Fundamentals of Electrical & Electronics Engg.

The direction of induced emf can be found out by

• Lenz's law

• Fleming's left hand rule

• Laplace law

• Faraday's law

Inductance is inversely proportional to

• Resistance

• Reluctance

• Turns

• Magnetic path

The unit of permeability is

• H/m

• V/m

• C/m

• F/m

The tolerance of no colour is

• 0%

• 5%

• 10%

• 20%

A capacitor consists of two

• Insulators separated by a dielectric

• Conductors separated by an insulator

• Ceramic plates and one mica disc

• Silver coated insulators

The area around a magnet is called the .....

• attraction zone

• work area

• magnetic field

• hot zone

Kirchhoff's current law is based on the law of conservation of

• charge

• energy

• mass

• momentum

You can increase the strength of an electromagnet by:

• Decreasing the battery charge

• Decreasing the amount of loops in the solenoid

• Winding the coils more closely

• Winding the coils more loosely

Which is the device in DC Generators that converts AC current into DC current

• brushes
• commutator 
• stator
• armature

A BJT has

• one pn junction

• two pn junctions

• three pn junctions

• four pn junctions