6. We make use of
the circuit
to open
8. Fill in the blanks.
1. A battery is made up of
cells
2 Alloy named
is used to
make strong electromagnets.
3. A fuse wire is invariably of a
melting point.
4 An electromagnet uses
effect of electricity.
A magnet attracts only the
metals.
7. Electric bell is based on the principle of
effect of the current
8. AINiCo is an alloy of
nickel and cobalt.
9. Filament in an incandescent bulb is made
of
10. Nichrome is an alloy of
and chromium.
Answers
Answer:
1. A battery consists of some number of voltaic cells. Each cell consists of two half-cells connected in series by a conductive electrolyte containing metal cations.
2.The alloy 'Alnico' is used for making permanent magnets. It is an alloy of aluminium, nickel, cobalt and iron.
3.it has low melting point
4.An electromagnet works on the magnetic effect of current. An electromagnet consists of a long coil of insulated copper wire wound around an iron rod. When the two ends of the coil are connected to a cell, a current passes through the coil and produces a magnetic effect. This magnetic effect magnetises the iron rod.
Some metals are what scientists call ferromagnetic, which means they are permanently magnetized by a magnet. ... Others are paramagnetic, meaning they are only temporarily magnetized, and others are diamagnetic, meaning they experience a weak repulsion of a magnetic field.
7.Current flows through a closed circuit. The electric bell is based on the magnetic effect of current.
8.Alnico is an alloy made mainly from a combination of Aluminium, Nickel, Cobalt and Iron plus varying levels of Copper, Titanium and Niobium. The exact chemical composition within Alnico grade depends on the grade of Alnico.
9.The filament is the part of the light bulb that produces light. Filaments in incandescent light bulbs are made of tungsten. When electric current goes through the filament, the filament glows. It may also be known as the electron emitting element in a vacuum tube.
10.Nichrome is a non-magnetic alloy of nickel and chromium. Nichrome is widely used in heating elements. It is wound in wire coils to a certain electrical resistance, and current passed through to produce heat.