You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Physics

Resistance and Resistors

The internal ...

Question

The internal resistance of a $2.1 V$ cell, which gives a current of $0.2 A$ through a resistance of $10 Ω$ , is -

1.0 Ω

No worries! We‘ve got your back. Try BYJU‘S free classes today!

0.2 Ω

No worries! We‘ve got your back. Try BYJU‘S free classes today!

0.5 Ω

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

0.8 Ω

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $0.5 Ω$

$I = \frac{E}{r + R}$

$0.2 = \frac{2.1}{r + 10}$

$0.2 \times (r + 10) = 2.1$

$r = 0.5 Ω$

 Hence, $(C)$ is the correct answer.

Suggest Corrections

Similar questions

Q. A cell of e.m.f. 2.1 V gives a current of 0.2 A. This current is passing through the resistance of 10

Ω

. The internal resistance of cell is :

Q. The internal resistance of a

2.1 V

cell which gives a current of

0.2 A

through a resistance of 10

Ω

Q. The internal resistance of a

2.1 V

cell which gives a current of

0.2 A

through a resistance of

10 Ω

is _______.

Q. Internal resistance of a

2.1 V

cell which gives a current of 0.2 A through an external resistance of

10 Ω

A cell of emf 2.1 V and internal resistance 0.2 ohm is connected to a 4 ohm external resistance. The potential difference across the terminal of the cell is

Join BYJU'S Learning Program

The internal resistance of a 2.1 V cell, which gives a current of 0.2 A through a resistance of 10 Ω, is -

The correct option is C 0.5 Ω I=Er+R 0.2=2.1r+10 0.2×(r+10)=2.1 r=0.5 Ω  Hence, (C) is the correct answer.

The internal resistance of a $2.1 V$ cell, which gives a current of $0.2 A$ through a resistance of $10 Ω$ , is -

The correct option is C $0.5 Ω$

$I = \frac{E}{r + R}$

$0.2 = \frac{2.1}{r + 10}$

$0.2 \times (r + 10) = 2.1$

$r = 0.5 Ω$

 Hence, $(C)$ is the correct answer.