MCQ
Which of the following mirrors always forms a virtual and small image?
  • A
    Plane mirror
  • B
    Concave mirror
  • C
    Plane and concave mirror
  • Convex mirror

Answer

Correct option: D.
Convex mirror
(D) - Convex mirror

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 short magnets of equal dipole moments M are fastened perpendicularly at their centre (figure). The magnitude of the magnetic field at a distance d from the centre on the bisector of the right angle is:

  1. $\frac{\mu_0}{4\pi}\frac{\text{m}}{\text{d}^3}$

  2. $\frac{\mu_0}{4\pi}\frac{\sqrt{2}\text{M}}{\text{d}^3}$

  3. $\frac{\mu_0}{4\pi}\frac{\sqrt[2]{2}\text{M}}{\text{d}^3}$

  4. $\frac{\mu_0}{4\pi}\frac{2\text{M}}{\text{d}^3}$

Flux density under trailing pole tips in case of generator will:

When a magnet is pushed in and out of a circular coil C connected to a very sensitive galvanometer G as shown in the adjoining diagram with a frequency v, then

(a) Constant deflection is observed in the galvanometer

(b) Visible small oscillations will be observed in the galvanometer if v is about 50 Hz

(c) Oscillations in the deflection will be observed clearly if v = 1 or 2 Hz

(d) No variation in the deflection will be seen if v = 1 or 2 Hz

In Young's interference experiment, if the slits are of unequal width, then:

Assertion  :  In a movie, ordinarily 24 frames are projected per second from one end to the other of the complete film.

Reason      : The image formed on retina of eye is sustained upto 1/10 second after the removal of stimulus.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

Demagnetisation of magnets can be done by:
According to Bohr’s theory of H atom, an electron can revolve around a proton indefinitely, if its path is:

A current carrying long solenoid is placed on the ground with its axis vertical. A proton is falling along the axis of the solenoid with a velocity v. When the proton enters into the solenoid, it will

(a) Be deflected from its path

(b) Be accelerated along the same path

(c) Be decelerated along the same path

(d) Move along the same path with no change in velocity

A luminous object is placed at a distance of 30 cm from the convex lens of focal length 20 cm. On the other side of the lens, at what distance from the lens a convex mirror of radius of curvature 10 cm be placed in order to have an upright image of the object coincident with it

(a) 12 cm

(b) 30 cm

(c) 50 cm

(d) 60 cm

Electrical energy $U _0$ is stored in a charged parallel plate capacitor. On increasing the distance between the plates of a capacitor, double to initial distance the electrical energy will be :