MCQ
The minimum distance between an object and its real image formed by a convex lens is
  • A
    $1.5 f$
  • B
    $2 f$
  • C
    $2.5 f$
  • $4 f$

Answer

Correct option: D.
$4 f$

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

Voltmeters $V$ and $V$ are connected in series across a D.C. line. $V$ reads 80 volts and has a per volt resistance of $200$ ohms. $V$ has a total resistance of $32$ kilo ohms. The line voltage is
The magnetic potential at a point on the axial line of a bar magnet of dipole moment $M$ is $V$. What is the magnetic potential due to a bar magnet of dipole moment $\frac{M}{4}$ at the same point
The wavelengths of two waves are $50$ and $51 \mathrm{~cm}$ respectively. If the temperature of the room is $20 ^{\circ} \mathrm{C}$, then what will be the number of beats produced per second by these waves, when the speed of sound at $0^{\circ} \mathrm{C}$ is $332\  \mathrm{~m} / \mathrm{sec}$
The ammeter has range $1\, ampere$ without shunt. the range can be varied by using different shunt resistances. The graph between shunt resistance and range will have the nature
A sphere of mass $m$, moving with velocity $V$, enters a hanging ban of sand and stops. If the mass of the bag is $M$ and it is raised by height $h$, then the velocity of the sphere was
An ice berg of density $900\ Kg / m$ is floating in water of density $1000\ Kg / m$. The percentage of volume of ice-cube outside the water is
The adjoining figure shows two bulbs $B$ and $B$ resistor $R$ and an inductor $L$. When the switch $\mathrm{S}$ is turned offImage
A particle starts S.H.M. from the mean position. Its amplitude is $A$ and time period is $T$. At the time when its speed is half of the maximum speed, its displacement $y$ is
Water does not wet an oily glass because
A body of mass $10 \mathrm{~kg}$ is dropped to the ground from a height of $10$ metres. The work done by the gravitational force is $\left(g=9.8 \mathrm{~m} / \mathrm{sec}^2\right)$