Grouping of Cells Past Year (2006 - 2015) MCQs Current Electricity Physics NEET Practice Questions, MCQs, Past Year Questions (PYQs), NCERT Questions, Question Bank, Class 11 and Class 12 Questions, and PDF solved with answers

1(current)

Ten identical cells connected in series are needed to heat a wire of length one meter and radius $r$ by $10^\circ \text{C}$ in time $t.$ How many cells will be required to heat the wire of length two meters of the same radius by the same temperature in time $t?$

1.	$20$	2.	$30$
3.	$40$	4.	$10$

Subtopic: Grouping of Cells |

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From NCERT

NEET - 2013

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Q2:

Two cells having the same emf, are connected in series through an external resistance R. Cells have internal resistance r₁ and r₂ respectively. When the circuit is closed, the potential difference across the first cell is zero. The value of R is:

1. $r_{1} - r_{2}$

2. $\frac{r_{1} + r_{2}}{2}$

3. $\frac{r_{1} - r_{2}}{2}$

4. $r_{1} + r_{2}$

Subtopic: Grouping of Cells |

From NCERT

AIPMT - 2006

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NEET 2023 - Target Batch - Aryan Raj Singh

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1.	\(20\)	2.	\(30\)
3.	\(40\)	4.	\(10\)

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