Question

1) Difference between
resistance and rasisator?

2) Difference between cell and
battery ?

3) Name two factors which
help the strenth of a
electro-magnet.

4) what is fuse? why do we
use fuse on current ?

5) Describe the working of an
electric bell​

Answer 1

Answer:

1 Resistance is the property of a conductor, which determines the quantity of current that passes through it when a potential difference is applied across it. A resistor is a electrical componet with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc.

2A cell is a single unit device which converts chemical energy into electric energy. A battery usually consists of group of cells. A battery is either a primary battery or a secondary battery meaning it is rechargeable or non-chargeable. A cell is usually light and compact as it has a single unit.

3 Then to summarise, the strength or intensity of a coils magnetic field depends on the following factors. The number of turns of wire within the coil. The amount of current flowing in the coil. The type of core material.

4 A fuse is a small, thin conductor designed to melt and separate into two pieces for the purpose of breaking a circuit in the event of excessive current. A circuit breaker is a specially designed switch that automatically opens to interrupt circuit current in the event of an overcurrent condition.

5 An electric bell is a mechanical or electronic bell that functions by means of an electromagnet. ... When an electric current flows through the coils, the electromagnet creates a magnetic field which pulls the armature towards it, causing the hammer to strike the bell.