MCQ
If a unit positive charge is taken from one point to another over an equipotential surface, then
  • A
    Work is done on the charge
  • B
    Work is done by the charge
  • C
    Work done is constant
  • No work is done

Answer

Correct option: D.
No work is done
d
On the equipotential surface, electric field is normal to the charged surface (where potential exists) so that no work will be done.

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 coefficient of restitution $e$ for a perfectly elastic collision is
A particle starts moving with acceleration $2 \,m / s ^2$. Distance travelled by it in $5^{\text {th }}$ half second is ....... $m$
Venus looks brighter than other stars because
Power dissipated in an $LCR$ series circuit connected to an $A.C.$ source of $e.m.f$  $\varepsilon$ is
The $rms$ speeds of the molecules of Hydrogen, Oxygen and Carbondioxide at the same temperature are ${V}_{{H}}, {V}_{0}$ and ${V}_{{C}}$ respectively then
For a constant collector-emitter voltage of $8\,V$, the collector current of a transistor reached to the value of $6\,mA$ from $4\,mA$, whereas base current changed from $20\,\mu A$ to $25\,\mu\,A$ value. If transistor is in active state, small signal current gain (current amplification factor) will be.
The cathode of a photocell is changed such that the work function changes from $w_1$ to $w_2\left(w_2 > w_1\right)$. If the saturation currents before and after the change are $l_1$ and $l_2$ and all other conditions are unchanged, then (assuming $h v > w_2$ )
In Millikan's oil drop experiment, what is viscous force acting on an uncharged drop of radius $2.0 \times 10^{-5}\, {m}$ and density $1.2 \times 10^{3} \,{kgm}^{-3}$ ? Take viscosity of liquid $=1.8 \times 10^{-5}\, {Nsm}^{-2} .$ (Neglect buoyancy due to air).
If in nature there may not be an element for which the principal quantum number $n > 4,$ then the total possible number of elements will be
A body of mass m having an initial velocity $v$, makes head on collision with a stationary body of mass $M$. After the collision, the body of mass $m$ comes to rest and only the body having mass $M$ moves. This will happen only when