Question 1Tips1 ptsA magnet attract objects made of iron and plastic.Group of answer choicesTrueFalse Flag question: Question 2Question 2Tips1 ptsAn electromagnet uses electricity to attract objects.Group of answer choicesTrueFalse Flag question: Question 3Question 3Tips1 ptsAn electromagnet cannot be turned off and on.Group of answer choicesTrueFalse Flag question: Question 4Question 4Tips1 ptsThe strength of an electromagnet depend on the kind of wire used.Group of answer choicesTrueFalse Flag question: Question 5Question 5Tips1 ptsExamples of device that use electromagnets include telephone, radio, and television.Group of answer choicesTrueFalse

Question 6Tips1 ptsWhat is static electricity?I. LightningII. rubbing things togetherIII. balloon sticking to a sweater.IV. continuous flow of electricityGroup of answer choicesII onlyIV onlyI, II, and III and II Flag question: Question 7Question 7Tips1 ptsWhy is a speed of 10km/hr required at school zones?Group of answer choicesTo keep the children safe from vehicular accidents.To prevent damage to vehicles.To prevent vehicles form bumping one another.To economize fuel. Flag question: Question 8Question 8Tips1 ptsWhich color absorbs most heat energy?Group of answer choicesvioletorangewhiteblack Flag question: Question 9Question 9Tips1 ptsAmanda is computing the speed of a moving train on a straight railway. She noted the distance covered. What other quantity should she record?Group of answer choicesdirectiontimepointsvelocity Flag question: Question 10Question 10Tips1 ptsWhich material will allow heat and electricity to pass through?Group of answer choicestirepaper clipstuffed toyribbon Flag question: Question 11Question 11Tips1 ptsWhich of the following factors will NOT affect the magnetism of an electromagnet? Group of answer choicesnumber of batteriesnumber of coils aroundsize of the nailmagnet Flag question: Question 12Question 12Tips1 ptsWhich is NOT a unit of speed?Group of answer choiceskphmiles/hoursecond/metermps Flag question: Question 13Question 13Tips1 ptsWhat kind of circuit follows a single path? Group of answer choicesseriesopenclosedparallel Flag question: Question 14Question 14Tips1 ptsLamps in households are often connected in parallel circuits. What is the reason behind this?Group of answer choicesThey are cheaper.The lights are dimmer and easy to see with.They use less current.You can switch them off separately. Flag question: Question 15Question 15Tips1 ptsWhy should you not turn on a switch if your hands are wet?Group of answer choicesThe wet hand may conduct electricity.The switch will not move.The switch will cut off electricity.The water will destroy the switch. Flag question: Question 16Question 16Tips1 ptsIf red and green lights hit a red apple, what happens to the red and green lights?Group of answer choicesGreen is reflected while green is absorbed.Both lights are absorbed.Red is reflected while green is absorbed.Both lights are reflected. Flag question: Question 17Question 17Tips1 ptsWhat do you call the materials that prevent the electricity and heat to flow through?Group of answer choicesconductioninsulatorsconnectorsconductors Flag question: Question 18Question 18Tips1 ptsWhy are light-colored clothes preferred by most people during summer?Group of answer choicesLight is absorbed; thus, material does into increases in temperature.Light prevents the heat from being absorbed.Light allows the heat to be absorbedLight is reflected; thus, material does not increase in temperature.

Boojho made an electromagnet by winding 50 turns of wire over an iron screw. Paheli also madean electromagnet by winding 100 turns over a similar iron screw. Which electromagnet will attractmore pins? Give reason.Question 8.Does the electric current have other effect except heating? Name it.Question 9.Explain the following.(a) Copper and aluminium wires are usually employed for electricity transmission. Explain thereason.(b) Explain how does the resistance of a wire vary with its length.(c) The tungsten is used almost exclusively for filament of electric lamp. Comment.www.n

Quiz InstructionsIdentify the given objects as CONDUCTOR or INSULATOR. Flag question: Question 1Question 1Tips1 ptsSilverGroup of answer choicesCONDUCTORSINSULATORS Flag question: Question 2Question 2Tips1 ptsDry woodGroup of answer choicesCONDUCTORINSULATOR Flag question: Question 3Question 3Tips1 ptsSea waterGroup of answer choicesCONDUCTORINSULATOR Flag question: Question 4Question 4Tips1 ptsRubberGroup of answer choicesCONDUCTORINSULATOR Flag question: Question 5Question 5Tips1 ptsGlassGroup of answer choicesCONDUCTORINSULATOR Flag question: Question 6Question 6Tips1 ptsCopperGroup of answer choicesCONDUCTORINSULATOR Flag question: Question 7Question 7Tips1 ptsGoldGroup of answer choicesCONDUCTORINSULATOR Flag question: Question 8Question 8Tips1 ptsSteelGroup of answer choicesCONDUCTORINSULATOR Flag question: Question 9Question 9Tips1 ptsDiamondGroup of answer choicesCONDUCTORINSULATOR Flag question: Question 10Question 10Tips1 ptsFabricGroup of answer choicesCONDUCTORINSULATOR Flag question: Question 11Question 11Tips1 ptsQuestion 11-20Directions: Classify the given objects as TRANSPARENT, TRANSLUCENT or OPAQUE. Contact lens Flag question: Question 12Question 12Tips1 ptsFrosted glass shower door Flag question: Question 13Question 13Tips1 ptsTinted car window Flag question: Question 14Question 14Tips1 ptsWater Flag question: Question 15Question 15Tips1 ptsStone wall Flag question: Question 16Question 16Tips1 ptsClear plastic bottle Flag question: Question 17Question 17Tips1 ptsClouds Flag question: Question 18Question 18Tips1 ptsWooden table Flag question: Question 19Question 19Tips1 ptsFace shield Flag question: Question 20Question 20Tips1 ptsTextbook Flag question: Question 21Question 21Tips1 ptsQuestion 21-25Directions:  Choose the letter of the best answer.  Which of the following is true about visible light? Group of answer choicesVisible light is radioactive and causes skin cancer.Visible light is not real.Visible light can never harm you.Visible light can’t be seen. Flag question: Question 22Question 22Tips1 ptsWhen is a shadow formed?Group of answer choiceswhen light is blockedwhen light passed an objectwhen light is absorbedwhen there is no light Flag question: Question 23Question 23Tips1 ptsWhat material are used in the tinted glass of cars?Group of answer choicestranslucentabsorbentopaquetransparent Flag question: Question 24Question 24Tips1 ptsWhat happens to light when it strikes translucent materials?Group of answer choicesThe light is both transmitted and absorbed.The light is blocked.The light is absorbed.The light passes through. Flag question: Question 25Question 25Tips1 ptsWhich of the following materials will allow light to pass through?Group of answer choicesplastic coverwax papercardboardblack art paper

Which of the following shows how to decrease the strength of an electromagnet?Group of answer choicesadd iron center to the coilincrease the number of loops of wire in the coildecrease the number of loops of wire in the coil

Which of the following statements is NOT true regarding an electromagnet?1 pointIts strength can be increased.Its magnetic properties are permanent.It works only when current flows in a conductor.It can be used to lift heavy loads.