MCQ
Two identical cells send the same current in $2 \Omega$ resistance, whether connected in series or in parallel. The internal resistance of the cell should be
  • A
    $1 \Omega$
  • $2 \Omega$
  • C
    $\frac{1}{2} \Omega$
  • D
    $2.5 \Omega$

Answer

Correct option: B.
$2 \Omega$
$2 \Omega$

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

A medium is said to be dispersive, if(a) Light of different wavelengths propagate at different speeds(b) Light of different wavelengths propagate at same speed but has different frequencies(c) Light is gradually bent rather than sharply refracted at an interface between the medium and air(d) Light is never totally internally reflected
 
 
 
 
A solenoid of $1.5$ metre length and $4.0 \ cm$ diameter posses $10$ turn per $cm$ . A current of $5$ ampere is flowing through it. The magnetic induction at axis inside the solenoid is
If a star can convert all the He nuclei completely into oxygen nuclei. The energy released per oxygen nuclei is [Mass of He nucleus is 4.0026 amu and mass of Oxygen nucleus is 15.9994 amu]:
A bar magnet has a magnetic moment equal to $5 \times 10^{-5}\ \ce{weber \times m}$. It is suspended in a magnetic field which has a magnetic induction $(B)$ equal to $8 \pi \times 10^{-4}$ tesla. The magnet vibrates with a period of vibration equal to $15\sec.$ The moment of inertia of the magnet is
At a distance of 10 cm from a long straight wire carrying current, the magnetic field is 0.04 T. At the distance of 40 cm, the magnetic field will be(a) 0.01 T(b) 0.02 T(c) 0.08 T(d) 0.16 T
       
The photoelectric threshold wavelength for a metal surface is 6600 Å. The work function for this is(a) 1.87 V(b) 1.87 eV(c) 18.7 eV(d) 0.18 eV
       
Which of the following is the correct statement regarding electrochemical cell?
Lenz's law is a consequence of the law of conservation of:
Einstein's mass-energy relation is :
Half life of a radio-active substance is 20 minutes. The time between 20% and 80% decay will be(a) 20 minutes(b) 40 minutes(c) 30 minutes(d) 25 minutes