Electricity

Level 2 External

what is the letter/symbol used for total charge?

Q

what is the letter/symbol used for individual charge?

q

what is the letter/symbol used for number of individual charges?

n

charge is measured in _______, _

coulombs, C

electrical charge is generated by f_______ or i_______

friction, induction

electrons cannot flow within an ______, but only in a ________

insulator, conductor

an _______ field is an area of space where an object experiences an electric _______

electric, force

an electric field flows in the direction from ______ to ______ charge

positive, negative

______ is measured using formula Q = nq

charge

the ______ of an electric _______ is measured using the formula E = V/d

strength, field

what is the letter/symbol used for electric field strength?

E

what is the letter/symbol used for voltage/potential difference?

V

what is the letter/symbol used for distance?

d

electric field strength is measured in ____ or N/C

V/m

distance is measured in _______, __

metres, m

an _________ force is a push or pull experienced by a _______ particle due to an electric field

electrostatic, charged

the _____ experienced by a ______ particle in an ______ field is expressed using the formula F = Eq

force, charged, electric

what is the letter/symbol used for electrostatic force?

F

electrostatic force is measured in ______, _

newtons, N

a _______ particle in an electric field will accelerate in a _______ line in direction of electrostatic force

stationary, straight

a particle moving ________ to an electric field will accelerate along a ______ path, where ___ (Vh/Vv) remains the same and ___ (Vh/Vv) changes

perpendicular, parabolic, Vh, Vv

electrostatic force remains ______ in a ______ field, since q and E do not change

constant, uniform

in a uniform field, F = Eq and F = ma, so ___ = ___. this relationship is used in millikan’s oil drop experiment

Eq = ma

acceleration due to an electric field causes a change in _______ - use the formula ΔEp = qEΔd

energy

________ of energy applies to moving charged particles through an electric field, so -ΔEp = ΔEk = ½mv²

conservation

in a circuit, electrons _____ energy from power supplies and ______ energy across components

gain, lose

______ is the amount of charge carried by electrons passing a point in a second

current

what is the letter/symbol used for current?

I

current is measured in ______, _

amperes, A

current is measured using an _____ connected in ______ using the formula I = q/t

ammetre, series

is the ideal resistance of an ammeter zero, or infinite?

zero

is the ideal resistance of a voltmeter zero, or infinite?

infinite

voltage is measured using a _____ connected in ______ using the formula V = E/Q

voltmeter, parallel

________ is the difference in electric potential between different points around a circuit; the amount of energy in one coulomb of charge

voltage

voltage is also called _______ _______

potential difference

voltage is the ______ of a circuit provided by the power supply

energy

does current or voltage stay the same in a series circuit?

current

does current or voltage change in a series circuit?

voltage

does current or voltage stay the same in a parallel circuit?

voltage

does current or voltage divide in a parallel circuit?

current

current divides across parallel branches depending on the ratio of _______ across branches

resistance

_______ controls the amount of current flowing through a circuit, and is inverse to current

resistance

_____’s law is V = IR

ohm

what is the letter/symbol used for resistance?

R

resistance is measured in _____, Ω

ohms

in _____, R_total = R₁ + R₂ + R₃

series

in _____, 1/R_total = 1/R₁ + 1/R₂ + 1/R₃

parallel

total resistance in parallel is always _______ (smaller/larger) than that of each individual resistor

smaller

in a non-ohmic conductor, voltage increases, so current increases, and ____ is produced; therefore, resistance increases

heat

resistance can be calculated without current using the formula _____, by combining V = IR and P = VI

R = V²/P

P = IR can be combined with ohm’s law, V = IR, to derive formulas P = _²/R or P = _²R

V, I

_____ is the rate at which energy is consumed by a circuit/component

power

what is the letter/symbol used for power?

P

power is measured in _____, _ or J/s

watts, W

voltage is measured in _____, _ or J/C, using the formula P = IV or P = ΔE/Δt

volts, V

brightness of a lamp depends on ________

power