Download App

3. current electricity — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics3. current electricity1 Mark
MCQ
The potential drop across the $3$ $\Omega$ resistor is ............... $V$
  • ✓
    $1$
  • B
    $1.5 $
  • C
    $2$
  • D
    $3$
✓

Answer

Correct option: A.
$1$
a
 Equivalent resistance $R = 4 + \frac{{3 \times 6}}{{3 + 6}} = 6\,\Omega $ and main current $i = \frac{E}{R} = \frac{3}{6} = 0.5\,A$

Now potential difference across the combination of $3$ $\Omega$ and $6$ $\Omega$, $V = 0.5 \times \left( {\frac{{3 \times 6}}{{3 + 6}}} \right) = 1\,Volt$

The same potential difference, also develops across $3$ $\Omega$ resistance.

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

Explore more

More "M.C.Q (1 Marks)" from 3. current electricity→3. current electricity — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

What is the respective number of α and β particles emitted in the following radioactive decay $90^{\mathrm{X}^{200}} \rightarrow 80^{\mathrm{Y}^{168}}$
→
The value of internal resistance of an ideal cell is $\Omega$
→
In young's double slit experiment performed using a monochromatic light of wavelength $\lambda$, when a glass plate $(\mu=1.5)$ of thickness $x \lambda$ is introduced in the path of the one of the interfering beams, the intensity at the position where the central maximum occurred previously remains unchanged. The value of $x$ will be..........
→
When white light is incident normally on an oil film of thickness $10^{-4} \,cm$ and refractive index $1.4$ then the wavelength which will not be seen in the reflected system of light is ........... $\mathring A$
→
Positive electric flux indicates that electric lines of force are directed:
→
The image formed by a concave mirror:
→
The potential at a distance $R/2$ from the centre of a conducting sphere of radius $ R$ will be
→
In pure inductive circuit, the curves between frequency $f$ and reciprocal of inductive reactance $1/XL$ is
→
The idea of parmanu was given by:
→
When the current change from $+ 2\,A$ to $-2\,A$ in $0.05$ $second$, an $e.m.f$. of $8 \,V$ is induced in a coil. The coefficient of self-induction of the coil is.....$H$
→