A ballast resistor is used in which of the following systems?

Explanation: 

Battery Ignition System:

• A battery ignition system is used in the SI engine for supplying the power to the spark plug for the generation of spark to burn the air-fuel mixture in the SI Engine system.

The battery Ignition System consists of the following Main Parts:

• Battery
• Ballast Resistor
• Ammeter
• Ignition Switch
• Primary Winding
• Contact Breaker
• Capacitor
• Secondary Winding
• Distributor
• Spark Plug

Battery:

• The battery used here is a rechargeable lead-acid battery.
• It stores electrical energy and is used to provide electricity for ignition.
• The battery is charged by the dynamo which is driven by the engine.
• The battery is connected to the Ignition switch.

Ballast Resistor:

• The ballast resistor controls the current that passes through the primary winding.
• It is made up of Iron and Iron has the property to increase electrical resistance rapidly by an increase in temperature at a certain limit.
• This additional resistance resists the flowing current which controls the temperature of the ignition coil.
• It helps to maintain the temperature under prolonged conditions.

Ammeter:

• It is a measuring instrument used for measuring the current.

Ignition Switch:

• It is an important part of the system. It is used for ON and OFF the system.

Ignition Coil:

• An ignition coil is the main part of the battery ignition system which is used to step the voltage which means low to high and that is used for the generation of spark in the spark plug.
• An ignition Coil consists of a magnetic core or soft wire, and two electrical winding called primary and secondary winding.

Primary Winding:

• The primary winding has 200-300 turns. The current which is flowing through the primary winding creates a magnetic field.

Secondary Winding:

• The secondary winding has 21000 turns of 40 gauge wire. It is insulated to withstand high voltage.

Contact Breaker:

• The name itself indicates ‘contact breaker’ which means adding and breaking the primary circuit to the ignition coil.
• The function of the contact breaker is current flows in an ignition coil when it is closed and flows stops when it is open.

Capacitor:

• It is similar to an electric capacitor. Generally, It stores electrical energy in an electric field. In the capacitor, two metal plates are separated from each other through the air which is an insulating material.
• The main function of the capacitor is to prevent the arc from across the breaker point and if it is not connected to the primary circuit the induced voltage would cause an arc across the breaker point and that is very dangerous.

Distributor:

• The distributor also plays a vital role in this system. It provides ignition pulses to the individual spark plug-in sequences at the correct time.