MCQ Chapter 19 General Science Class 7 Maharashtra Board MCQ For All Chapters – General Science Class 7Properties of a Magnetic Field 1. What happens when a bar magnet is brought near pins from a distance?The pins repel the magnetThe pins are pulled toward the magnetThe pins remain stationaryThe pins dissolveQuestion 1 of 202. What did Michael Faraday name the lines going from one pole of a magnet to another?Magnetic fieldMagnetic lines of forceMagnetic intensityMagnetic polesQuestion 2 of 203. What is the region around a magnet where magnetic force acts called?Magnetic poleMagnetic fieldMagnetic lineMagnetic intensityQuestion 3 of 204. How is the intensity of a magnetic field gauged?By the size of the magnetBy the number of lines of force per unit areaBy the weight of the magnetBy the color of the linesQuestion 4 of 205. Where is the magnetic field intensity highest?Where lines of force are sparseWhere lines of force are concentratedAt the center of the magnetFar from the magnetQuestion 5 of 206. What is a property of magnetic lines of force?They run from south to northThey intersect each otherThey are in a state of tensionThey attract each otherQuestion 6 of 207. Why do like poles of magnets repel each other?Because lines of force attract each otherBecause lines of force repel each otherDue to gravitational forceBecause of their colorQuestion 7 of 208. Can magnetic fields pass through cardboard?No, they are blocked completelyYes, but the intensity decreasesYes, with no change in intensityOnly if the cardboard is thinQuestion 8 of 209. What happens to the magnetic field intensity when it passes through water?It increasesIt remains unchangedIt decreasesIt disappearsQuestion 9 of 2010. What is magnetic force?A force that requires direct contactA force that acts at a distanceA force that only affects non-metalsA gravitational forceQuestion 10 of 2011. How does a magnetic force differ from gravitational force?Magnetic force only attracts, gravity only repelsMagnetic force acts at a distance, gravity requires contactMagnetic force can attract or repel, gravity only attractsMagnetic force is weaker than gravityQuestion 11 of 2012. What is an electromagnet?A permanent magnetA magnet made by electric currentA naturally occurring magnetA non-magnetic metalQuestion 12 of 2013. Where are metal detectors commonly used?Only in homesAt airports and bus stationsOnly in schoolsExclusively in minesQuestion 13 of 2014. Why is repulsion considered the real test for identifying a magnet?Because only magnets repel like polesBecause attraction is strongerBecause repulsion is weakerBecause all objects attract magnetsQuestion 14 of 2015. Which alloy is used for making industrial magnets?SteelNipermagCopperBrassQuestion 15 of 2016. What indicates the intensity of a magnetic field in the exercise?The size of the magnetThe lines of forceThe weight of iron filingsThe color of the magnetQuestion 16 of 2017. Why is a magnetic needle used in a compass?To measure distanceTo point toward Earth’s magnetic polesTo detect metalTo generate electricityQuestion 17 of 2018. How can the direction of a magnetic field be determined?By the color of iron filingsBy the pattern of magnetic lines of forceBy the weight of the magnetBy the size of the pinsQuestion 18 of 2019. What did merchants of olden times likely use magnets for?To generate powerFor navigationTo detect metalsTo lift objectsQuestion 19 of 2020. What is a key property that explains attraction between opposite poles?Lines of force repel each otherLines of force are in tensionLines of force intersectLines of force are sparseQuestion 20 of 20 Loading...
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