MCQ
A point charge $Q$ is placed in uniform electric field $\vec E = E_1 \hat i + E_2\hat j$ at position $(a, b)$. Find work done in moving it to position $(c, d)$
  • A
    Zero
  • $\{E_1(c -a) + E_2(d-b)\}Q$
  • C
    $\{E_1\, ac + E_2\, bd\}Q$
  • D
    $\{E_1c + E_2d\}Q$

Answer

Correct option: B.
$\{E_1(c -a) + E_2(d-b)\}Q$
b

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

Two particles are moving along two long straight lines, in the same plane, with the same speed $= 20 \,\,cm/s$. The angle between the two lines is $60^o$, and their intersection point is $O$. At a certain moment, the two particles are located at distances $3\,m$ and $4\,m$ from $O$, and are moving towards $O$. Subsequently, the shortest distance between them will be
An arrow is shot into air. Its range is $200\,m$ and its time of flight is $5\,s$. If $g=10\,m / s ^2$, then horizontal component of velocity and the maximum height will be respectively
In the system shown in the adjoining figure, the tension $T_2$ is
In the circuit shown, the current in the $1\,\Omega$ resistor is
A $70\, kg$ man leaps vertically into the air from a crouching position. To take the leap the man pushes the ground with a constant force $F$ to raise himself The center of gravity rises by $0.5\, m$ before he leaps. After the leap the $c.g.$ rises by another $1\, m$. The maximum power delivered by the muscles is : (Take $g\, = 10\, ms^{-2}$)
Two identical fuses are rated at $10\,A$. If they are joined
The resistance of a wire is $R\; ohm$. If it is melted and stretched to $'n'$ times its original length, its new resistance will be
The respective number of significant figures for the numbers $23.023, 0.0003 $ and $2.1 \times 10^3$ are 
The dimensions of pressure is equal to
A cricket ball is thrown by a player at a speed of $20\,m / s$ in a direction $30^{\circ}$ above the horizontal. The maximum height attained by the ball during its motion is $........\,m$ $\left( g =10\,m / s ^2\right)$