Electricity and Magnetism

Neutrons have no electric charge

An atom has equal number of protons and electrons, it contains equal amount of positive and negative charge and becomes electrically neutral.

A closed electrical path in which electric charge can flow is defined as an electric circuit.

In insulators are electrons held tightly by atoms due to which electrons are unable move easily.

When lightning strikes a lightning rod, the electric charges in the lighting flash flow through the connecting wire into the ground

Increasing the resistance in the circuit increases the number of collision that occurs every second as electrons flow.

In a series circuit, devices are connected so these is only one closed path for current to flow if any part of this path is broken, current will no larger flow in the circuit.

Not only is a current carrying wire surrounded by a magnetic field, but so as any electric charge in motion.

The voltage supplied by the radio is 9.0V

Electric resistance results from the collision between the electrons flowing in a current and the atoms and other charges in the circuit.

When use walk across carpet and touch a metal door knob, we might feel an electric shock or a spark. The spark is an example of electric discharge.

If a loop of wire is rotated within a magnetic field, the motion of the wire loop with respect to the magnetic field produces an electrical field in the wire.

Most of the domains in a permanent magnet are oriented along a single direction.

The chemical reactions cause the negative terminal to become negatively charged and the positive terminal to become positively charged. The negative and positive charges on the battery terminals produce the electric field in the circuit that causes electrons to flow.

The magnetic forces between two magnetic poles are attractive for unlike poles and repulsive for like poles.

A single magnetic domain may contain trillions of atoms, but it is still too small to be seen with our naked eyes.

A current carrying wise wrapped around an iron core is an electromagnet.

Nickel is a magnetic substance.

Common pins are typically made of steel, which is an alloy containing iron. Iron and its alloys (like steel) are ferromagnetic materials that are strongly attracted to magnets. Silver is not magnetic, glass is non-magnetic, and combs are typically made of plastic (also non-magnetic).

Opposite pole attract each other.

The voltage between any two points in the circuit increases when electric field in circuit increases. The SI unit for voltage is volt, & has the symbol V.

Electromagnet is right as when the bell switch is put ON current flows through the magnet and makes it active electromagnet.

A freely suspended magnet aligns itself with Earth's magnetic field. The North Pole of a magnet points toward Earth's geographic North (which is actually a magnetic South pole). Therefore, the South Pole of the magnet points toward Earth's geographic South. This is why compass needles work for navigation.