75-Archetype SyllabusPhysics • ARCH-P-02 • Spec P1

Full 6-Card Lesson 15-Question Timed Drill

UAT-UK SPEC CODE: P1 (Electricity)ASSUMED MATHS 1 PREREQUISITE: M1.2FREQUENCY: MEDIUM

Electrical Power Dissipation (P = IV = I^2R = V^2/R), Grid Efficiency & Energy (E = VIt)

Deconstructed from 11 past UAT-UK questions (4.72% of all historical Physics papers). Students using standard A-Level classroom methods spend an average of 140s on this archetype—blowing past the 90s ESAT budget. Using the 2-line Sub-90 heuristic below compresses solve time to 40s (saving 100s per question).

Historical Frequency

11 Past Qs

4.72% of Physics

Classroom Trap Time

140s

+50s over 90s budget

Sub-90 Target Time

40s

Banks +100s on the clock

Dominant UI Format

5-Option A–E

Maths 1 Skill: M1.2

Card 1 & Card 2 Preview: The Classroom Time Trap vs. Sub-90 2-Line Rule

Excerpted from our interactive 6-Step Topic Lesson for ARCH-P-02.

Launch All 6 Active-Recall Cards

CARD 1 OF 6 • THE CLASSROOM TIME TRAP (140s)

Why Students Bleed Time:

First compute total energy input

E_{\text{in}} = P t = 200 \times (5 \times 60) = 60000\text{ J}

. Next compute useful output

E_{\text{useful}} = 15\% \times 60000 = 9000\text{ J}

. Subtracting gives

E_{\text{wasted}} = 60000 - 9000 = 51000\text{ J}

(~120s).

In 11 past UAT-UK questions (4.72% of Physics), candidates lose 100s by substituting supply terminal voltage v_supply instead of cable voltage drop δv into v²/r. Instead, apply P1 with Maths 1 skill M1.2.

CARD 2 OF 6 • THE 2-LINE SUB-90 HEURISTIC (<40s)

Line 1 (Wasted Power):

P_{\text{waste}} = (1 - 0.15) \times 200 = 170\text{ W}

**Line 2 (Multiply by

60t

):**

E_{\text{waste}} = 170 \times (5\times 60) = 51000\text{ J}

(25s).

Sanity & Limit Check: Verify units/signs against subsystem_isolation_trap (Using P_loss = V_supply² / R_cable instead of I² * R_cable for transmission cable heating) and unit_or_prefix_mismatch (Forgetting to multiply power (W) by 60 when asked for energy transferred per minute).

Examiner Distractor Blueprint for ARCH-P-02

FOIL #1subsystem_isolation_trap

Using P_loss = V_supply² / R_cable instead of I² * R_cable for transmission cable heating

Substituting supply terminal voltage V_supply instead of cable voltage drop ΔV into V²/R.

Open Subsystem Isolation Trap Clinic

FOIL #2unit_or_prefix_mismatch

Forgetting to multiply power (W) by 60 when asked for energy transferred per minute

Leaving time in minutes instead of converting to seconds (J = W * s).

Open Unit / Prefix Mismatch Clinic

FOIL #3factor_of_two_or_stoichiometry_trap

Scaling P = I²*R linearly with I (2x) instead of quadratically (4x) when current doubles

Omitting the square on current I in P = I²*R.

Open Factor-of-2 / Stoichiometry Clinic

FOIL #4intermediate_stop_trap

Outputting useful energy received instead of wasted energy P_in*t - P_out*t

Stopping at output energy without subtracting from input energy.

Open Intermediate Stop Trap Clinic

Try 1 Live Sample Question Under the 90-Second Stopwatch

Press W to open the 2-line dry-wipe scratchpad, select A–E, and lock in to reveal the Dual-View solution.

Full 6-Card Lesson Launch All 15 Questions (ARCH-P-02)

ARCH-P-02: Electrical Power Dissipation (P = IV = I^2R = V^2/R), Grid Efficiency & Energy (E = VIt) (Sample)Physics

00:00.0

SUB-90 ZONE (<40S)

0.0s40s Sub-9090s ESAT Budget150s Classroom

Question 1 of 1ARCH-P-02 (6-Card Lesson)Format: Standard 5-Option

Right-click any option to cross out • Keys A–E + Enter

Question 1 of 1 • 90s Target

Ready to Start Question 1?

The question stem, diagram, and answer options are hidden behind this pre-start gate. When you click below, the question will reveal and your 90-second split stopwatch will immediately begin ticking.

Physics•ARCH-P-02•Standard 5-Option

or press Enter to start