Electronic Principles
Which one of the following equations most directly determines the power dissipation of a resistance when you know the voltage drop and amount of resistance?

P = I2R
P = E2/R
I = P/E
P = IE
None of these

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
Which one of the following is a statement of KirchhofFs voltage law?

The algebraic sum of voltages in a loop is equal to zero
None of these
The voltage drop across a resistance is proportional to the value of resistance and the amount of current flowing through it
The total voltage in a parallel circuit is less than the value of the smallest voltage
The algebraic sum of voltages entering and leaving a point is equal to zero

ANSWER DOWNLOAD EXAMIANS APP

Electronic Principles
The core of an electromagnet is said to be in saturation when:

an increase in current through the coil causes no further increase in the mmf
None of these
changing the polarity of the current in the coil changes the polarity of the magnetic field around the core
frequent changes in the direction of current through the coil causes heating effects in the core material
the core is permitted to move freely within the coil

ANSWER DOWNLOAD EXAMIANS APP