Series and Parallel Circuits
Which of the following statements are true about an electric circuit? List all that apply. TRUE - Physicists often speak of conventional current as the direction that positive charge moves through a circuit. In reality, the carrier of electric charge in an electric circuit is the electron.
FALSE - For charge to flow through an external circuit, the pathway must consist of conductive materials. The presence of a nonconductor would inhibit charge flow and low the current to zero. Whether the battery is inside the hood or not has nothing to do with it. If you were to place your battery on top of your hood, it would still be the internal circuit.
TRUE - The battery is the internal circuit; it is the place where charge acquires its energy. The external circuit consists of wires, light bulbs, resistors, etc. In the external circuit, charge has its electrical energy transformed into other forms as it passes through the elements of the external circuit.
FALSE - Charge is neither created nor destroyed, and as such, the amount of charge which enters a light bulb in a second is equal to the amount of charge which exits the light bulb in a second. This quantity charge per second is the current and it is everywhere the same in a circuit. When a battery no longer works, the ability of its chemical reaction to produce products and energy has become limited by the depletion of reaction and the build up of products. It has not run out of charge; it has run of out chemical reactants.
TRUE - Know this one! Which of the following statements are 96 explorer engine diagram about an electric potential or electric potential difference? TRUE - Electric potential, also known as voltage, is measured in units of volts. FALSE - The electric potential at a given location in a circuit is defined the electric potential energy per charge at the location.
Its units would be energy units per charge units - a Joule per Coulomb not simply a Joule. Electric potential is the potential energy per charge at a given location.Current is measured by the quantity of electrical charge that moves past a given point, like the circuit breaker, in a single second.
Typically, current means a stream of something from 1 place to a different place. In the event the current is small then the quantity of heat generated is inclined to be very little and might not be noticed. An electric current is created by the stream of electrons.
Series DC Circuits Practice Worksheet with Answers
Alternating Current AC is the manner electricity is supplied to homes and companies. The specific issue-level from a worksheet should truly be minimum. Knowledge of the worth of the electric field at a point, with no specific understanding of what produced the area, is all that is necessary to establish what is going to happen to electric charges near that specific point.
You ought to understand how to project cash flow. You should comprehend how to project cash flow. To earn a current flow using a resistance there has to be a voltage across that resistance. When a voltage is placed on the conductor, the free electrons all flow in the same direction, which is known as a current.
In AC circuit analysis, in the event the circuit has sources operating at various frequencies, the Superposition theorem may be used to fix the circuit. Thus, it is not complete. Relays and a multitude of different items utilize the result. Figure out which objects conduct electricity.
The electricity in your house is alternating current. Electric current is a significant quantity in electronic circuits. In semiconductors, both free electrons and holes are found. On the flip side, the electrons revolving at a larger distance from the nucleus have quite high energy. The worksheet needs to be pictorial. A worksheet can be ready for any subject. It should function as a tool to raise the content of a child.
The estimating worksheet was made to direct you get through the estimation practice. The worksheet should truly be pictorial.In this circuit, three resistors receive the same amount of current 4 amps from a single source.
Follow-up question: Compare the direction of current through all components in this circuit with the polarities of their respective voltage drops.
What do you notice about the relationship between current direction and voltage polarity for the battery, versus for all the resistors? How does this relate to the identification of these components as either sources or loads? The answers to this question should not create any surprises, especially when students understand electrical resistance in terms of friction : resistors with greater resistance more friction to electron motion require greater voltage push to get the same amount of current through them.
Resistors with greater resistance friction will also dissipate more power in the form of heat, given the same amount of current. Challenge your students to recognize any mathematical patterns in the respective voltage drops and power dissipations. The brightness of a light bulb - or the power dissipated by any electrical load, for that matter - may be varied by inserting a variable resistance in the circuit, like this:.
This method of electrical power control is not without its disadvantages, though. Calculate the power dissipated by the lamp, the power dissipated by the variable resistance, and the total power provided by the voltage source. Then, explain why this method of power control is not ideal. Follow-up question: note how in the original question I offered a set of hypothetical values to use in figuring out why a series rheostat variable resistance is not an efficient means to control lamp power.
Explain how the assumption of certain values is a useful problem-solving technique in cases where no values are given to you. Discuss the concept of energy conservation: that energy can neither be created nor destroyed, but merely changed between different forms.
Based on this principle, the sum of all power dissipations in a circuit must equal the total amount of power supplied by the energy source, regardless of how the components are connected together.
A modern method of electrical power control involves inserting a fast-operating switch in-line with an electrical load, to switch power on and off to it very rapidly over time. Usually, a solid-state device such as a transistor is used:. This circuit has been greatly simplified from that of a real, pulse-control power circuit. All you need to be aware of is the fact that the transistor operates like a simple, single-pole single-throw SPST switch, except that it is controlled by an electrical current rather than by a mechanical force, and that it is able to switch on and off millions of times per second without wear or fatigue.
If the transistor is pulsed on and off fast enough, power to the light bulb may be varied as smoothly as if controlled by a variable resistor. However, there is very little energy wasted when using a fast-switching transistor to control electrical power, unlike when a variable resistance is used for the same task. Explain why PWM power control is much more efficient than controlling load power by using a series resistance. When the transistor is on, is acts like a closed switch: passing full load current, but dropping little voltage.
Conversely, when the transistor is off, it acts like an open switch: passing no current at all. Students may have a hard time grasping how a light bulb may be dimmed by turning it on and off really fast. If done slowly, the result is a varying car speed. This technique is very popular in industrial power control, and is gaining popularity as an audio amplification technique known as Class D.
The benefits of minimal wasted power by the control device are many. Learning to mathematically analyze circuits requires much study and practice. Typically, students practice by working through lots of sample problems and checking their answers against those provided by the textbook or the instructor. While this is good, there is a much better way. For successful circuit-building exercises, follow these steps:.A worksheet template is a worksheet made by a skilled in the form of a table also already contains base information and also formulas that are left to utilize.
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Time is money, the more time we could utilize, the more business chance we could produce. Why we drain our time with making our own worksheet template if there is a worksheet template that we can utilize right away.
We have to enter information one by one also count it manually. Of course it will take a long time to complete the work. Compare if we use a worksheet template we just entry information once and we do not have to count it manually because the template will automatically count it. So what are you waiting for? Because only us could provide the most complete template worksheet or no one could match the worksheet template here.
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Remember me. Sign in Recover your password. A password will be e-mailed to you.Learning to mathematically analyze circuits requires much study and practice. Typically, students practice by working through lots of sample problems and checking their answers against those provided by the textbook or the instructor. While this is good, there is a much better way. For successful circuit-building exercises, follow these steps:. For AC circuits where inductive and capacitive reactances impedances are a significant element in the calculations, I recommend high quality high-Q inductors and capacitors, and powering your circuit with low frequency voltage power-line frequency works well to minimize parasitic effects.
One way you can save time and reduce the possibility of error is to begin with a very simple circuit and incrementally add components to increase its complexity after each analysis, rather than building a whole new circuit for each practice problem.
Another time-saving technique is to re-use the same components in a variety of different circuit configurations.
It has been my experience that students require much practice with circuit analysis to become proficient. To this end, instructors usually provide their students with lots of practice problems to work through and provide answers for students to check their work against.
While this approach makes students proficient in circuit theory, it fails to fully educate them. They also need real, hands-on practice building circuits and using test equipment. Another reason for following this method of practice is to teach students scientific method : the process of testing a hypothesis in this case, mathematical predictions by performing a real experiment.
Students will also develop real troubleshooting skills as they occasionally make circuit construction errors. Discuss these issues with your students in the same Socratic manner you would normally discuss the worksheet questions, rather than simply telling them what they should and should not do.
I never cease to be amazed at how poorly students grasp instructions when presented in a typical lecture instructor monolog format! An excellent way to introduce students to the mathematical analysis of real circuits is to have them first determine component values L and C from measurements of AC voltage and current. The simplest circuit, of course, is a single component connected to a power source!
Not only will this teach students how to set up AC circuits properly and safely, but it will also teach them how to measure capacitance and inductance without specialized test equipment. A note on reactive components: use high-quality capacitors and inductors, and try to use low frequencies for the power supply.
Small step-down power transformers work well for inductors at least two inductors in one package! If your students will be working with real circuits, then they should learn on real circuits whenever possible. If your goal is to educate theoretical physicists, then stick with abstract analysis, by all means! But most of us plan for our students to do something in the real world with the education we give them.
In most sciences, realistic experiments are much more difficult and expensive to set up than electrical circuits. Nuclear physics, biology, geology, and chemistry professors would just love to be able to have their students apply advanced mathematics to real experiments posing no safety hazard and costing less than a textbook. Exploit the convenience inherent to your science, and get those students of yours practicing their math on lots of real circuits!
Now, calculate the line current and power factor for the same circuit after the addition of a capacitor in parallel with the load:.
Why or why not? The answers to this question may seem really strange to students accustomed to DC circuit calculations, where parallel branch currents always add up to a greater total.In this science worksheet, your child learns about how light is reflected by mirrors.
In this science worksheet, your child draws circuit diagrams to represent two series circuits. Electricity will flow only through a circuit that has no gaps. Switches can open and close gaps in circuits to turn power on and off. In this science worksheet, your child learns about two types of switches and examines a circuit diagram to answer questions about this series circuit. In this science worksheet, your child will learn about common materials and items that come from nature such as wool, rubber tires, and silk ties or synthesized products that come from a factory such as nylons and plastic and connect each item to its natural or manufacturing origin.
Can salt water be a conductor?
Series DC Circuits Practice Worksheet with Answers
In this science worksheet, your child learns about how well different materials act as electrical conductors. Will this spoon conduct heat? In this science worksheet, your child learns about materials that are thermal conductors and thermal insulators. Can you spot 5 things in this picture that have changed as they cooled?
In this science worksheet, your child learns about how matter can change as it's heated or cooled. Which cake cools most quickly?
In this science worksheet, your child learns that different size cakes cool at different rates and determines the relative pace of cooling by reading the thermometers in each cake. What happens to these things when they're cooled? This science worksheet helps your child learn about freezing and the effect cold has on some objects, but not others.
Where is the sun coming from? In this science worksheet, your child learns about the Earth's rotation and how the sun shines on the planet, then draws where the sunlight is coming from.
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Catch a ray of sunlight Catch a ray of sunlight In this science worksheet, your child learns about how light is reflected by mirrors. Circuit diagrams Circuit diagrams In this science worksheet, your child draws circuit diagrams to represent two series circuits. Circuit switches Circuit switches Electricity will flow only through a circuit that has no gaps. Comes from nature! Conducting electricity Conducting electricity Can salt water be a conductor?
Cool and not-so-cool materials Cool and not-so-cool materials Will this spoon conduct heat? Cool changes Cool changes Can you spot 5 things in this picture that have changed as they cooled? Cool it off! Cool stuff Cool stuff What happens to these things when they're cooled? Day and night Day and night Where is the sun coming from?
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