Magnetic Field and Field Lines
Physics ⇒ Electricity and Magnetism
Magnetic Field and Field Lines starts at 8 and continues till grade 12.
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See sample questions for grade 8
A student places a compass near the center of a bar magnet and observes that the needle does not point in a definite direction. Explain why.
Describe how the pattern of magnetic field lines changes when two opposite poles of two bar magnets are brought close together.
Describe how the strength of the magnetic field changes as you move from the center of a bar magnet to its pole.
Describe what happens to a compass needle when it is placed near a bar magnet.
Describe what happens to the magnetic field lines when two like poles of two bar magnets are brought close together.
Explain why a magnetic field is considered a vector quantity.
Explain why iron filings align themselves along magnetic field lines when sprinkled around a magnet.
A student places a compass near the center of a bar magnet and observes that the needle does not point in a definite direction. Explain why.
Which of the following best describes magnetic field lines? (1) They are real lines that can be seen with the naked eye. (2) They are imaginary lines used to represent the direction and strength of a magnetic field. (3) They are electric currents. (4) They are lines of force in an electric field.
Which of the following best describes the direction of magnetic field lines inside a bar magnet? (1) From north to south (2) From south to north (3) In random directions (4) They do not exist inside the magnet
Which of the following best describes the shape of the magnetic field lines around a straight current-carrying conductor? (1) Straight lines (2) Circular loops centered on the wire (3) Zigzag lines (4) Random lines
Which of the following instruments is used to detect the direction of a magnetic field? (1) Voltmeter (2) Ammeter (3) Compass (4) Thermometer
Fill in the blank: Magnetic field lines are ________ where the magnetic field is strongest.
Fill in the blank: The area around a magnet where its magnetic force is strongest is called the ________.
Fill in the blank: The earth’s magnetic field protects us from harmful ________ from the sun.
Fill in the blank: The magnetic field is ________ at the poles of a bar magnet than at its center.
True or False: Magnetic field lines always form closed loops.
True or False: Magnetic field lines are always parallel to each other.
True or False: Magnetic field lines are more concentrated at the poles of a magnet.
True or False: Magnetic field lines can be seen with the naked eye.
