COMPUTER HARDWARE COMPONENTS FUNCTIONS
EXTERNAL AND INTERNAL STORAGE DEVICES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
current
|
|
|
amps
|
|
|
ampules
|
|
|
volts
|
Detailed explanation-1: -The direction of magnetic field in a current carrying wire is perpendicular to the wire and in the direction your fingers curl if you wrap your right-hand around the wire with your thumb in the direction of current. Thus, if current is reversed, the direction of magnetic field is also reversed.
Detailed explanation-2: -The direction of magnetic polarity is determined by the direction of current flowing in the coil of wire. The direction that the wire is coiled around the core also determines the direction of magnetic polarity.
Detailed explanation-3: -If the direction of the current is reversed, the compass needle will move in the opposite direction because the polarity of the magnetic field has reversed.
Detailed explanation-4: -The electric current flowing through the straight conductor will produce magnetic field in concentric circles and hence the iron fillings around the conductor get attracted by that magnetic field and settle as those circles.