Question

In a step up transformer the turn ratio is 1:2. A Leclanche cell (emf = 1.5 V) is connected across the primary. The voltage across the secondary is

• A. 3.0 V
• B. 1.5 V
• C. 0.75 V
• D. 0

Answer 1

The correct option is A 3.0 V

For the step up transformer -

$\frac{V_1}{V_2}=\frac{n_1}{n_2}$

$\frac{1.5}{V_2}=\frac{1}{2}$

$\Rightarrow V_2=3V$.