Correct Answer

Direct FormulaElectricalBasic Electrical

Option A

Quick Summary: Given: Number of cells = 5, Voltage per cell (E) = 2 V, Connection type = Parallel.

📋 Given

Number of cells = 5, Voltage per cell (E) = 2 V, Connection type = Parallel.

🔢 Formula Used

Vtotal=E1=E2=⋯=EnV_{total} = E_1 = E_2 = \dots = E_nVtotal​=E1​=E2​=⋯=En​

📊 Diagram / Illustration

🔢 Step-by-Step Solution

Identify connection type

The cells are connected in parallel. In a parallel circuit, the potential difference across each branch remains the same.

Vparallel=V1=V2=VnV_{parallel} = V_1 = V_2 = V_nVparallel​=V1​=V2​=Vn​

Apply the principle for parallel cells

When identical cells with voltage $E$ are connected in parallel, the total terminal voltage of the combination is equal to the voltage of a single cell.

Voutput=2 VV_{output} = 2 \text{ V}Voutput​=2 V

✅

D is correct because when identical cells are connected in parallel, the total output voltage is equal to the voltage of a single individual cell, which is 2 V.

Core Concepts Used

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Parallel Circuit Internal Resistance Cell EMF

💡 EXAM TIP

Always remember: in series connections, voltages add up ( $V_{total} = nE$ ), but in parallel connections, voltage remains constant ( $V_{total} = E$ ) while current capacity increases.

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