Wednesday
July 30, 2014

Homework Help: physics

Posted by anonymous on Saturday, March 12, 2011 at 10:15am.

Using the circuit for an electric bell,
a) Explain why the bell won't work if the elctromagnet is replaced with a permanent magnet. (2 marks)
b)Explain why the core of the electromagnet used in an electric bell must not be made from steel. (3 marks)

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - Using the circuit for an electric bell, a) Explain why the bell won't...
Nautical Studies - IRPCS - Vessel over 100m aground in fog - sound signals. ...
geography - I couldn't find where bell lived and worked when i googled bell. ...
Physics - Fluids - A cylindrical diving bell 3.0 m in diameter and 4 m tall with...
dog behavior - please check my answer thanks In Pavlov's experiment with the ...
physics - At a carnival, you can try to ring a bell by striking a target with a...
math - a deep sea diving bell is being lowered at a constant rate. after 8 ...
Physics - A cylindrical diving bell 4.0m tall, with an open bottom, is lowered ...
science(check answers) - 1.D 2.A 3.A 4.im not sure please help 5.false One light...
Physics - A cylindrical diving bell 5 m in diameter and 10 m tall with an open ...

Search
Members