MCQ

When we see an object, the image formed on the retina is:

  • A
    Real.
  • B
    Virtual.
  • C
    Erect.
  • D
    Inverted.

Answer

  1. Ral.
  2. Ierted.

Explanation:

The retina acts as a screen in the eye; only real, inverted images can be obtained on the screen.

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 wavelength of a photon needed to remove a proton from a nucleus which is bound to the nucleus with 1MeV energy is nearly:

Two magnets A and B are identical and these are arranged as shown in the figure. Their length is negligible in comparison to the separation between them. A magnetic needle is placed between the magnets at point P which gets deflected through an angle θ  under the influence of magnets. The ratio of distance   and  will be

(a)

(b)

(c)

(d)

The graph of ln$\Big(\frac{\text{R}}{\text{R}_{\text{0}}}\Big)$ versus In A (R = radius of a nucleus and A - its mass number) is:
  1. A straight line.
  2. A parabola.
  3. An ellipse.
  4. None of them.
Huygens' wave theory is used:

Consider an electron (m = 9.1   confined by electrical forces to move between two rigid walls separated by 1.0  metre, which is about five atomic diameters. The quantised energy value for the lowest stationary state is

(a) 12  

(b) 6.0  

(c) 6.0  

(d) 6 Joule

A circular coil having N turns is made from a wire of length L meter. If a current I ampere is passed through it and is placed in a magnetic field of B Tesla, the maximum torque on it is

(a) Directly proportional to N

(b) Inversely proportional to N

(c) Inversely proportional to  

(d) Independent of N

Through a semiconductor, an electric current is due to drift of

(a) Free electrons

(b) Free electrons and holes

(c) Positive and negative ions

(d) Protons

Two plates of parallel plate capacitor are joined inside with metal rod. The capacitance of a capacitor is __________ .
The wavelength $\lambda$, frequency $v$, velocity $v$ and intensity I of a light ray transmitted in air respectively. If this ray enters water, then the values of these quantities become $\lambda^{\prime}, \nu^{\prime}, v^{\prime}$ and $I^{\prime}$ respectively. Which of the following relations is correct?

An electron is accelerated through a potential difference of 200 volts. If e/m for the electron be 1.6   coulomb/kg, the velocity acquired by the electron will be

(a) 8  

(b) 8 

(c) 5.9  

(d) 5.9