Basic Electricity MCQs

Electromagnetic waves are transverse in nature is evident by

Polarization
Interference
Reflection
Diffraction

Answer

For a wave propagating in a medium, identify the proper that is independent of others

Velocity
Wavelength
Frequency
All of these

Answer

A laser beam is used for locating distant objects

It is monochromatic
It is coherent
It is not absorbed
It has small angular spread

Answer

One ampere is equivalent to :

1 coulomb second
1 coulomb second-1
1 joule second
1 joule/second

Answer

When the length and area of cross-section both are doubled then its resistance

will become half
will be doubled
will remain the same
will become four times

Answer

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