Inductor

What is the unit of inductance?

• Volt
• Ampere
• Watts
• Henry

Inductor stores energy in the form of

• Electric field
• Electromagnetic field
• Magnetic field
• None of the above

Choose the factors affecting inductance.

• Number of coil turns

• Spacing between adjacent core sheets

• Cross sectional area of the connection wire

• Types of iron core material

The ability of an inductor to concentrate a magnetic field is called ____________.

• impedance
• capacitance
• inductance
• Resistance

An inductor opposes any change in

• Voltage
• Current
• Frequency
• None of the Above

Inductor consists of a coil of wire which is capable to store electrical energy in the form of magnetic field when electric ___ flows through it.

• current

• resistance

• voltage

• power

Eddy-current causes power loss in an inductor in the form of ___.

• power

• velocity

• heat

• friction

Which of the following are applications of an inductors?

• Tuning circuits for radio and television

• Capacitors for power grids

• Current-limiting device (Reactor) in power circuits

• Ballasts or chokes for fluorescent lamps and other pressure-vapour lamp circuits

Identify the part shown.

• air core inductor

• iron core inductor

• variable inductor

• wire inductor

Identify the part shown.

• air core inductor

• iron core inductor

• variable inductor

• wire inductor