28/03/2020 Magnetic Fields(Senior Class Physics Study by Topics) 28/03/2020 0Comments by Gate Academy Welcome to your Magnetic Fields(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. Magnetic fields are made by...? Electric Currents Friction Heat Gravity 2. Which of these is most likely to attract? South poles Like poles Unlike poles North poles 3. Where are the two poles located at? None of the above Canadic Ocean & Off the cost of the Antarctica Asia & Russia 4. According to Flemming’s left hand rule, the thumb denotes? Direction of current Direction of magnetic field Direction of force as well as current Direction of force 5. Which, among the following qualities, is not affected by the magnetic field? Change in magnetic flux Stationary charge Current flowing in a conductor Moving charge 6. What is the study of past magnetic field of the Earth called? Spiral magnetism Quantal magnetism Magnetostratigraphy Paleomagnetism 7. The relation between the direction of force and the direction of magnetic field is ________ Same direction Unrelated Perpendicular Opposite direction 8. Electric currents are measured in...? Microteslas Newtons Amperes Nanoteslas 9. There are three different pole False True 10. Which of these is positive for an eastward deviation of the field relative to true north? Geodynamo Geographical declination Magnetic declination Celestial pole 11. Which of the following statements about magnetic fields is not true? Magnetic fields have both magnitude and direction. Magnetic fields are vector quantities. Magnetic fields are regions in which magnetic forces can be detected. Magnetic field strength increases as the distance from the magnetic source increases. 12. What happens when two north poles of magnets are placed together? They cancel each other out. They repel. The strength of the magnet is doubled. They attract. 13. A charged particle moves with velocity v in a magnetic field B. The magnetic force on the particle is a maximum when v is zero True False 14. Lines signify the strength of magnetic fields. If the lines are denser the magnetic field is...? Slower Stronger Normal Weaker 15. When a charged particle moves at right angles to the magnetic field, the variable quantity is? Momentum Speed Energy 16. Can we see magnetic flux lines? No Yes Only when the field strength is very large Depends on the strength of the field 17. 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. 18. How can a magnetic field be produced? Electric current Using a permanent magnet Using a permanent magnet or electric current Using a temporary magnet 19. 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 is Upward out of the page Toward the top of the page Toward the left edge of the page Toward the bottom of the page 20. Which of these is not part of the magnetosphere? Eastern tail lobe Northern tail Bow shock Magnetosheath 21. What continent houses the northern, magnetic pole? Australia Africa Asia Oceania 22. What is the magnetic field outside a solenoid? Half the value of the field inside Infinity Double the value of the field inside Zero 23. What causes magnetism? Charged electric particles Gravity Friction Earth's atmosphere 24. What part of the earth is under the influence of the magnetic field ? Hydrosphere Magnetosphere Biosphere Lithosphere 25. Where is the point where the magnetic field is vertical? Global pole Local pole South pole North pole 1 out of 25 Time is Up! Time's up
