Download App

Wave Optics β€” Physics STD 12 Science β€” Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsWave Optics1 Mark
Question

Wavefront of a wave has direction with wave motion

(a) Parallel

(b) Perpendicular

(c) Opposite

(d) At an angle of πœƒ
βœ“

Answer

(b) Perpendicular

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes β€” across 16+ boards, with answer keys.

Start Generating Free

Explore more

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

Similar questions

For production of characteristic  X-rays, the electron transition is

(a) n = 2 to n = 1

(b) n = 3 to n = 2

(c) n = 3 to n = 1

(d) n = 4 to  n = 2

β†’

Consider the following statements A and B and identify the correct choice of the given answers

A : The width of the depletion layer in a P-N junction diode increases in forwards bias

B : In an intrinsic semiconductor the fermi energy level is exactly in the middle of the forbidden gap

(a) A is true and B is false

(b) Both A and B are false

(c) A is false and B is true

(d) Both A and B are true
β†’

In a capacitor of capacitance 20 μF, the distance between the plates is 2mm. If a dielectric slab of width 1mm and dielectric constant 2 is inserted between the plates, then the new capacitance is

(a) 2 μF   

(b) 15.5 μF

(c) 26.6 μF

(d) 32 μF
β†’

A spherical conductor of radius 2m is charged to a potential of 120 V. It is now placed inside another hollow spherical conductor of radius 6m. Calculate the potential to which the bigger sphere would be raised

(a) 20 V

(b) 60 V

(c) 80 V

(d) 40 V
β†’
The waves which are electromagnetic in nature are:
β†’
Coils in the resistance boxes are made from doubled up insulated wires.
β†’

Which of the following shown particle nature of light

(a) Refraction

(b) Interference

(c) Polarization

(d) Photoelectric effect
β†’
What is the angle between the electric dipole moment $\vec{p}$ and the electric field strength $\vec{E}$ when the dipole is in a stable equilibrium ?
β†’
The decay constant of a radioactive sample is $\lambda.$ The half-life and the average-life of the sample are respectively:

  1. $\frac{1}{\lambda}$ and $\Big(\text{ln}\frac{2}{\lambda}\Big)$

  2. $\Big(\text{ln}\frac{2}{\lambda}\Big)$ and $\frac{1}{\lambda}$

  3. $\lambda(\text{ln}2)$ and $\frac{1}{\lambda}$

  4. $\frac{\lambda}{(\text{ln})2}$ and $\frac{1}{\lambda}$

β†’
Refer to figure. Let $\Delta\text{U}_1$ and $\Delta\text{U}_2$ be the changes in internal energy of the system in the processes A and B. Then,
  1. $\Delta\text{U}_1>\Delta\text{U}_2$
  2. $\Delta\text{U}_1=\Delta\text{U}_2$
  3. $\Delta\text{U}_1<\Delta\text{U}_2$
  4. $\Delta\text{U}_1\neq\Delta\text{U}_2$
β†’