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 required to heat a wire of length $1$ metre and radius $r$ by $10^\circ ~\text{C}$ in time $t.$ How many cells will be needed to heat a wire of length $2$ metres with the same radius by the same temperature in the same time $t?$
1. $20$
2. $30$
3. $40$
4. $10$

Subtopic: Grouping of Cells |

58%

From NCERT

NEET - 2013

Please attempt this question first.

Hints

Please attempt this question first.

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

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

Hints

Links

To view explanation, please take trial in the course.

NEET 2025 - Target Batch

1(current)

Q. No.

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions

Add Note

Highlight in NCERT