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. Where is the point where the magnetic field is vertical? South poleGlobal poleNorth poleLocal pole2. Where are the two poles located at? None of the aboveAsia & RussiaCanadic Ocean & Off the cost of the Antarctica3. What causes magnetism?Earth's atmosphereCharged electric particlesGravityFriction4. According to Flemming’s left hand rule, the thumb denotes?Direction of force as well as currentDirection of currentDirection of forceDirection of magnetic field5. 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 leaving the magnet.It is entering the magnet.It is stronger.It is weaker.6. How is the intensity of the earth's magnetic field measured? TeslaNewtonAmpereGauss7. What is our best evidence that Earth has a magnetic field? A compass needle lines up with it.Earth's oceans all have currentsWinds blow from east to west.All things fall toward Earth's center.8. What is the magnetic field outside a solenoid?ZeroHalf the value of the field insideDouble the value of the field insideInfinity9. Magnetic fields are made by...? FrictionGravityElectric CurrentsHeat10. Can we see magnetic flux lines?YesOnly when the field strength is very largeNoDepends on the strength of the field11. A charged particle moves with velocity v in a magnetic field B. The magnetic force on the particle is a maximum when v is zeroTrueFalse12. Electric currents are measured in...?NanoteslasAmperesMicroteslasNewtons13. What is the study of past magnetic field of the Earth called? MagnetostratigraphyPaleomagnetismSpiral magnetismQuantal magnetism14. Magnetic Field lines move from ______East to westNorth to southSouth to northWest to east15. Which of the following statements correctly describes the behavior of magnets? Like poles attract each other, and unlike poles repel each other.None of the above.Like poles repel each other, and unlike poles attract each other.Both like and unlike poles can attract and repel each other depending on the surrounding materials.16. Which of these is positive for an eastward deviation of the field relative to true north? Magnetic declinationGeographical declinationGeodynamoCelestial pole17. What describes ΦM? The number of field lines that cross a certain areaABcosθMagnetic fluxAll of the above18. According to Flemming’s left hand rule, the middle finger denotes?Direction of force as well as currentDirection of forceDirection of currentDirection of magnetic field19. How can a magnetic field be produced?Electric currentUsing a permanent magnet or electric currentUsing a temporary magnetUsing a permanent magnet20. The ratio of magnetic force to electric force on a charged particle getting undeflected in a field is?204121. 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 pageToward the top of the pageUpward out of the pageToward the left edge of the page22. There are three different pole TrueFalse23. When a charged particle moves at right angles to the magnetic field, the variable quantity is?MomentumEnergySpeed24. Which of the following statements about the orientation and effects of Earth's magnetic field is not true? A compass needle that can rotate both perpendicularly and parallel to the surface of Earth, points down at the magnetic south pole.The geographic North Pole of Earth is near the magnetic south pole.A compass needle always indicates the direction of true north.The geographic South Pole of Earth corresponds to the magnetic north pole.25. The Earth Magnetic Field contains:Liquid ironIts magnetic is shaped like a barAll of the above2 poles26 out of 25Time is Up!