Electronic Principles
A transformer has a primary voltage of 120 V rms and a secondary voltage of 25 V rms. If the secondary current is 1A rms, what is the primary current?

None of these
7.8 mA
200 mA
208 mA
300 mA

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
What is the difference between a conductor and an insulator?

An insulator has an excessive number of free electrons, while a conductor has a few free electrons or none at all
An insulator allows current to flow much easier than a conductor does
A conductor allows current to flow much easier than an insulator does
The difference between conductors and insulators depends on how they are used
None of these

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
What is the difference between the kinds of charges for an electron and a proton?

None of these
An electron has a positive charge and a proton has no charge
An electron has a negative charge and a proton has no charge
An electron has a positive charge and a proton has a negative charge
An electron has a negative charge and a proton has a positive charge

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
What is a free electron?

None of these
An electron that has twice the amount of charge of a normal electron
An electron that costs nothing
An electron that has been freed from its parent atom
An electron that has no electrical charge

ANSWER DOWNLOAD EXAMIANS APP