MCQ
Two similar cells, whether joined in series or in parallel, same current flows in external resistance of 2. The internal resistance of each cell is:
  • A
    1 ohm
  • 2 ohm
  • C
    0.15 ohm
  • D
    10 ohm

Answer

Correct option: B.
2 ohm
(b)2 ohm

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The mean square speed of the molecules of a gas at absolute temperature T is proportional to:
  1. $\frac{1}{\text{T}}$
  2. $\sqrt{\text{T}}$
  3. $\text{T}$
  4. $\text{T}^2$
A person travelling on a straight line moves with a uniform velocity v1 for a distance x and with a uniform velocity v2 for the next equal distance. The average velocity v is given by:

  1. $\text{v}=\frac{\text{v}_1+\text{v}_2}{2}$

  2. $\text{v}=\sqrt{\text{v}_1\text{v}_2}$

  3. $\frac{2}{\text{v}}=\frac{1}{\text{v}_1}+\frac{1}{\text{v}_2}$

  4. $\frac{1}{\text{v}}=\frac{1}{\text{v}_1}+\frac{1}{\text{v}_2}$

Find the equivalent resistance across AB

(a) 1 W

(b) 2 W

(c) 3 W

(d) 4 W

A helium nucleus makes a full rotation in a circle of radius 0.8 metre in two seconds. The value of the magnetic field B at the centre of the circle will be

(a)   

(b)  

(c) 2  

(d)

A compass needle, which shows the direction at the earth's magnetic pole is:
When does a magnetic dipole possess maximum potential energy inside a magnetic field?

Which of the following statement is true

(a)   has 78 neutrons

(b)  

(c)  

(d)  

The wrong statement about electric lines of force is

(a) These originate from positive charge and end on negative charge

(b) They do not intersect each other at a point

(c) They have the same form for a point charge and a sphere

(d) They have physical existence

A straight conductor carries a current. Assume that all free electrons in the conductor move with the same drift velocity v. A and B are two observers on a straight line XY parallel to the conductor. A is stationary. B moves along XY with a velocity v in the direction of the free electrons.

Two short magnets of equal dipole moments M are fastened perpendicularly at their centre (figure). The magnitude of the magnetic field at a distance d from the centre on the bisector of the right angle is

(a)   

(b)

(c)

(d)