Physics · Current Electricity
The potential difference V across the filament of the bulb shown in a Wheatstone bridge varies as V = i(2i + 1), where 'i' is the current in amperes through the filament of the bulb. If the bridge is balanced with resistors of 4 Ω and 8 Ω in the upper branches, and the bulb and a 12 Ω resistor in the lower branches, the emf of the battery (V a ) required to balance the bridge is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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25 V
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