Electricity 1

Question 1

charge distribution

Answer 1

resides on the outer surface

concentrates in corners

Question 2

electrostatic wind

Answer 2

movement of positive ions away from the sharp point of an object

Question 3

point discharge

Answer 3

air molecules near the sharp point of a charged point are ionised(split into positive and negative ions)

Question 4

electric field

Answer 4

the region around a charged particle in which its electric forces act

Question 5

test charge

Answer 5

tiny imaginary object with a positive charge

Question 6

electric field-opposite charges

Answer 6

electric field lines travel from positive to negative

Question 7

properties of elec field lines

Answer 7

do not intersect each other

go from posiive to negative

Question 8

elec fied examples

Answer 8

electrostatic precipitator(remove dust from chimneys)

Question 9

elec field strength using coulumbs law formula

Answer 9

E=Q/4πεd²

Question 10

coulumbs law

Answer 10

f proportional to q1q2/d²

f=force q1q2=magnitude of charges d=distance

Question 11

electric field strength

Answer 11

force acting on a test charge q placed at a point divided by the magnitude of the charge

units=N/C

Question 12

voltage

potential diff

Answer 12

work done/charge

units is volts=joule/coulumb

Question 13

Gold leaf electroscope use

Answer 13

Tell is an object is charged or neutral

Question 14

Electric field line

Answer 14

Path along which the test charge moves

Question 15

Capacitance

Answer 15

Ratio of charge q to the voltage of an object

C=q/V
Farad=coulomb/volt

Question 16

Use of capacitors

Answer 16

Tune a radio from one station to another

Blow flow of dc while allowing ac to flow