Electricity Static Definitions

Question 1

Conductors are: {Definition}

Answer 1

Conductors are: materials with a very low resistivity.

Question 2

Insulators are: {Definition}

Answer 2

Insulators are: materials with a very high resistivity.

Question 3

Semiconductors are: {Definition}

Answer 3

Semiconductors are: materials with a resistivity between that of an insulator and a conductor.

Question 4

Coulomb is: {Definition}

Answer 4

Coulomb is: the charge if a current of 1 amp flows for 1 second.

Question 5

Coulomb’s Law is: {Formula}

Answer 5

Coulomb’s Law is: F = (1/4πe) (Qq/d^2)
[F=force, Q,q=charge, d=distance between charges, e=permittivity]

Question 6

Electric field is: {Definition}

Answer 6

Electric field is: the region around the charge where electric forces are felt.

Question 7

Electric field strength [intensity] is: {Formula}

Answer 7

Electric field strength [intensity] is:
E = F/q [N/C = force per coulomb or force per unit charge]
[E=electric field strength, F=force, q=charge]

Question 8

Potential Difference is: {Definition}

Answer 8

Potential Difference is: the work done in moving 1 coulomb of charge between two points [V].

Question 9

Volt is: {Definition} & {Formula}

Answer 9

Volt is: the potential difference between two points when 1 Joule of work is done in moving 1 coulomb of charge between the points [V].
V = W/q

Question 10

EMF is: {Definition}

Answer 10

EMF is: voltage applied to a circuit [V].

Question 11

Capacitance is: {Formula}

Answer 11

Capacitance is: C = Q/ V
[C: capacitance, Q: charge, V: voltage]

Question 12

1 Farad is: {Definition}

Answer 12

1 Farad is: 1 coulomb per Volt.

Question 13

Electric field line is: {Definition}

Answer 13

Electric field line is: the path a free positive charge would take.