28/03/2020 Magnetic Fields(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Magnetic Fields(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. Magnetic field lines ___________ at the north pole.Either emerge or convergeConvergeNeither emerge nor convergeEmerge2. Which of these is not part of the magnetosphere?Northern tailEastern tail lobeMagnetosheathBow shock3. An electron moves in the plane of this paper toward the top of the page. A magnetic field is also in the plane of the page and directed toward the right. The direction of the magnetic force on the electron isToward the bottom of the pageUpward out of the pageToward the top of the pageToward the left edge of the page4. Field lines move from ____West to eastNorth to southSouth to northEast to west5. Where is the point where the magnetic field is vertical? Local poleGlobal poleSouth poleNorth pole6. Magnetic fields are made by...? FrictionElectric CurrentsGravityHeat7. Which of these is most likely to attract? South polesUnlike polesLike polesNorth poles8. The ratio of magnetic force to electric force on a charged particle getting undeflected in a field is?04219. What is the magnetic field outside a solenoid?Half the value of the field insideZeroDouble the value of the field insideInfinity10. Which of these is most likely to repel?Like polesNorth polesSouth polesUnlike poles11. The relation between the direction of force and the direction of magnetic field is ________PerpendicularUnrelatedSame directionOpposite direction12. According to Flemming’s left hand rule, the thumb denotes?Direction of currentDirection of force as well as currentDirection of forceDirection of magnetic field13. Magnetic fields move in a _____ path.straightCircularzig-zagbent14. The relation between the direction of current and the direction of magnetic field is ________PerpendicularSame directionUnrelatedOpposite direction15. Which of these is positive for an eastward deviation of the field relative to true north? Geographical declinationGeodynamoMagnetic declinationCelestial pole16. What is the study of past magnetic field of the Earth called? Spiral magnetismMagnetostratigraphyPaleomagnetismQuantal magnetism17. What describes ΦM? All of the aboveMagnetic fluxABcosθThe number of field lines that cross a certain area18. Which of the following statements correctly describes the behavior of magnets? Like poles attract each other, and unlike poles repel each other.Both like and unlike poles can attract and repel each other depending on the surrounding materials.None of the above.Like poles repel each other, and unlike poles attract each other.19. How can a magnetic field be produced?Using a permanent magnet or electric currentUsing a permanent magnetElectric currentUsing a temporary magnet20. Magnetic Field lines move from ______South to northEast to westWest to eastNorth to south21. How is the intensity of the earth's magnetic field measured? TeslaAmpereGaussNewton22. A charged particle moves with velocity v in a magnetic field B. The magnetic force on the particle is a maximum when v is zeroTrueFalse23. There are three different pole FalseTrue24. According to Flemming’s left hand rule, the index finger denotes?Direction of currentDirection of magnetic fieldDirection of force as well as currentDirection of force25. What is the process by which escapes convection currents from the earth's core called?GeodynamoMagnetosphereMicroteslasPaleomagnetism26 out of 25Time is Up!