It is made up of a series of electrical components and conductors e. Gcse science physics 91 calculating energy transferred. Gcse physics electricity how to calculate the power of. Electricity and electric circuits teaching resources the. The equations that are used for electricity click on an equation below for more information the two most important equations in electricity are given below p v x i power voltage x current v i x r voltage current x resistance other equations that you should know include.
Knowing how current, charge and power are calculated is extremely helpful in gcse physics when considering electrical circuits. The treatment throughout the handbook is practical with very little emphasis on theory. Shortcircuit current calculations electrical sector. Electrical circuit calculations series circuits many circuits have more than one conversion device in them i. Gcse physics index search physics quizzes gcse chemistry. Final plans for electrical rooms and closets final power oneline diagrams and riser diagrams final detail drawings of sections, elevations, and schedules for power distribution equipment completed load calculations completed specifications submittals provide industry standard submittal requirements. The handbook contains a wide array of topics and each topic is written by an authority on the subject. The following is an approximate electric power demand calculation. Suppose a power system were delivering ac power to a resistive load drawing 150 amps. It starts off with 5 questions using it in the pvi format then there are 4 further questions using the formula in a rearranged format. Electricity multiple choice questions bbc bitesize.
If youre taking gcse 91 combined science or gcse 9 1 physics. The figure below shows a car with an electric motor. In every case of conversion of energy, some of the energy is converted to internal energy. A structured worksheet to take students through using the gcse physics equations pvi. Academic program for nuclear power plant personnel, volume ii, columbia, md.
This manual is intended as a guide for electrical engineers and designers hereafter referred as the ae for the planning and design of the electrical power distribution and related systems. We can show how to calculate power using a lamp an electric light. Concepts like potential difference and current are incredibly abstract these ideas are novel and electricity and electric circuits teaching resources read more. In order to construct a building that will last into the future, a strong foundation is a prerequisite. Calculation of electrical energy energy onpage 157 we dealt with power arid noted that power is the rate at which energy is transferred from one place to another or from one form to another the formula that links energy and power is. Scroll down the page for lessons and examples for the following topics. Use kva for calculations unless load is resistive, ie. Weve seen the formula for determining the power in an electric circuit. Physics gcse revision cost of electrical power calculation.
Worksheet electricity calculations teaching resources. Energy calculation worksheet 2 you will use the information on this page and the results from counting the squares on the city grid to determine the energy, cost, and carbon footprint of the lights from this city. Greenred productions relaxing music recommended for you. In everyday life, there is a wide choice of electrical appliances available to buy. Electrical power calculations training jim phillips, p. Electrical power and energy transferred gcse duration. To make a flashcard simply print, cut out, fold and glue. Electrical power current gcse physics andor combined. Power power and efficiency edexcel gcse physics single.
This section describes circuits electric machines a circuit is a loop of wire with its ends connected to an energy source such as a cell or a battery. Electrical energy and power worksheets teaching resources. Learn about and revise transformer function and design, the transformer equation, and power calculations in transformers with gcse bitesize physics. The handbook of electric power calculationsprovides detailed stepbystep calculation procedures commonly encountered in electrical engineering. Power is measured in watts w, current, i, in amps a and voltage, v, in volts v. If the answer you have written is not right, change it. Gcseigcse physics solutions, examples, worksheets, videos. A series of free gcseigcse physics notes and lessons with examples and solutions. Power generated watts 0 0 140 900 1100 1160 1160 wind speed kmh 0 2 5 10 12 15 20. They are all designed to transfer electrical energy into other forms of energy, but not all appliances are as efficient as one another. Ks4gcse physics teaching resources teachit science. A nuclear power station has an electrical power output of 2 400 000 kw calculate how many nuclear power stations are needed to provide 25 000 000 kw of electrical power. Load i 150 a calculate the load voltage, load power dissipation, the power dissipated by the wire resistance rwire, and the overall power e. The table shows the electrical power generated by the wind for different wind speeds.
The two equations needed to calculate the cost of electricity are. Power w energy transferred time calculate the electrical energy used by the kettle in. Electrical power current gcse physics andor combined science. Physics 91 electrical power calculations teaching resources. The wire is connected in this way so a current can flow through it. If a blender is plugged into a 110 v outlet that supplies 2. Gcse physics power, voltage and current calculations. How can electrical power be calculated to calculate the power of a component we need to measure the voltage across the component and the current flowing through the component. Worksheets and lesson ideas to challenge students aged 11 to 16 to think hard about electric circuits gcse and key stage 3 electricity is a challenging concept to teach.
In 20, about 80% of icelands electricity was generated using hydroelectric power stations hep. Kva is apparent power, is always greater than or equal to kw and is the product of volts x amps 1 phase, volts x amps x, v3, 3 phase. Calculating electric power ohms law electronics textbook. The actual, realized electric power demand of the building may differ up to approximately 25% compared to the results calculated here. Electrical power and energy transferred gcse youtube. If youre a subscriber, you can adapt them to make them perfect for your students and your teaching objectives have a look at some of our handpicked resources for ks4 through to ks4 physics. A video lesson covering electrical power piv, and how this applies to fuses, and also how to calculate energy transferred by a device eivt or ept. Then watch the tutorial video to complete the answer page. A set of past paper questions that all require more than one equation calculation per question. Gcse physics unit 1 revision book 2018 crickhowell high school. Van valkenburgh, nooger, and neville, basic electricity, vol.
In the above circuit, we know we have a battery voltage of 18 volts and a lamp resistance of 3. Gcse physics calculations in electricity links to all. Gcse physics revision questions electricity current. Physics igcse 2012 exam revision notes by samuel lees and adrian guillot 1. The light bulb creating light energy from electrical energy. The amount of energy transferred by electrical work can be calculated using the equation. P iv p i2r calculations usefulness of electrical appliances. Gcse science physics 91 triple nuclear fission and nuclear fusion duration. The best way to remember the information in this chapter is to get a pen and paper and write down your answers before clicking on the answer link which will take you to the correct page you may have to read through some of the page before you find the answer. Energy and power work, power and efficiency aqa gcse. The rate at which energy is transferred is called power and the amount of energy that is usefully transferred is called efficiency. Transformer power transfer transformers edexcel gcse. Select and use a suitable equation to calculate the total resistance of. One end of the wire is connected to the positive terminal.
Nasar and unnewehr, electromechanics and electric machines, john wiley and sons. The circuit below shows where to place an ammeter and a voltmeter power voltage x current p v x i. Electrical power depends on the current and the voltage. Rotate to landscape screen format on a mobile phone or small tablet to use the mathway widget, a free math problem solver that answers your questions with stepby. Our resources provide you with creative teaching ideas and activities for your science class. Gcse physics specification specification for first. The current only flows in an electrical circuit when the path is completely closed, forming a.
This will depend on how your region produces electricity. Revision questions for electricity see also mains electricity. Electricity topic student checklist r a g e draw and interpret circuit diagrams, including all common circuit symbols define electric current as the rate of flow of electrical charge around a closed circuit calculate charge and current by recalling and applying the formula. Pearson edexcel international gcse thursday 10 january 2019. Multiple choice questions are perhaps the easiest to complete you simply put a cross in a box however, the questions often have two answers that could. Very few universities teach per unit and symmetrical components calculations anymore but it is still a fundamental concept for electric power system analysis.
If the circuit components are connected end to end to form a single loop it is a seriescircuit. Memory music, improve memory and concentration, binaural beats focus music duration. Swiftscience new aqa gcse 2016 physics electricity. Describe how electricity is generated in a hydroelectric power station. Gcse physics which equations are used for electricity. Energy is a key principle in physics, as it allows work to be done. Free 0 nftb99 activote quiz for aqa spec on energy and efficienc. An electrical circuit is the complete loop through which an electrical current flows.