Can an electric bell be operated with an AC source?
Answer: If an a.c. source is used in place of battery, the core of electromagnet will get magnetized, but the polarity at its ends will change. Since attraction of armature does not depend on the polarity of electromagnet, so the bell will still ring on pressing the switch.
What happens if you use AC current to power an electromagnet?
When connected to an AC voltage or current source, the electromagnet will be changing its flux density as the current fluctuates. The polarity of the magnet will also change as the current reverses direction every half cycle.
Will the bell ring if AC is used in place of DC?
If electric bell is connected to a.c. instead of d.c. then bell will ring intermittently.
How is the working of an electric bell affected if AC is used instead of DC?
How is the working of an electric bell affected if alternating current be used instead of direct current? … If an a.c. source is used in place of battery, the core of electromagnet will get magnetized, but the polarity at its ends will change.
On which effect of current does electric bell work?
Electric bell works on ‘magnetic effects of electric current.
What is the effect of current in an electric bell?
heating effect of electric current is utilised in an electric bell.
Do electromagnets need AC or DC?
Laminated core eliminates eddy current due to alternating power source. So true AC electromagnets can work with both AC and DC power source.
What can make an electromagnet stronger?
You can make an electromagnet stronger by doing these things:
- wrapping the coil around a piece of iron (such as an iron nail)
- adding more turns to the coil.
- increasing the current flowing through the coil.
Is AC or DC better for electromagnet?
Use AC if you want a motor, for example. As for stronger, DC is constant, while AC is alternating and falling in amplitude in the cycle, so DC will give the stronger field, except at the peak voltage of the AC cycle, when AC will be stronger.
What will happen if the elastic iron strip in the electric bell loses its flexibility?
What will happen if the elastic iron strip in the electric bell loses its flexibility? Answer: When the circuit breaks and the electromagnet loses its magnetism, the strip, due to loss of flexibility, will not return to its normal position of contact with the screw.