Which of the following is not a component of electric bell?

Gong

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Ferromagnetic strip

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Low magnetic field permanent magnet to attract ferromagnetic strip

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None of the above

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Solution

The correct option is C Low magnetic field permanent magnet to attract ferromagnetic strip
Electric bell works on the mechanism of electromagnets i.e, temporary magnets, and no permanent magnet is used.
Temporary magnet allows the ferromagnetic strip to return back to its initial state as switch is released.

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Similar questions

Which of the following statements is not true?

(a) Paramagnetic substances are weakly attracted by magnetic field

(b) Ferromagnetic substances cannot be magnetised permanently

(d) Pairing of electrons cancels their magnetic moment in the diamagnetic substances

A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field because ..........

(a) all the domains get oriented in the direction of a magnetic field

(b) all the domains get oriented in the direction opposite to the direction of a magnetic field

(d) domains are not affected by a magnetic field

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