Difference between revisions of "Electricity"

Revision as of 17:40, 25 October 2026

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The Electricity page of the Reference Tables for Physical Science: Physics (2025 Edition) is the electricity equation sheet: seven equations with the meaning of their variables. Coulomb's law, the electric-field equation and W = qV support HS-PS2-4 and HS-PS3-5; Ohm's law, power, electrical energy and current support HS-PS3-6, together with the Circuit Symbols, Series Circuits and Parallel Circuits boxes on the same page. Every equation has its own row anchor.

What the electricity page shows

Electrostatics. F_e = kq₁q₂/r² is Coulomb's law, with k from the List of Physical Constants; it has the same inverse-square form as universal gravitation, which is the comparison HS-PS2-4 asks for. F_e = qE relates the force on a charge to the electric field strength (the 2006 edition wrote it as E = F_e/q), and W = qV gives the work done moving a charge through a potential difference (the 2006 edition's V = W/q). A charge in elementary charges is converted to coulombs with e from the constants list.

Circuits. V = IR is Ohm's law and I = Δq/t defines current. The power and energy lines give every combination of V, I and R: P = VI = I²R = V²/R, and W = Pt for the energy used in a time t. The 2006 edition also gave the resistance of a wire, R = ρL/A, with a table of resistivities; neither is on the 2025 tables.

Rows

A link or an {{Rt}} chip (Template:Rt) can point at one equation or constant with these anchors; each one lands on the table above:

coulomb – F_e = kq₁q₂/r²
electric-field – F_e = qE
w-qv – W = qV
electric-power – P = VI = I²R = V²/R
electrical-energy – W = Pt = VIt
ohm – V = IR
current – I = Δq/t

Regents Exam Questions

Released Regents questions that cannot be answered without this table, listed by exam. Each link opens the question with its answer key; the standard is the one the question assesses.

Exam	Cluster	Question	Standard	Row
June 2026 Physics Regents	Heat Exchange	Question 14	HS-PS3-4	W = Pt = VIt
	Flashlight Physics	Question 32	HS-PS3-6	V = IR
	Flashlight Physics	Question 33	HS-PS3-6	V = IR
	Flashlight Physics	Question 34	HS-PS3-6	W = Pt = VIt
	Charged Drops	Question 49	HS-PS2-4	F_e = qE

@@ Line 7: / Line 7: @@
 The '''Electricity''' page of the ''Reference Tables for Physical Science: Physics'' (2025 Edition) is the electricity equation sheet: seven equations with the meaning of their variables. Coulomb's law, the electric-field equation and ''W'' = ''qV'' support [[HS-PS2-4]] and [[HS-PS3-5]]; Ohm's law, power, electrical energy and current support [[HS-PS3-6]], together with the [[Circuit Symbols]], [[Series Circuits]] and [[Parallel Circuits]] boxes on the same page. Every equation has its own row anchor.
-<div style="display:flex;flex-wrap:wrap;gap:16px 32px;align-items:flex-start;">
+<span id="coulomb"></span><span id="electric-field"></span><span id="w-qv"></span><span id="electric-power"></span><span id="electrical-energy"></span><span id="ohm"></span><span id="current"></span>[[File:Electricity.png|760px|class=img-fluid|alt=Electricity from the Physics Reference Tables (2025 Edition)]]
-<div style="min-width:0;">
-{| class="wikitable" style="text-align:center;"
-! Equations
-|- id="coulomb"
-| style="padding:8px 16px;" | ''F''<sub>e</sub> = <span style="display:inline-block;vertical-align:middle;text-align:center;line-height:1.25;"><span style="display:block;border-bottom:1px solid currentColor;padding:0 3px;">''kq''<sub>1</sub>''q''<sub>2</sub></span><span style="display:block;padding:0 3px;">''r''<sup>2</sup></span></span>
-|- id="electric-field"
-| style="padding:8px 16px;" | ''F''<sub>e</sub> = ''qE''
-|- id="w-qv"
-| style="padding:8px 16px;" | ''W'' = ''qV''
-|- id="electric-power"
-| style="padding:8px 16px;" | ''P'' = ''VI'' = ''I''<sup>2</sup>''R'' = <span style="display:inline-block;vertical-align:middle;text-align:center;line-height:1.25;"><span style="display:block;border-bottom:1px solid currentColor;padding:0 3px;">''V''<sup>2</sup></span><span style="display:block;padding:0 3px;">''R''</span></span>
-|- id="electrical-energy"
-| style="padding:8px 16px;" | ''W'' = ''Pt'' = ''VIt'' = ''I''<sup>2</sup>''Rt'' = <span style="display:inline-block;vertical-align:middle;text-align:center;line-height:1.25;"><span style="display:block;border-bottom:1px solid currentColor;padding:0 3px;">''V''<sup>2</sup>''t''</span><span style="display:block;padding:0 3px;">''R''</span></span>
-|- id="ohm"
-| style="padding:8px 16px;" | ''V'' = ''IR''
-|- id="current"
-| style="padding:8px 16px;" | ''I'' = <span style="display:inline-block;vertical-align:middle;text-align:center;line-height:1.25;"><span style="display:block;border-bottom:1px solid currentColor;padding:0 3px;">Δ''q''</span><span style="display:block;padding:0 3px;">''t''</span></span>
-|}
-</div>
-<div style="min-width:0;">
-{| class="wikitable"
-! Variables
-|-
-| ''E'' = electric field strength
-|-
-| ''F''<sub>e</sub> = electrostatic force
-|-
-| ''I'' = current
-|-
-| ''k'' = electrostatic constant
-|-
-| ''P'' = power
-|-
-| ''q'' = charge
-|-
-| ''r'' = distance between centers
-|-
-| ''R'' = resistance
-|-
-| ''R''<sub>eq</sub> = equivalent resistance
-|-
-| ''t'' = time interval
-|-
-| ''V'' = potential difference
-|-
-| ''W'' = work ''or'' electrical energy
-|-
-| Δ = change
-|}
-</div>
-</div>
 == What the electricity page shows ==
@@ Line 66: / Line 15: @@
 == Rows ==
-Each row of the table has an anchor, so a link or an <code><nowiki>{{Rt}}</nowiki></code> chip ([[Template:Rt]]) can point at one equation or constant:
+A link or an <code><nowiki>{{Rt}}</nowiki></code> chip ([[Template:Rt]]) can point at one equation or constant with these anchors; each one lands on the table above:
 * <code>coulomb</code> – ''F''<sub>e</sub> = ''kq''<sub>1</sub>''q''<sub>2</sub>/''r''<sup>2</sup>
 * <code>electric-field</code> – ''F''<sub>e</sub> = ''qE''