Difference between revisions of "Electricity"

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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.
 
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.
  
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<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)]]
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<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>
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[[File:Electricity.png|760px|class=img-fluid|alt=Electricity from the Physics Reference Tables (2025 Edition)]]
  
 
== What the electricity page shows ==
 
== What the electricity page shows ==
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'''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.
 
'''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.
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== Rows ==
 
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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:
 
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* <code>coulomb</code> – ''F''<sub>e</sub> = ''kq''<sub>1</sub>''q''<sub>2</sub>/''r''<sup>2</sup>
 
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* <code>electric-field</code> – ''F''<sub>e</sub> = ''qE''
 
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* <code>w-qv</code> – ''W'' = ''qV''
 
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* <code>electric-power</code> – ''P'' = ''VI'' = ''I''<sup>2</sup>''R'' = ''V''<sup>2</sup>/''R''
 
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* <code>electrical-energy</code> – ''W'' = ''Pt'' = ''VIt''
 
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* <code>ohm</code> – ''V'' = ''IR''
 
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* <code>current</code> – ''I'' = Δ''q''/''t''
 
  
 
== Regents Exam Questions ==
 
== Regents Exam Questions ==

Latest revision as of 17:52, 25 October 2026

⇱ All Physics Reference Tables (2025 Edition)
← The Electromagnetic Spectrum (Physics) Circuit Symbols →

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.

Electricity from the Physics Reference Tables (2025 Edition)

What the electricity page shows

Electrostatics. Fe = 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. Fe = qE relates the force on a charge to the electric field strength (the 2006 edition wrote it as E = Fe/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.

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