Alternating Current:
| Sr. No | What To Remember | Mnemonic |
| 1 | For an inductive (L) circuit, the EMF (E) is ahead of (leads) the current (I) | ELI |
| 2 | For a capacitive circuit (C), the current (I) is ahead (leads) of the EMF (E). | ICE |
Electromagnetic Spectrum
| Sr. No | What To Remember | Mnemonic |
| 1 | Radio waves Microwaves Infrared Visible Ultra-violet X-ray Gamma Rays | Roman Men Invented Very Unusual Xray Guns |
Resistor Color Code
The sequence of colors can be remembered by the sentence:
B B Roy of Great Britain has Very Good Wife who loves Gold and Silver.
Trigonometric Signs in the Four Quadrants
Remember the phrase:
All Silver Tea Cups
Quadrant 1 – All trigonometric ratios are positive.
Quadrant 2 – Sine and its reciprocal cosec are positive.
Quadrant 3 – Tangent and its reciprocal cot are positive.
Quadrant 4 – Cosine and its reciprocal sec are positive.
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