electrostatics?
static electricity?
state coulomb’s law? mathematically?
what does this law give us or find us?
force of attraction
coulomb’s law?
constant of proportionality?
force b/w 2 charges when there is air or vacuum b/w them?
k depends upon?
k=?
coulomb’s law is applicable to?
what is a point charge?
can electron be considered point charge?
charged sphere behave as? reason? exception? why?
- applicable only to point charges & uniform spherical charge destribution.
- an imaginary charge located at a single point in space.
- yes
- behave as point charge for a point outside the spherical conductor
- cz
- only true if the spherical conductor is isolated.
strength of electric field of a spherical conductor?
direction of electric field for +ve & -ve sphere?
coulomb’s law for electric force exerted on charge q1 by q2 and q2 by q1?
define r12 and r 21
how F12=-F21
for like/unlike charges q1q2 will be? what force?
F12 & F21 are equal or no? regardless
coulomb force and gravitational force? comparison?
field force?
difference
superposition principle of force? example?
electric field?
help determine?
define electric field vector at a point? what if q is moved away?
electric field intensity?
vector/scalar? contains info abt?
the strength of the field at a point in space determines?
the direction with whch the positive test charge will move or tends to move is the direction of ?
- the force per unit positive test charge at any point is called efi at that point
- vector
- info abt field strength & its direction at that point
- determines the amount of force that a charge will experiance if placed at that point.
- electric field
define ef intensity at a point?
formula? symbol? SI unit? strength of the field is propotional to? Ef intensity is always directed from?
electric lines?
EFL of +ve and -ve charge?
electric dipole? FL start from?
draw diagram
high density of lines b/w charges indicate? why? no of line at + ve charge must equate
field lines of 2 +ve charges? neutral points? what abt 2
-ve charges?
field is ____ b/w the charges?
points where resultant intensity is zero
same but directions are reversed
weaker
fringing field? how is it formed?
do field line intersect?
for the field lines to start & end at infinity?
what gives the direction of intensity? what do the arrows indicate?
electric lines orginiate from?
intensity of electric field is proportional to?
when are lines of force close in the region?
what explains attraction b/w opp charged bodies?
potential gradient? potential difference? simply?
derive for potential gradient?
what does the equation show?
how is the unit of electric field V/m?
what is negative sign for?
motion of charged particle in an electric field?
charge +q?
if the charge is allowed to move freely in an electric field, it will move from +ve plate to -ve plate & gain K.E
if the charge is moved against the electric field by an external force.
if the charge is relaed form pint
ferrofluid?
draw electric field lines for positive, negative & 2 opposite charges
2 +ve charges?
pg 188
explain how a faraday cage works?
