Download App

Ray Optics and Optical Instruments — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsRay Optics and Optical Instruments1 Mark
MCQ

The image formed by a concave mirror:

  • A
    Is always real.
  • B
    Is always virtual.
  • C
    Is certainly real if the object is virtual.
  • D
    Is certainly virtual if the object is real.
✓

Answer

  1. Is certainly real if the object is virtual.

Explanation:

Object
Image
O1
I1
O2
I2
O3
I3
O4
I4

Here O4 is virtual oblect & I4 is real image.

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

Explore more

More "M.C.Q [1M]" from Ray Optics and Optical Instruments→Ray Optics and Optical Instruments — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

Two waves are said to be coherent :
→

In Bohr's model of hydrogen atom, let PE represents potential energy and TE the total energy. In going to a higher level

(a) PE decreases, TE increases

(b) PE increases, TE increases

(c) PE decreases, TE decreases

(d) PE increases, TE decreases
→

 electrons reach the anode per second. If the power consumed is 448 milliwatts, then the plate (anode) voltage is

(a) 150 V

(b) 200V

(c) 14 × 448 V

(d) 448/14V
→

A galvanometer can be used as a voltmeter by connecting a

(a) High resistance in series

(b) Low resistance in series

(c) High resistance in parallel

(d) Low resistance in parallel
→
The radiant energy of the sun results from:
→

An achromatic prism is made by combining two prisms   and ; where μ  represents the refractive index. If the angle of the prism   is 10°,  then the angle of the prism P2 will be

(a) 5°

(b) 7.8°

(c) 10.6°  

(d) 20°
→

The acceleration of an electron in an electric field of magnitude 50 V/cm, if e/m value of the electron is  1.76  is

(a) 8.8  m/sec2

(b) 6.2  m/sec2

(c) 5.4  m/sec2

(d) Zero
→

Which of one is correct

(a)  

(b)  

(c)  

(d)  
→

In a nuclear reaction, which of the following is conserved

(a) Atomic number

(b) Mass number

(c) Atomic number, mass number and energy

(d) None of these
→

A toroid has number of turns per unit length n, current i, then the magnetic field is

(a)   

(b)  

(c)

(d) None of these
→