Shortcut Methods
Wheatstone’s bridge:
- Shortcut:
Where P and Q are the lengths of the two arms of the bridge on either side of the galvanometer.
- Tricks:
To remember the formula, use the mnemonic: “Right over left equals Wheatstone’s cleft” Where “Right” refers to Rx, “left” refers to R1, and “cleft” refers to the fraction P/Q.
Meter bridge:
- Shortcut:
- Tricks:
To remember the formula, use the mnemonic: “Resistance equals Resistor times Length”
Potentiometer:
-
Shortcut:
-
Tricks:
To remember the formula, use the mnemonic: “Voltage_x_equals_E_times(length_2_divided_by_L)”
