Magnetism and Right Hand Rule

the direction of magnetic field can be shown by a __________.

• compass

• pin

• needle

• clock

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Choose the correct methods when using right hand grip rule.

• thumb follow the direction of electric current

• curled finger shows the direction of the magnetic field.

• magnetic field lines cross with one another

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The area around a magnet which the magnetic force can be detected is called :

• force field

• magnetic field

• neutral field

• area field

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When lines of magnetic field are closer, the strength of magnetic field is ___________________

• weaker

• stronger

• change

• neutral

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Magnetic field line start from _______________ and end at _____________

• north pole, south pole

• south pole, north pole

• north pole, north pole

• south pole, south pole

The interaction between an electric field and a magnetic field produces _______________

• electromagnetic force

• compass

• wire conductor

• neutral force

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The strength of a magnetic field in an electromagnet increases if :

• electric current decrease

• electric current increases

• number of turns of the coil decreases

• number of turns of the coil increases

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What do the lines around this magnet represent?

• North Pole

• South Pole

• Magnetic Declination

• Magnetic Field

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Which of the following correctly describes the right-hand rule for determining the direction of the magnetic field around a current-carrying wire?

• Point your thumb in the direction of the current, and your fingers will curl in the direction of the magnetic field.

• Point your thumb in the direction of the magnetic field, and your fingers will curl in the direction of the current.

• Point your index finger in the direction of the current, and your thumb will point in the direction of the magnetic field.

• Point your index finger in the direction of the magnetic field, and your thumb will point in the direction of the current.

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What happens to the magnetic field strength if the current in a wire is doubled?

• It remains the same.

• It is halved.

• It is doubled.

• It is quadrupled.

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