Bihar board12th Physics vvi objective question
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12th Physics Question
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12th Board Exam Chemistry Objective Model Set Paper इंटरमीडिएट परीक्षा रसायन विज्ञान मॉडल सेट पेपर
bihar board Physics objective question
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12th Physics Question
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Bihar board vvi question
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Class 12th Physics Model Set Objective Question On New Pattern इंटर परीक्षा भौतिक विज्ञान महत्वपूर्ण प्रशन
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Class 12th Exam Biology Most VVI Objective Model Set Paper Question
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Bihar Board 12th Physics Official Model Paper 2023 Short Long Type Question With Answer
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12th Exam Physics Model Set Objective Question On New Pattern इंटर परीक्षा भौतिक विज्ञान महत्वपूर्ण प्रशन12th Board Exam Chemistry Objective Model Set Paper इंटरमीडिएट परीक्षा रसायन विज्ञान मॉडल सेट पेपर
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- 12th English Most VVI All Chapter Summary English 100 Marks Important Question with Answer
- 12th Chemistry Objective Model Set Paper इंटर परीक्षा रसायन विज्ञान मॉडल सेट पेपर
Physics vvi objective question
किसी आवेशित चालक के सतह बिंदु पर विधुतीय-क्षेत्र का मान होता है :-
(a) ε₀ σ
(b) σ/ε₀
(c) Zero
(d) σ/2ε₀
Ans:- (b)
Board ke lie objective question
आवेशित खोखले गोलीय चालक के अन्दर विधुत-तीव्रता होती है :-
(a) ε₀ σ
(b) σ/ε₀
(c) Zero
(d) ε₀/2
Ans:- (c)
(3) एक आवेशित चालक के किसी विन्दु पर विधुतीय क्षेत्र की तीव्रता :-
(a) शुन्य
(b) सतह के लंबवत होती है
(c) सतह के स्पर्शीय होता है
(d) सतह 45 डिग्री से पर होती है
Ans:-(b)
Important objective
किसी आवेशित चालक के भीतर विधुतीय-क्षेत्र और विधुत विभव का मान क्रमशः होता है :-
(a) समरूप, शुन्य
(b) शुन्य, समरूप
(c) अनंत, असमरूप
(d) असमरूप, अनंत
Ans:-(b)
चालक पदार्थ से बने असीमित आवेशित पतली चादर की सतह के निकट स्थित किसी बिंदु पर विधुतीय-क्षेत्र का मान होता है :-
(a) ε₀ σ
(b) σ/ε₀
(c) σ/2ε₀
(d) (1/2)ε₀ σ
Ans:-(c)
vvi objective question in hindi
(6) 2C आवेश को एक बिंदु से दुसरे बिंदु तक ले जाने में 20 J कार्य की आवश्यकता होती है ! इन दोनों बिन्दुओं के बीच वोल्ट में विभवान्तर है !
(a) 10
(b) 20
(c) 5
(d) 2
Ans:-(a)
12th Board Physics VVI Important Objective MCQ Question || Physics Class Notes Objective NCERT
PHYSICS (भौतिक शास्त्र) Top 200 Objective MCQ Question, 12th Board PHYSICS Most VVI Objective Question With Answer PART – 1 In English Medium
1. Coulombian force is
(A) Central force
(B) electric force
(C) both (A) and (B)
(D) none of these
ANSWER :- C
2. uniform electric field exists along X-axis, then equipotential is along
(A) XY-plane
(B) XZ-plane
(C) YZ-plane
(D) anywhere
ANSWER :- C
3. To increase sensitivity of a potentiometer, its
(A) area should be increased .
(B) Current should be decidas
(C) current should be increased
(D) length should be increased.
ANSWER :- A
4. The phase difference between electric and magnetic fields in an electromagnetic wave is
(A) O
(B) π / 2
(C) π
(D) anything.
ANSWER :- B
5. Sky wave communication is based upon
(A) reflection by ionosphere
(B) absorption by ionosphere
(C) transmission through ionosphere
(D) none of these.
ANSWER :- A
6. Main gate (Basic gate) is
(A) AND, OR
(B) NAND, NOR
(C) OR, NOT
(D) AND, OR, NOT.
ANSWER :- D
7. The modulation index in amplitude modulation is
(A) always zero
(B) between 0 and 1
(C) between 1 and
(D) none of these
ANSWER :- B
8. The capacitance of a parallel plate capacitor …….. by the introduction of a dielectric between the plates of the capacitor.
(A) increases
(B) decreases
(C) remains same
(D) nothing can be said
ANSWER :- A
9. The quantum of electric in e.s.u. is.
(A) 4.78 x 10-10
(B) + 1.6 x 10-19 charge
(C) 2.99 x 109
(D) – 1.6 x 10-19
ANSWER :- D
10. Electrostatic field is
(A) conservative
(B) non-conservative
(C) somewhere conservative and some where non-conservative
(D) none of these
ANSWER :- A
Question 11.
Light owes its colour to its
(a) frequency
(b) velocity
(c) phase
(d) amplitude
Answer:
(a) frequency
Question 12.
Power of an electric circuit is
(a) V . R
(b) V2 . R
(c) \(\frac{V^{2}}{R}\)
(d) V2 Rt
Answer:
(c) \(\frac{V^{2}}{R}\)
Question 13.
The electrric potential in equatorial position of an electric dipole is
(a) \(\frac{1}{4 \pi \varepsilon_{0}} \frac{p \cos \theta}{r^{2}}\)
(b) \(\frac{1}{4 \pi \varepsilon_{0}} \frac{p}{r^{2}}\)
(c) \(\frac{1}{4 \pi \varepsilon_{0}} \frac{p}{r}\)
(d) Zero
Answer:
(d) Zero
Question 14.
The working of the dynamo is based on the principle of
(a) Heating effect of current
(b) Electromagnetic induction
(c) Induced magnetism
(d) Induced electricity
Answer:
(b) Electromagnetic induction
Question 15.
The modulation index in amplitude modulation
(a) is always zero
(b) lies between 0 and 1
(c) lies between 1 and ∞
(d) Can never exceed 0.5
Answer:
(b) lies between 0 and 1
Question 16.
The solar spectrum is
(a) Continuous
(b) Line spectrum
(c) The spectrum of black lines
(d) The spectrum of black bands
Answer:
(a) Continuous
Question 17.
Unit of surface charge density is
(a) Coulomb/metre2
(b) Newton/metre
(c) Coulomb/Volt
(d) Coulomb-metre
Answer:
(a) Coulomb/metre2
Question 18.
The wavefront due to a point source at a finite distance from the source is
(a) Spherical
(b) Cylindrical
(c) Plane
(d) Circular
Answer:
(a) Spherical
Question 19.
The resistance of ideal ammeter is
(a) Zero
(b) very small
(c) very large
(d) infinite
Answer:
(a) Zero
Question 20.
When two bulbs of power 60 W and 40 W are connected in series, then the power of their combination will be
(a) 100 W
(b) 2400 W
(c) 30 W
(d) 24 W
Answer:
(d) 24 W
11. Kilowatt-hour (kWh) is the unit of
(A) power
(B) energy
(C) torque
(D) none of these
ANSWER :- B
12. A charge moving with uniform velocity produces
(A) only an electric field
(B) only a magnetic field
(C) electromagnetic field
(D) none of these
ANSWER :- C
13. SI unit of pole strength is
(A) N
(B) N/Am
(C) Am
(D) T
ANSWER :- C
14. The electrostatic field is
(A) conservative
(B) non-conservative
(C) both (A) and (B)
(D) none of these.
ANSWER :- A
15. 1 coulomb charge = ……………… e.s.u.
(A) 3 x 109
(B) 9×109
(C) 8.85 x 10-12
(D) none of these.
ANSWER :- A
16. The specific charge of electron is
(A) 1.8 x 1011 C/kg
(B) 1.8 x 10-19 C/kg
(C) 1.9 x 10-19 C/kg
(D) None of these
ANSWER :- A
17. The electrical resistance of a healthy man is
(A) 50,000
(B) 10,000
(C) 1,000
(D) 10
ANSWER :- A
18. Nickel is a
(A) paramagnetic
(B) diamagnetic
(C) ferromagnetic
(D) none of these
ANSWER :- A
19. The radius of curvature of plane mirror is
(A) infinite
(B) zero
(C) +5cm
(D) -5cm
ANSWER :- A
20. SI unit of power of a lens is
(A) joule
(B) dioptre
(D) watt.
(C) candela
ANSWER :- B
21. 64 identical drops each of capacity 5μF combine to form a big drop. What is the capacity of big drop ?
(A) 4 μF
(B) 25 μF
(C) 20 μF
(D) 164 μF
ANSWER :- C
22. A current flows in a wire of resistance 52 having potential difference 7 volt for 20 minutes. The heat produced is
(A) 140 cal
(B) 280 cal
(C) 700 cal
(D) 2800 cal
ANSWER :- D
23. The value of amplitude modulation index is
(A) always 0
(B) between 1 and ∞
(C) between 0 and 1
(D) always 1
ANSWER :- C
24. When a ray of light enters a glass slab its wavelength
(A) decreases
(B) increases
(C) remains unchanged
(D) data are not complete
ANSWER :- A
25. The unit of reactance is
(A)mho
(B) ohm
(C) farad
(D) ampere
ANSWER :- B
26. Write the decimal number 25 in binary.
(A) (1100)2
(B) (1001)2
(C)(11001)2
(D) (11101)2
ANSWER :- C
27. Which series comes in visible region of hydrogen spectrum ?
(A) Lyman series
(B) Balmer series
(C) Paschen series
(D) Brackett series
ANSWER :- B
Objective in hindi
निम्नलिखित में कौन सदिश राशी है :-
(a) आवेश
(b) धारिता
(c) विधुतीय-क्षेत्र
(d) विधुतीय-धारा
Ans:-(c)
Bihar board important question
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एक ही पदार्थ के धातु के दो गोले A तथा B दिये गये हैं। एक पर +Q आवेश तथा दूसरे पर -Q आवेश दिया गया है
विधुतीय-क्षेत्र में किसी विधुत द्विध्रुव को घुमाने में किया गया कार्य होता है :-
(a) W = pE(1 – cosθ)
(b) W = pE tanθ
(c) W = pE secθ
(d) None of these
Ans:-(a)
Sthir-vaidhutikee Objective
किसी दी गयी दूरी पर स्थित दो ईलेक्ट्रोनो के बीच क्रियाशील गुरुत्वाकर्षण बल एवं विधुतीय-बल क्रमशः Fg तथा Fe हो तो Fg/Fe का अनुपात होगा !!
(a) 9.8
(b) 10⁹
(c) 1042
(d) 10-42
Ans:-(d)
एकसमान विधुतीय-क्षेत्र में स्वतंत्र रूप से निलंबित विधुत-द्विध्रुव की स्थित-उर्जा का मान महत्तम होगा जब द्विध्रुव-आघूर्ण और विधुतीय-क्षेत्र के बीच का कोण हो :-
(a) 0
(b) π/2 rad
(c) π/4 rad
(d) π rad
Ans:-(d)
Yah class 12 ke lie vvi objective question hai jo hindi bhasha me hai aur yah physics ke electrostatics chapter ka objective question hai.
VVI Objective questions
(1) Electric field at the surface point of charge conductor is:-
(a) ε₀ σ
(b) σ/ε₀
(c) Zero
(d) σ/2ε₀
Ans:- (b)
Electrostatics objective questions
(2) Electric field at the inside point of charge conductor is:-
(a) ε₀ σ
(b) σ/ε₀
(c) Zero
(d) ε₀/2
Ans:- (c)
3. The electric field intensity at the surface of charge conductor is :-
(a) Zero
(b) Perpendicular to the surface
(c) Tangential to the surface
(d) at 450 to surface
Ans:-(b)
Exam most important objective
4. Electric field and Potential is inside the charged conductor is respectively:-
(a) constant, zero
(b) zero, constant
(c) infinite, variable
(d) variable, infinity
Ans:-(b)
5. Electric field intensity due to infinitely charge conducting sheet at near point is:-
(a) ε₀ σ
(b) σ/ε₀
(c) σ/2ε₀
(d) (1/2)ε₀ σ
Ans:-(c)
Bihar board objective
6. Work required for the moving of 2 C charges is 20J from one point to other, then potential difference between the point is :-
(a) 10
(b) 20
(c) 5
(d) 2
Ans:-(a)
Bihar board vvi question
7. Which of the following is a vector quantity?
(a) Charge
(b) Capacitance
(c) Electric field
(d) Electric current
Ans:-(c)
8. What is the work done due to rotation of electric-dipole in external electric field?
(a) W = pE(1 – cosθ)
(b) W = pE tanθ
(c) W = pE secθ
(d) None of these
Ans:-(a)
Bihar board objective pdf
9. Gravitational force and electric force between two electrons separated at some distance are Fg and Fe respectively, then Fg/Fe is:-
(a) 9.8
(b) 109
(c) 1042
(d) 10-42
Ans:-(d)
Question 31.
The value of the angle of dip at the earth’s magnetic pole is
(a) 0°
(b) 45°
(c) 90°
(d) 180°
Answer:
(c) 90°
Question 32.
The Boolean expression for NAND gate is
(a) Y = A + B
(b) Y = A . B
(c) Y = \(\overline{A+B}\)
(d) Y = \(\overline{\mathrm{A.B}}\)
Answer:
(d) Y = \(\overline{\mathrm{A.B}}\)
Question 33.
If +q charge is placed inside any spherical surface then total flux coming out from whole surface will be
(a) q × ε0
(b) \(\frac{q}{\varepsilon_{o}}\)
(c) \(\frac{\varepsilon_{o}}{q}\)
(d) \(\frac{q^{2}}{\varepsilon_{o}}\)
Answer:
(c) \(\frac{\varepsilon_{o}}{q}\)
Question 34.
In an alternating current circuit, the phase difference between current I and voltage is Φ, then the Wattless component of current will be
(a) I cos Φ
(b) I tan Φ
(c) I sin Φ
(d) I cos2 Φ
Answer:
(c) I sin Φ
Question 35.
Equivalent focal length of two lenses in contact having power -15D and +5D will be
(a) -20 cm
(b) -10 cm
(c) +10 cm
(d) +20 cm
Answer:
(b) -10 cm
10. Potential energy of an electric dipole in an external electric field is maximum, when angle between electric dipole and electric field is:-
(a) 0
(b) π/2 rad
(c) π/4 rad
(d) π rad
Ans:-(d)
Bihar Board 12th Physics VVI Objective Questions Model Set 3 in English
Question 1.
At constant potential difference, the resistance of any electric circuit is halved, the value of heat produced will be
(a) half
(b) double
(c) four times
(d) same
Answer:
(b) double
Question 2.
The power factor of L-R circuit is
(a) R + WL
(b) \(\frac{R}{\sqrt{R^{2}+W^{2} L^{2}}}\)
(c) \(\mathrm{R} \sqrt{\mathrm{R}^{2}+\mathrm{W}^{2} \mathrm{L}^{2}}\)
(d) \(\frac{\mathrm{WL}}{\mathrm{R}}\)
Answer:
(b) \(\frac{R}{\sqrt{R^{2}+W^{2} L^{2}}}\)
Question 3.
The stored energy, of a capacitor, charged to 100 V is 1 J. Capacitance of the capacitor is
(a) 2 × 104 F
(b) 2 × 104 F
(c) 2 × 102 F
(d) 2 × 10-2 F
Answer:
(b) 2 × 104 F
Question 4.
The current flowing in a wire is 1 A. If the charge of an electron is 1.6 × 10-19 C, then the number of, electrons flowing through the wire per second is
(a) 0.625 × 1013
(b) 6.25 × 1018
(c) 1.6 × 10-19
(d) 1.6 × 1019
Answer:
(b) 6.25 × 1018
Question 5.
The time in which radioactive substance becomes half of its initial amount is called
(a) average life
(b) half-life
(c) time – period
(d) decay constant
Answer:
(b) half-life
Question 6.
Deviation of a thin prism of refractive index n and angle of prism A is
(a) (1 – n) A
(b) (n – 1) A
(c) (n + 1) A
(d) (1 + n) A2
Answer:
(b) (n – 1) A
Question 7.
Two-point charges of +10 µc and -10 µc are placed at a distance 40 cm in air. The potential energy of the system will be
(a) 2.25 J
(b) 2.35 J
(c) -2.25 J
(d) -2.35 J
Answer:
(c) -2.25 J
Question 8.
A convex lens (n = 1.5) is immersed in water (n = 1.33), then it will behave as a
(a) Converging lens
(b) Diverging lens
(c) Prism
(d) Concave mirror
Answer:
(a) Converging lens
Question 9.
The susceptibility of a paramagnetic substance is
(a) Constant
(b) Zero
(c) Infinity
(d) Depends on the magnetic field
Answer:
(a) Constant
Question 10.
The energy of a photon of wavelength λ is
(a) hcλ
(b) \(\frac{h c}{\lambda}\)
(c) \(\frac{h \lambda}{c}\)
(d) \(\frac{\lambda}{h c}\)
Answer:
(b) \(\frac{h c}{\lambda}\)
Question 21.
In earth’s magnetic field BH, if the frequency of oscillation of a magnetic needle is n, then
(a) n ∝ BH
(b) n2 ∝ BH
(c) n ∝ BH2
(d) n2 ∝ \(\frac{1}{\mathrm{B}_{\mathrm{H}}}\)
Answer:
(b) n2 ∝ BH
Question 22.
The magnifying power of an astronomical telescope for normal adjustment is
(a) \(-\frac{f_{o}}{f_{e}}\)
(b) -f0 × fe
(c) \(-\frac{f_{e}}{f_{o}}\)
(d) -f0 + fe
Answer:
(d) -f0 + fe
Question 23.
In a step-up transformer, no. of turns in primary and secondary coils are N1 and N2, then
(a) N1 > N2
(b) N2 > N1
(c) N1 = N2
(d) N1 = 0
Answer:
(b) N2 > N1
Question 24.
The ratio of root mean square (rms) value and peak value of an alternating current is
(a) √2
(b) \(\frac{1}{\sqrt{2}}\)
(c) \(\frac{1}{2}\)
(d) 2√2
Answer:
(b) \(\frac{1}{\sqrt{2}}\)
Question 25.
Which one of the following has a maximum refractive index?
(a) glass
(b) water
(c) iron
(d) diamond
Answer:
(d) diamond
Question 26.
With the increase of temperature the resistivity of the semiconductor
(a) increases
(b) decreases
(c) remains constant
(d) becomes zero
Answer:
(b) decreases
Question 27.
Cylindrical lenses are used to correct the eye defect called
(a) myopia
(b) hypermetropia
(c) astigmatism
(d) presbyopia
Answer:
(c) astigmatism
Question 28.
The direction of propagation of electromagnetic wave is
(a) Parallel to \(\overrightarrow{\mathrm{B}}\)
(b) Parallel to \(\overrightarrow{\mathrm{E}}\)
(c) Parallel to \(\overrightarrow{\mathrm{B}} \times \overrightarrow{\mathrm{E}}\)
(d) Parallel to \(\overrightarrow{\mathrm{E}} \times \overrightarrow{\mathrm{B}}\)
Answer:
(d) Parallel to \(\overrightarrow{\mathrm{E}} \times \overrightarrow{\mathrm{B}}\)
Question 29.
The torque (\(\vec{\tau}\)) experienced by a current-loop of magnetic moment (\(\overrightarrow{\mathrm{M}}\)) placed in magnetic field \(\overrightarrow{\mathrm{B}}\) is
(a) \(\vec{\tau}=\overrightarrow{\mathrm{M}} \times \overrightarrow{\mathrm{B}}\)
(b) \(\vec{\tau}=\overrightarrow{\mathrm{B}} \times \overrightarrow{\mathrm{M}}\)
(c) \(\vec{\tau}=\frac{\vec{M}}{\vec{B}}\)
(d) \(\vec{\tau}=\overrightarrow{\mathrm{M}} \cdot \overrightarrow{\mathrm{B}}\)
Answer:
(a) \(\vec{\tau}=\overrightarrow{\mathrm{M}} \times \overrightarrow{\mathrm{B}}\)
Question 30.
The height of the TV tower at a certain place is 245 m. The maximum distance up to which its programme can be received is
(a) 245 m
(b) 245 km
(c) 56 km
(d) 112 km
Answer:
(c) 56 km
INTER EXAM QUESTION