Science Topic: Electrical Circuits Reinforcement Worksheet .
ScienceClass 8Topic: Electrical CircuitsReinforcement WorksheetName: Sec: Date:Q1. Choose the best answer:1. From the four circuits shown, which will have 'the brightest lit lamp or lamps'? Note thatthe bulbs and batteries are identical.2. The ratings for four typical domestic appliance fuses are 3A, 5A, 8A and 13A. Which fusewires will melt if a current of 6A is passed through them?a) 3A onlyc) 3A and 5A onlyb) 3A,5A and 8A onlyd) 3A,5A,8A and 13A3. Which of the circuit symbols means a 'meter for measuring potential difference'?(a)(b)(c)(d)4. If bulb b5 'blows' what happens to the other bulbs?(in circuit 21)a) b1, b2 and b3 stay lit but b4 and b6 also go outb) b1, b2, b3 and b6 stay lit, but b4 also goes outc) b1, b2, b3, b4 and b6 also go outd) b1, b2, b3, b4 and b6 stay litThe City School / Reinforcement Worksheet/ EoY 2015 / Science / Class 8/ Electrical CircuitsPage 1 of 7
5. Which of the following is a unit of current?a) Voltsc) joulesb) ampsd) ohmQ2. Fill in the blanksa) Flow of electrons is known as .b) The units for the measurement of current are .c) A circuit in which there is only one path for the current to flow is called .d) In a circuit energy is provided by the .e) In a parallel circuit, resistance as more resistors are added.f)The measure of how much an electrical component opposes the flow of current is calledQ3. Give one word answer.a) Continuous path for electrical charges to flow:b) Device used to measure current:c) Negatively charged particles:d) SI unit for electric current:Q4. (a) Draw a line from each circuit symbol below to the correct name.Circuit SymbolNameAmmeterSwitchBatteryBulb(b) Fred made circuit 1 as shown below:Name the component which is a source of electrical energy in an electric circuit.The City School / Reinforcement Worksheet/ EoY 2015 / Science / Class 8/ Electrical CircuitsPage 2 of 7
(c) Fred then made circuit 2 as shown:In the table below, tick a box to show whether circuit 1and circuit 2 are series or parallel circuits.Tick only two boxes.(d) What metal is usually used for wires in electric circuits?Q5. Write two hazards of electricity.Q6. Match column A with column B & write the answer in column ‘C’.Column Ai) CurrentColumn Ba. Voltii) Resistanceb. Ampereiii) Powerc. Joulesiv) Voltaged. Wattsv) Energye. OhmsColumn CThe City School / Reinforcement Worksheet/ EoY 2015 / Science / Class 8/ Electrical CircuitsPage 3 of 7
Q7. State whether the given statements are true or false. Rewrite the correct statement.i) A Galvanometer is used to measure voltage.[]ii) Resistance decrease when extra bulbs are put in series circuit.[]iii) Most components have resistance.[]iv) Another term for resistance is potential difference.[]Q8. Look at the circuit diagrams below and answer the questions.Circuit 1Circuit 2i) Which is the series circuit in the above diagrams?ii) Which circuit is called open circuit in the diagram?iii) In which circuit the bulbs will be brighter when the circuits are closed.iv) In which circuit, current is the same throughout.v) Connect an ammeter to one of the bulbs in series circuit in the diagram.vi) Connect a voltmeter to one of the bulbs in parallel circuit,viii) What is the advantage of parallel circuit over series circuit?x) Besides voltage what are the two variables in both the circuits?The City School / Reinforcement Worksheet/ EoY 2015 / Science / Class 8/ Electrical CircuitsPage 4 of 7
Q9a.What are the two types of resistors?b. Which resistor is used in fans and why?c. Write down the effect of adding more resistors in:Series circuit:Parallel circuit:Q10a. Identify the circuits in which the bulb would be lit. There may be more than one correctanswer.b. What is the name of this component? Can this component be used as a switch? Justify youranswer.c. Kate makes a circuit which includes the same component.Describe how the brightness of the lamp changes when the reading of the componentincreases.AVThe City School / Reinforcement Worksheet/ EoY 2015 / Science / Class 8/ Electrical CircuitsPage 5 of 7
Q11. Give the scientific reason of the following statement.a) Bathrooms are always fitted with pull-cord switches.b) As more bulbs are added in series, the bulbs get dimmer.c) In parallel circuit, if one bulb does not light, the others still work.d) Current is not consumed in the electrical circuits.Q12a. Differentiate between series and parallel circuit in term of current and voltage .Differences in term ofcurrentvoltageIn series circuitIn parallel circuitsb) Look at the circuit diagrams and answer the questions.1. Choose two circuits that have two bulbs controlled by oneswitch2. How could you increase the brightness of the bulb in circuitH3. Choose a circuit with an ammeter in the correct place4. Choose two series circuits that have brighter bulbs than circuitC5. Choose a circuit which has a dimmer bulb than circuitHThe City School / Reinforcement Worksheet/ EoY 2015 / Science / Class 8/ Electrical CircuitsPage 6 of 7
6. Why doesn’t the bulb light in circuitA?7. Choose a circuit which has a brighter bulb than circuitH8. Choose a circuit with two bulbs you can turn on and offindependently9. Copy circuit D and add in a voltmeter10. Which of all these circuits would have the brightestbulbs?11. Design a series circuit with two bulbs that are of the same brightness as those in circuit L.The City School / Reinforcement Worksheet/ EoY 2015 / Science / Class 8/ Electrical CircuitsPage 7 of 7
The City School / Reinforcement Worksheet/ EoY 2015 / Science / Class 8/ Electrical Circuits Page 3 of 7 (c) Fred then made circuit 2 as shown: In the table below, tick a box to show whether circuit 1 and circuit 2 are series or pa
Contemporary Electric Circuits, 2nd ed., Prentice-Hall, 2008 Class Notes Ch. 9 Page 1 Strangeway, Petersen, Gassert, and Lokken CHAPTER 9 Series–Parallel Analysis of AC Circuits Chapter Outline 9.1 AC Series Circuits 9.2 AC Parallel Circuits 9.3 AC Series–Parallel Circuits 9.4 Analysis of Multiple-Source AC Circuits Using Superposition 9.1 AC SERIES CIRCUITS
Using a retaining wall as a case-study, the performance of two commonly used alternative reinforcement layouts (of which one is wrong) are studied and compared. Reinforcement Layout 1 had the main reinforcement (from the wall) bent towards the heel in the base slab. For Reinforcement Layout 2, the reinforcement was bent towards the toe.
Footing No. Footing Reinforcement Pedestal Reinforcement - Bottom Reinforcement(M z) x Top Reinforcement(M z x Main Steel Trans Steel 2 Ø8 @ 140 mm c/c Ø8 @ 140 mm c/c N/A N/A N/A N/A Footing No. Group ID Foundation Geometry - - Length Width Thickness 7 3 1.150m 1.150m 0.230m Footing No. Footing Reinforcement Pedestal Reinforcement
Topic 5: Not essential to progress to next grade, rather to be integrated with topic 2 and 3. Gr.7 Term 3 37 Topic 1 Dramatic Skills Development Topic 2 Drama Elements in Playmaking Topic 1: Reduced vocal and physical exercises. Topic 2: No reductions. Topic 5: Topic 5:Removed and integrated with topic 2 and 3.
Timeframe Unit Instructional Topics 4 Weeks Les vacances Topic 1: Transportation . 3 Weeks Les contes Topic 1: Grammar Topic 2: Fairy Tales Topic 3: Fables Topic 4: Legends 3 Weeks La nature Topic 1: Animals Topic 2: Climate and Geography Topic 3: Environment 4.5 Weeks L’histoire Topic 1: Pre-History - 1453 . Plan real or imaginary travel .
6. Exploring Electrical Circuits A lesson to provide opportunities to simulate electrical circuits. Providing a hands-on shared investigation of the creation of electrical circuits. Students apply their understanding of electrical circuits. STEM Design Challenge: Circuit Design Design a board game that incorporates an electrical circuit. 7.
1 Introduction to RL and RC Circuits Objective In this exercise, the DC steady state response of simple RL and RC circuits is examined. The transient behavior of RC circuits is also tested. Theory Overview The DC steady state response of RL and RC circuits are essential opposite of each other: that is, once steady state is reached, capacitors behave as open circuits while inductors behave as .
Introduction Description logics (DLs) are a prominent family of logic-based formalisms for the representation of and reasoning about conceptual knowledge (Baader et al. 2003). In DLs, concepts are used to describe classes of individuals sharing common properties. For example, the following concept de-scribes the class of all parents with only happy children: Personu has-child.Personu has .
