## How to use a multimeter

Multimeter A multimeter is a measuring device that combines various measurement functions such as voltage, current, and resistance. Multimeters are classified into analog and digital multimeters according to how they operate. Analog multimeters were used a lot in the past, … more

## Structure of an ammeter

Ammeter The strength of the current in the electrical circuit is measured using an ammeter. There is a rotor with a coil wound inside the ammeter. When the current flows through the ammeter, the coil and the rotor will have … more

## Serial Parallel Circuit 3

Resistance Electrical resistance is a property of a material that impedes the flow of electric current. The unit of resistance is the ohm(Ω). When a voltage of 1V is applied, the conductor’s resistance that allows a current of 1A is … more

## Rectifier Circuit

Diode Diodes are electronic components that pass current in only one direction. The direction in which current can flow through the diode is called ‘forward,’ and the direction in which current cannot flow through the diode is called ‘reverse.’ If … more

## Diode

Diodes are electronic components that pass current in only one direction. The direction in which current can flow through the diode is called ‘forward,’ and the direction in which current cannot flow through the diode is called ‘reverse.’ If you … more

## DC Motor

Motor An electric motor is a device that converts electrical energy into mechanical energy by utilizing the force received by a conductor through which a current flows in a magnetic field. Electric motors are used in many fields, from small … more

## Homopolar Motor

Assuming that the current flowing in the wire is in the X-direction, the magnetic field is in the Y direction. Then, what direction is the electromagnetic force? ‘Homopolar motor’ refers to a motor operated by using only one polarity of … more

## Serial Parallel Circuit 2

In parallel circuit, The current splits up when it comes to a branch. The current in all the branches adds up to the current in the main part of the circuit. If one bulb breaks, the bulbs in the other … more

## Parallel Circuit

Parallel Circuit is a closed circuit in which the current follows more than one pathway. In a parallel circuit, if one bulb breaks, the bulbs in the other branch stay on. In a parallel circuit, the current split up when … more

## Serial Parallel Circuit

In parallel circuit, The current splits up when it comes to a branch. The current in all the branches adds up to the current in the main part of the circuit. If one bulb breaks, the bulbs in the other … more

## Charge Conservation

In the serial circuit, The current is the same everywhere. In the parallel circuit, The current splits up when it comes to a branch. The current in all the branches adds up to the current in the main part of … more

## Magnetic Field around a Circular Wire

The magnetic field is the area surrounding a magnet in which the magnetic force exists. The magnetic field is also formed around the conductor through which the current flows. This is electromagnetism. The direction of the magnetic field can be … more