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ELECTRICITY Homework Sheet 1 Due: …… / …… / 20……Week 2 This sheet is to be placed in your homework folder and handed in for marking on the due date. Keep all completed homework sheets in your homework folder as they will make an excellent study resource. Credit will be given for completed homework sheets. Some research may be necessary to answer all questions. “It wasn’t in my book” will not be accepted as a satisfactory excuse. Vocabulary: Write the meanings of the following words: Electricity……………………………………………………………………………………………………………………………… Current…………………………………………………………………………………………………………………………………… Nichrome………………………………………………………………………………………………………………………………… Magnet……………………………………………………………………………………………………………................ cell ………………………………………………………………………………………………………………………………………… generator………………………………………………………………………………………………………………………………… solar ………………………………………………………………………………………………………………………………………… nuclear ……………………................................................................................................ series ……………………………………………………………………………………………………………………………………….. parallel………………………………………………………………………………………………………………………………………. diagram…………………………………………………………………………………………………………………………………… current……………………………………………………………………………………………………………………………………… resistance………………………………………………………………………………………………………………………………… Amps(ampere)……………………………………………………………………………………………………………………… Volts…………………………………………………………………………………………………………………………………………… Ohms………………………………………………………………………………………………………………………………………… short circuit……………………………………………………………………………………………………………………………. TEACHER SIGNATURE/DATE PARENT SIGNATURE/DATE Electricity Homework Sheet 2 Due: …… / …… / 20……Week 3 1. This topic begins with electrostatics. Define the word static. ……………………………………………………………………………………………………… ………………………………………………………………………………………………………. 2. Describe a simple experiment that you performed in class to demonstrate the build up of static charges by friction. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… 3. Circuits are about electrodynamics rather than electrostatics. Define the word dynamic in this context. ………………………………………………………………………………………………………. 4. Circuits are made from electrical conductors. Describe how a conductor is different from an insulator. ……………………………………………………………………………………………………… ……………………………….……………………………………………………………………… ……………………………………………………………….……………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… 5. Draw circuit diagram symbols for the following components: power pack (power supply) ammeter ,switch (open), resistor, globes and voltmeter. TEACHER SIGNATURE/DATE PARENT SIGNATURE/DATE Electricity Homework Sheet 3 Due: …… / …… / 20……Week 4 1. A voltmeter measures ……………………… A voltage is a measure of the ………………… difference between two points in an electrical circuit. The units of voltage are ………………. This unit was named for the scientist called …………………… 2. An ammeter measures ……………………… Current is the rate of flow of………………… ……………………… in a circuit. The units of current are…………………… This unit was named for the scientist called----------. 3. a) Use Ohm’s Law to fill in the answers. Include units in your answers. Voltage(V) = Current (I) x Resistance(R) Total Voltage = 12V Total resistance = -------Total current = -----------Current through 2 Ohm resistor = ----------Current through 4 Ohm resistor = --------------Total Voltage = 20 V b) Current through 6 Ohm resistor = -----------Current through 3 Ohm resistor = ------------Voltage through 6 Ohm resistor = -----------Voltage through 3 Ohm resistor = ------------c) Current through each resistor = ………… Voltage across each resistor = ---------------Total resistance = ……………………........ TEACHER SIGNATURE/DATE PARENT SIGNATURE/DATE Homework Sheet 4 Due: …… / …… / 20……Week 5 1. Describe how an earth pin in the plug of an appliance is a safety measure. ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… 2. What is electricity and what is it used for ? …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… 3. What is Ohm’s law? What is the relationship between Voltage, Current and Resistance? ……………………………………………………………………………………………………… ……………………………………………………………………………………………………… ………………………………………………………………………………………………………. 4. What is used in a thermal and hydro power station? …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… 5. Research the beneficial and detrimental factors linked with the different ways of producing electricity. …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………………………………………………………… 6.Draw a circuit in series using 3 globes , battery, an ammeter and wires. TEACHER SIGNATURE/DATE PARENT SIGNATURE/DATE Homework Sheet 5 Due: …… / …… / 20……Week 6 1.State what is meant by the term ‘short circuit’ . ………………………………………………………………………………………………………………………………… 2. Write 5 rules for the safe use of electricity around the house. ………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………… 3. Explain why the fuses are important in a household electric circuit. ………………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………………… 4. Draw a circuit in parallel using 3 globes ,battery , voltmeter and wires. TEACHER SIGNATURE/DATE PARENT SIGNATURE/DATE
