram, not a drawing.) 1. Draw the symbol for the battery or other source of electric energy (such as a generator) at the left side of the page. Put the positive terminal on top. 2. Using a rul ...
... Steps to follow when diagramming circuits: (Always diagram in right angles. No loops or curves: it is a diagram, not a drawing.) 1. Draw the symbol for the battery or other source of electric energy (such as a generator) at the left side of the page. Put the positive terminal on top. 2. Using a rul ...
R Measurement
... Measurement of Resistance: Ammeter – Voltmeter Methods The magnitude of resistance can be measured by different methods. One method is to measure the voltage drop V across a resistance n a circuit with a voltmeter and the current I through the resistance with an ammeter. Then using Ohm’s Law, R = V/ ...
... Measurement of Resistance: Ammeter – Voltmeter Methods The magnitude of resistance can be measured by different methods. One method is to measure the voltage drop V across a resistance n a circuit with a voltmeter and the current I through the resistance with an ammeter. Then using Ohm’s Law, R = V/ ...
Electric Circuits Notes
... 1. They like to give you various objects to put into circuit. You will be required to draw the circuit diagram. You might be required to construct a circuit using all the objects in which the current is as large or as small as possible. Or, one in which the circuit will have a prescribed function. 2 ...
... 1. They like to give you various objects to put into circuit. You will be required to draw the circuit diagram. You might be required to construct a circuit using all the objects in which the current is as large or as small as possible. Or, one in which the circuit will have a prescribed function. 2 ...
Basic Electrical Understanding
... • So Current is the flow…the flow of water • Current (I) is equivalent to the flow rate, and the resistance is like the pipe size. • Increase the pressure, more water comes out of the hose. • Increase the diameter of the hose and more water comes out of the hose ...
... • So Current is the flow…the flow of water • Current (I) is equivalent to the flow rate, and the resistance is like the pipe size. • Increase the pressure, more water comes out of the hose. • Increase the diameter of the hose and more water comes out of the hose ...
EE 201 Lab 1 Meters, DC sources, and DC circuits with resistors
... Use the ammeter to measure iS and then the currents in R1 and R2. The measurements won’t seem to make much sense with Kirchhoff’s current law. Again, this happens because the ammeter is not ideal. In the case of the ammeter, which must be connected in series with a ...
... Use the ammeter to measure iS and then the currents in R1 and R2. The measurements won’t seem to make much sense with Kirchhoff’s current law. Again, this happens because the ammeter is not ideal. In the case of the ammeter, which must be connected in series with a ...
Direct Current Measurement and Ohm`s Law
... When preparing to draw a graph the first thing to do is pick a scale to use on your graph paper. Unless you are merely making a rough graph to visualize the trend of data, the scales should be picked so that the graph fills between a half and a whole sheet of paper. A graph that is too small is usel ...
... When preparing to draw a graph the first thing to do is pick a scale to use on your graph paper. Unless you are merely making a rough graph to visualize the trend of data, the scales should be picked so that the graph fills between a half and a whole sheet of paper. A graph that is too small is usel ...
"The Line of Resistance" PowerPoint Presentation to the March
... – Number of electrons that move past a point (plane) per second – (River current flow analogy – water current flow depends on width and depth of water, density of water, and the speed of the water: water flow is the number of water molecules that pass a point (plane perpendicular to motion) per seco ...
... – Number of electrons that move past a point (plane) per second – (River current flow analogy – water current flow depends on width and depth of water, density of water, and the speed of the water: water flow is the number of water molecules that pass a point (plane perpendicular to motion) per seco ...
