Difference between revisions of "Electricity"

Latest revision as of 17:52, 25 October 2026

⇱ All Physics Reference Tables (2025 Edition)
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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.

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;">
+<div id="coulomb"></div><div id="electric-field"></div><div id="w-qv"></div><div id="electric-power"></div><div id="electrical-energy"></div><div id="ohm"></div><div id="current"></div>
-<div style="min-width:0;">
+[[File:Electricity.png|760px|class=img-fluid|alt=Electricity from the Physics Reference Tables (2025 Edition)]]
-{| 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 64: / Line 14: @@
 '''Circuits.''' ''V'' = ''IR'' is Ohm's law and ''I'' = Δ''q''/''t'' defines current. The power and energy lines give every combination of ''V'', ''I'' and ''R'': ''P'' = ''VI'' = ''I''<sup>2</sup>''R'' = ''V''<sup>2</sup>/''R'', and ''W'' = ''Pt'' for the energy used in a time ''t''. The 2006 edition also gave the resistance of a wire, ''R'' = ρ''L''/''A'', with a table of resistivities; neither is on the 2025 tables.
-== 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:
-* <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''
-* <code>w-qv</code> – ''W'' = ''qV''
-* <code>electric-power</code> – ''P'' = ''VI'' = ''I''<sup>2</sup>''R'' = ''V''<sup>2</sup>/''R''
-* <code>electrical-energy</code> – ''W'' = ''Pt'' = ''VIt''
-* <code>ohm</code> – ''V'' = ''IR''
-* <code>current</code> – ''I'' = Δ''q''/''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.
+<div style="overflow-x:auto;">
 {| class="wikitable" style="width:100%; text-align:center"
 ! style="padding: 0.5em 1.5em;" | Exam
@@ Line 111: / Line 52: @@
 | style="background-color:white;" | ''F''<sub>e</sub> = ''qE''
 |}
+</div>