A dielectric, insulating material, or an extremely bad conductor of electrical current. Due to the absence of loosely bound, or free, electrons that could wander through the material, unlike metals, dielectrics practically do not conduct current when exposed to an electric field. Electric polarization takes place instead.
<h3>What is an Electric field?</h3>
- An electric field is an electrical property associated with every point in the space of any form of charge. An electric field is also described as the electric force per unit charge.
- Variable magnetic fields or electric charges are frequently the cause of electric fields. Volts per meter, a unit used in the SI, express electric field strength.
- The force acting on the positive charge is assumed to be exerted in the direction of the field. The electric field is directed radially inwards toward the negative point charge and radially outwards from the positive charge.
- Electric charge or magnetic fields with variable amplitudes can produce an electric field. The attraction forces that keep together atomic nuclei and electrons at the atomic scale are brought on by the electric field.
The phenomenon of polarization when a dielectric slab is subjected to an electric field:
A dielectric, insulating material, or an extremely bad conductor of electrical current. Due to the absence of loosely bound, or free, electrons that could wander through the material, unlike metals, dielectrics practically do not conduct current when exposed to an electric field. Electric polarization takes place instead.
To learn more about the electric field, refer to:
brainly.com/question/14372859
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Angular acceleration = (change in angular speed) / (time for the change)
Change in angular speed = (speed at the end) - (speed at the beginning)
For this fan, speed at the end = 7700 rpm, speed at the end = 0 .
Change in angular speed = -7700 rpm
Angular acceleration = (-7700 rpm) / (2.5 sec)
<em>Angular acceleration = -3,080 rev per minute / sec</em>
That's a perfectly good and true answer to the question, but the units are ugly. We really need to fix the units, and convert them into something prettier before we hand in this assignment.
1 rev = 2π radians, and
1 minute = 60 seconds .
So
Angular acceleration =
(-3,080 rev/min-sec) · (2π rad/rev) · (1 min/60 sec)
AngAccel = (-3,080 · 2π · 1 / 60) · (rev·rad·min / min·sec·rev·sec)
AngAccel = ( -102 and 2/3 · π) · (rad/s²)
<em>AngAccel = -322.5 radian/s²</em>
I believe the answer is the second one.
