28/03/2020Magnetic 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. Which of the following is used to determine the direction of magnetic field in a current carrying conductor?Left hand thumb ruleRight hand thumb ruleLeft hand palm ruleRight hand palm rule2. What is an magnetosphere?Who cares?Its a beltThe 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.I dont know3. Which of the following statements about magnetic fields is not true?Magnetic field strength increases as the distance from the magnetic source increases.Magnetic fields are vector quantities.Magnetic fields have both magnitude and direction.Magnetic fields are regions in which magnetic forces can be detected.4. Magnetic fields move in a _____ path.zig-zagCircularbentstraight5. According to Flemming’s left hand rule, the thumb denotes?Direction of forceDirection of force as well as currentDirection of magnetic fieldDirection of current6. When a charged particle moves at right angles to the magnetic field, the variable quantity is?MomentumSpeedEnergy7. There are three different poleFalseTrue8. Electric currents are measured in...?NewtonsNanoteslasAmperesMicroteslas9. A charged particle moves with velocity v in a magnetic field B. The magnetic force on the particle is a maximum when v is zeroFalseTrue10. Field lines move from ____South to northWest to eastNorth to southEast to west11. Can we see magnetic flux lines?Depends on the strength of the fieldNoYesOnly when the field strength is very large12. What describes ΦM? The number of field lines that cross a certain areaMagnetic fluxABcosθAll of the above13. Which of these is positive for an eastward deviation of the field relative to true north? Celestial poleGeographical declinationMagnetic declinationGeodynamo14. What part of the earth is under the influence of the magnetic field ?HydrosphereMagnetosphereBiosphereLithosphere15. How is the intensity of the earth's magnetic field measured? GaussAmpereTeslaNewton16. How can a magnetic field be produced?Using a permanent magnet or electric currentUsing a temporary magnetElectric currentUsing a permanent magnet17. Which, among the following qualities, is not affected by the magnetic field?Change in magnetic fluxStationary chargeMoving chargeCurrent flowing in a conductor18. Weakest force in nature is?Electric forceMagnetic forceGravitational forceWeak force19. Which of these is most likely to attract? North polesUnlike polesLike polesSouth poles20. According to Flemming’s left hand rule, the index finger denotes?Direction of forceDirection of currentDirection of magnetic fieldDirection of force as well as current21. Magnetic Field lines move from ______South to northEast to westWest to eastNorth to south22. Which of these is most likely to repel?North polesUnlike polesLike polesSouth poles23. What causes magnetism?Earth's atmosphereGravityCharged electric particlesFriction24. 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 leaving the magnet.It is weaker.It is stronger.25. Which of these is not part of the magnetosphere?Bow shockMagnetosheathEastern tail lobeNorthern tail26 out of 25Time is Up!
