In the circuit as shown in figure the - Vidyadip

MCQ

In the circuit as shown in figure the

A
Resistance $R = 46 \,\Omega$
B
Current through $20\,\Omega$ resistance is $0.1 \,A$
C
Potential difference across the middle resistance is $2\, V$
✓
All option are correct

✓

Answer

Correct option: D.

All option are correct

d
$\frac{1}{{R'}} = \frac{1}{{10}} + \frac{1}{{10}} + \frac{1}{{20}}$$ \Rightarrow R' = \frac{{20}}{5} = 4\;\Omega $

Now using ohm’s law $i = \frac{{25}}{{R + R'}}$$ \Rightarrow 0.5 = \frac{{25}}{{R + 4}}$

$ \Rightarrow R + 4 = \frac{{25}}{{0.5}} = 50$ $ \Rightarrow R = 50 - 4 = 46\;\Omega $

Current through $20\,\Omega $ resistor $ = \frac{{0.5 \times 5}}{{20 + 5}} = \frac{{2.5}}{{25}} = 0.1\,A$

Potential difference across middle resistor
$=$ Potential difference across $20\,\Omega $$ = 20 \times 0.1 = 2\,V$

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

The fact that photons carry energy was established by

A charge $Q$ is moving $\overrightarrow{dl}$ distance in the magnetic field $\overrightarrow{ B }$. Find the value of work done by $\overrightarrow{ B }$.

Two positive ions, each carrying a charge $q,$ are separated by a distance $d.$ If $F$ is the force of repulsion between the ions, the number of electrons missing from each ion will be ($e$ being the charge on an electron)

Planck constant has the same dimensions as:

For a chosen non$-$zero value of voltage, there can be more than one value of current in:

The wavefront of a distant source of unknown shape is approximately:

A transistor is used as an amplifier in CB mode with a load resistance of 5 k W the current gain of amplifier is 0.98 and the input resistance is 70 W, the voltage gain and power gain respectively are

In the circuit shown in the figure, the total charge in $750\, \mu C$ and the voltage across capacitor $C _{2}$ is $20\, V$. Then the charge on capacitor $C _{2}$ is$....\mu C$

A conducting rod $A B$ of length $l$ is projected on a frictionless frame $P S R Q$ with velocity $v_0$ at any instant. The velocity of the rod after time $t$ is

In photoelectric effect, stopping potential depends on