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. According to Flemming’s left hand rule, the middle finger denotes?Direction of currentDirection of force as well as currentDirection of magnetic fieldDirection of force2. The ratio of magnetic force to electric force on a charged particle getting undeflected in a field is?21043. Magnetic fields move in a _____ path.zig-zagCircularstraightbent4. Which of these is not part of the magnetosphere?MagnetosheathNorthern tailEastern tail lobeBow shock5. The relation between the direction of current and the direction of magnetic field is ________Opposite directionUnrelatedSame directionPerpendicular6. Which, among the following qualities, is not affected by the magnetic field?Stationary chargeCurrent flowing in a conductorChange in magnetic fluxMoving charge7. What is the strength of magnetic field known as ________Magnetic flux densityMagnetic strengthFluxDensity8. Since more magnetic field lines cross the area that is near the pole of a magnet, what does this indicate about the magnetic field strength in that location?It is entering the magnet.It is weaker.It is leaving the magnet.It is stronger.9. What continent houses the northern, magnetic pole? OceaniaAustraliaAsiaAfrica10. The Earth Magnetic Field contains:2 polesAll of the aboveIts magnetic is shaped like a barLiquid iron11. What causes magnetism?GravityCharged electric particlesEarth's atmosphereFriction12. What is an magnetosphere?Its a beltI dont knowThe outer region of the earth's ionosphere, where the earth's magnetic field controls the motion of charged particles, as in the Van Allen belts.Who cares?13. Can we see magnetic flux lines?YesNoDepends on the strength of the fieldOnly when the field strength is very large14. What is the magnetic field outside a solenoid?ZeroInfinityHalf the value of the field insideDouble the value of the field inside15. The relation between the direction of force and the direction of magnetic field is ________PerpendicularUnrelatedOpposite directionSame direction16. Magnetic Field lines move from ______East to westNorth to southSouth to northWest to east17. Which of the following statements about the orientation and effects of Earth's magnetic field is not true? The geographic North Pole of Earth is near the magnetic south pole.A compass needle that can rotate both perpendicularly and parallel to the surface of Earth, points down at the magnetic south pole.The geographic South Pole of Earth corresponds to the magnetic north pole.A compass needle always indicates the direction of true north.18. What part of the earth is under the influence of the magnetic field ?BiosphereHydrosphereMagnetosphereLithosphere19. What is the process by which escapes convection currents from the earth's core called?PaleomagnetismMagnetosphereMicroteslasGeodynamo20. Which of these is positive for an eastward deviation of the field relative to true north? GeodynamoCelestial poleGeographical declinationMagnetic declination21. Weakest force in nature is?Gravitational forceMagnetic forceWeak forceElectric force22. Which of these is most likely to attract? South polesNorth polesLike polesUnlike poles23. Lines signify the strength of magnetic fields. If the lines are denser the magnetic field is...?StrongerWeakerNormalSlower24. According to Flemming’s left hand rule, the thumb denotes?Direction of currentDirection of magnetic fieldDirection of forceDirection of force as well as current25. 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 isUpward out of the pageToward the top of the pageToward the left edge of the pageToward the bottom of the page26 out of 25Time is Up! Time's up
