Bihar Board Physics Model Paper

Hi buddy here I am looking for Bihar School Examination Board Physics subject Model Paper, so would you plz tell me about the same here ??

[Garima Chauhan]

As you want here I am providing Bihar School Examination Board Physics subject Model Paper, on your demand :

Section -1 is Objective type and Section -2 is non-objective.

1_05

Sample Paper for Class 12

1. Carrying Total marks-28.
2. With total number of Questions: 25

Carrying total marks -42. It’s divided into

1. Short answer type having 11 questions. Each carrying 2 marks each
2. Long answer type having 5 Questions. Each carrying 5 marks each

SECTION -1(OBJECTIVE TYPE)

In the following questions Q no 1 to 10 there are only one correct answer. You have to choose that correct answer

1. S.I unit of flun is

Ohm
Weber
Telsa
None

Answer- 1

2. The relation between geometric length (Ls) an magnetic length (Lm) is—

1. Lm=5/6 Ls
2. Lm=6/5 Ls
3. Lm = Ls
4. Lm = 2Ls

Answer- 1

3. Refractive index of glass and water are 3/2 and 4/2 respectively for say of light going to water for glan, the critical only will be

Sin-1 (8/9)
Sin-1(9/8)
Sin-1(3/4)
Sin-1(2/3)

Answer- 1

4. The modulation index in amplitude modulation is-

Always zero
Between 0 & 1
Between 1 & infinity
None of these

Answer- 3

5. Air bulbla inside water shines due to

Reflaction
Reflution
Total inverse reflection
None of these

Answer- 3

6. When a dielectric is introduced in between a parallel plate capacitor the capacitance of the capacitor :

Decreases
Increase
Remains the same
None of these

Answer- 2

7. In a double sit experiment the distance between the sits is 1mm and the distance of the screen from the sit is 1m. If light of wavelength 6000 Armstrong is used, then the fringe width is:

0.4 mm
0.5 mm
0.6 mm
0.8 mm

Answer- 3

8. The radius of curvature of the path of a charged particle in a uniform magnetic field is directly proportional to the:

Ground waves
Sky waves
Surface waves
Space waves

Answer- 2

9. Frequencies in the UHF range normally propagate by means of-

ground waves
sky waves
surface waves
space waves

Answer- 4

10. The given symbol represents which gate?

Logic-gate-nand-us

AND
OR
NAND
NOR

Answer- 3

Instructions from question 11 to 15. Two statements (statement I and statement II ) are given. Out of the four options a, b, c, d choose the correct option on the basis of the questions.

Marks awarded- 5 *1 =5

If both the statements are true and statement II is the correct explanation of statement I.
If both the statements are true and statement II is not the correct explanation of statement I
If statement I is true and statement II is false
If statement I is false and statement II is true.

1. Statement I: a P.N junction diode acts as a natural transistor.

Statement II: P.N junction diode operates in the forward bias and not in the reverse bias.

Answer- 4

2. Statement I: according to Faraday electromagnetic induction, the negative rate of change of magnetic flux is equal to the induced emf.

Statement II: lenz’s law explains the negative sign in the basis of conservation of energy.

Answer- 3

3. Statement I: energy is released when heavy nuclei undergoes fission or light nuclei undergoes fusion.

Statement II: for heavy nuclei, biding energy per nucleon increases with Z while for light nuclei it decreases with increasing Z

Answer- 3

4. Statement I: when a beam of white light passes through a glass, the light splits into constituents colours.

Statement II: the dispersion of light takes place because the refractive index of a medium depends on the wavelength of light

Answer- a

5. Statement I: if X is susceptibility and T is absolute temperature, the X-T graph of a diatomic substance is a straight line parallel to T axis.

Statement II: diamagnetic materials follow curie law.

Answer- 3

Directions for questions 16 to 18:

Select the correct answer to each questions:

16. Radius of hydrogen atom

Equal to Z
Equal to square of n
Equal to Z inverse
Equal to n

Answer- 2

17. Choke coil is an inductor of

High reactance
Low reactance
High resistance
Low resistance.

Answer-a, c

18. The distance of object from concave mirror of focal length 15 cm, so that the image is three times magnified is:

7.5 cm
10 cm
17.5 cm
20 cm

Answer- b, d

Directions for questions 19 to 20: 19 to 22 are two columns matching type. Match it correctly.
19.Virtual image of real object20. Total internal reflection

21. Scatting

22. Diffraction
(a) Wave, wavelength of the sixe of the object(b) Blue colour of sky

(c) Optical fibre

(d) Convex mirror.

Answers-

19. (d)
20. (c)
21. (b)
22. (a)