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Chapter 4: Q5DQ (page 840)

When is a 1.5 - VAAA battery not actually a 1.5 - V battery? That is, when do this its terminals provide a potential difference of less than 1.5 V ?

Short Answer

Expert verified

The battery emf is less than 1.5 V when the power drop ofiR is there in the battery.

Step by step solution

01

Definition of Potential difference

The potential difference is defined as the work required to move the charge of unit magnitude from a point in the conductor to the other point.

02

Determine the when potential difference provide less than 1.5 - V .

Consider the expression for the voltage.

V=蔚-iR

Here, the voltage is the V, the emf of the battery is 蔚, the current is i and the resistance is R.

Here, the product of the current and the resistance are the voltage drop in the circuit and the V is the voltage available at the terminal. So the actual voltage supplied before the drops is 蔚.

Therefore, the battery emf is less than 1.5 V when the power drop of iRis there in the battery.

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