MCQ
Sensitivity of potentiometer can be increased by:
- AIncreasing the $\text{e.m.f.}$ of the cell.
- ✓Increasing the length of the potentiometer.
- CDecreasing the length of the potentiometer wire.
- DNone of these.
✓
Answer
Correct option: B.
Increasing the length of the potentiometer.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The eye can detect $5 \times 10^4$ photons per square metre per sec of green light (l = 5000 Å) while the ear can detect $10^{-13}\left(\mathrm{~W} / \mathrm{m}^2\right)$. The factor by which the eye is more sensitive as a power detector than the ear is close to
→Missing lines in a continuous spectrum reveal
An electron is constrained to move along the $y-$axis with a speed of $0.1\, c$ (c is the speed of light) in the presence of electromagnetic wave, whose electric field is $\overrightarrow{ E }=30 \hat{ j } \sin \left(1.5 \times 10^{7} t -5 \times 10^{-2} x \right)\, V / m$ The maximum magnetic force experienced by the electron will be: (given $c=3 \times 10^{8}\, ms ^{-1}$ and electron charge $\left.=1.6 \times 10^{-19} C \right)$
→A concave mirror is placed at the bottom of an empty tank with face upwards and axis vertical. When sunlight falls normally on the mirror, it is focussed at distance of $32 \,cm$ from the mirror. If the tank filled with water $\left( {\mu = \frac{4}{3}} \right)$ upto a height of $20 \,cm$, then the sunlight will now get focussed at
→Electric field at a place is $\overrightarrow {E\,} = {E_0}\hat i\,V/m$ . A particle of charge $+q_0$ moves from point $A$ to $B$ along a circular path find work done in this motion by electric field
→The equivalent resistance between points $A$ and $B$ of an infinite network of resistances each of $1\,\Omega $ connected as shown, is
→A $10\ \mu F$ capacitor is charged to a potential difference of $1000\ V$. The terminals of the charged capacitor are disconnected from the power supply and connected to the terminals of an uncharged $6\ \mu F$ capacitor. What is the final potential difference across each capacitor.....$V$
→A coil of self$-$inductance $L$ is connected in series with a bulb $B$ and an $AC$ source. Brightness of the bulb decreases when.
→A magnet is moved in the direction indicated by an arrow between two coils $A B$ and $C D$ as shown in figure. The direction of induced current in the straight wire is
→If radii of curvature of both convex surfaces is $20 \,cm$, then focal length of the lens for an object placed in air in the given arrangement is .......... $CM$
→