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12th vvi question 2021 के लेटेस्ट क्वेश्चन पेपर के साथ-साथ संपूर्ण प्रक्रिया बताया गया || कैसे डाउनलोड करें 12th vvi question math || 12th vvi question Hindi || 12th question science || 12th class vvi question || इस आर्टिकल में बताया गया है बिहार बोर्ड 12th क्लास की इनके बारे में यहां से आप किसी भी प्रकार का मॉडल पेपर डाउनलोड कर सकते हैं जैसे में: – साइंस के मॉडल पेपर, हिंदी मॉडल पेपर, इंग्लिश मॉडल पेपर, मैथ मॉडल पेपर इन सभी का आप बहुत ही आसानी से और पढ़ सकते हैं और डाउनलोड भी कर सकते हैं बहुत ही आसानी से नीचे दी गई जानकारी को पढ़े अगर आप दसवीं क्लास में है तो अच्छे नंबर से पास हो जाएंगे 2021 की परीक्षा में 👇👇👇👇
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1. The lectrical fiel ais n ed :unit fo
- r
- volt
Ampere
- ohm
- NC⁻¹
Ans:NC⁻¹
2. When a conductor is heated, its resistance :
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- Increases
- decreases
- remains constant
- depends upon the nature of the conductor
Ans:Increases
3. The electrical potential at a point inside a charged spherical shell is :
- Zero
- Constant
- Variable
- Maximum
Ans: Zero
4. What is the SI unit of magnetic dipole moment :
- Am²
- Am
- Am⁻²
- None
Ans: Am²5. Mention the S.I unit of a magnetic field :
- gauss
- Tesla
- Weber
- None
Ans: Tesla
6. Kirchoff loop rule is a direct consequence of low of conservation of :
- Charge
- Momentum
- Angular Momentum
- Energy
Ans: Energy
7. Lenz’s law is in accordance with the low of conservation of :
- Momentum
- Angular Momentum
- Charge
- Energy
Ans: Energy
8. Which of the Following can be Deflected by a magnetic field :
- α – rays
- β – rays
- γ – rays
- a & b Both
Ans: a & b Both
9. Name the electromagnetic radiation used for viewing objects through haze & fog :
- Infrared
- rays
- x-rays
- Microwaves None
Ans: Infrared
10. Which Colour of light gets deviated the most when sunlight passes through a prism :
- Red
- Yellow
- Violet
- Green
Ans: Violet
11. The radius of curvature of a mirror is 20 cm. What is its Focal length :
- 5 cm
- 10 cm
- 20 cm
- None
Ans: 10 cm
12. Electron & Proton are moving at the same speed. Which we having more Wavelength.
- Electron
- Proton
- Both Have Same
- None Of This
Ans: Electron
13. Which series of H-atom spectrum lies in the ultra-violet region :
- Balmer series
- Lyman series
- Pascher series
- None of this
Ans: Lyman series
14. What is Called Ratio Of Potential difference & Current :
- Resistance
- Resistivity
- Conduction
- none
Ans: Resistance
15. Electric current is Scalar or Vector :
- vector
- scalar
- neither vector & scalar
- none
Ans: scalar
16. If a wire stretched by a force, its resistance :
- Increases
- decreases
- remains constant
- None
Ans: Increases
17. The unit of electrical current density is :
- Am²
- Am
- Am⁻²
- Am⁻¹
Ans: Am⁻²
18. As temperature increases the conductivity of a semiconductor :
- Increases
- decreases
- remains constant
- None
Ans: Increases
19. Potential gradient has unit :
- vm
- vm⁻¹
- vm⁻²
- vm²
Ans: vm⁻¹
20. The SI unit for impedance is :
- ohm
- Henry
- Volt
- Ampere
Ans: ohm
21. The Caused of induced emf in a closed coil is :
- Magnetic field
- Magnetic flux
- Rotation of coil
- Change in Magnetic flux
Ans: Magnetic flux
22. The absolute permeability of free space in S.I units is :
- 1⁄4π×₁₀⁻⁷
- ₁₀⁻⁷
- 4π×₁₀⁻⁷
- 4π×₁₀⁷
Ans: 4π×₁₀⁻⁷
23. Which part of the electromagnetic spectrum is used in a radar system?
- Ultraviolet
- infrared
- Radio waves
- x rays
Ans: Radio waves
24. Critical Angle (C) and refractive index (µ) of medium are related as :
- µ = sin c
- µ = cos c
- µ = tan c
- µ = cosec c
Ans: µ = cosec c
25. MeV is the unit for :
- Voltage
- Current
- Power
- Energy
Ans: Energy
26. Farad is unit for :
- Electric current
- electric potential
- Energy
- capacitance
Ans: capacitance
27. A positively charged body has :
- excess of electron
- deficit of electrons
- excess of proton
- deficit of proton
Ans: excess of proton
28. As a temperature rises, the resistance of a conductor :
- Increases
- decreases
- remains constant
- depends upon the nature of the conductor
Ans: Increases
29. Zener diode is used for :
- Oscillations
- amplifications
- rectification
- voltage stabilization.
Ans: voltage stabilization
30. eV is a unit for :
- potential difference
- power
- energy
- momentum
Ans: energy
12th vvi question 2021 के लेटेस्ट क्वेश्चन पेपर के साथ-साथ संपूर्ण प्रक्रिया बताया गया || कैसे डाउनलोड करें 12th vvi question math || 12th vvi question Hindi || 12th question science || 12th class vvi question || इस आर्टिकल में बताया गया है बिहार बोर्ड 12th क्लास की इनके बारे में यहां से आप किसी भी प्रकार का मॉडल पेपर डाउनलोड कर सकते हैं जैसे में: – साइंस के मॉडल पेपर, हिंदी मॉडल पेपर, इंग्लिश मॉडल पेपर, मैथ मॉडल पेपर इन सभी का आप बहुत ही आसानी से और पढ़ सकते हैं और डाउनलोड भी कर सकते हैं बहुत ही आसानी से नीचे दी गई जानकारी को पढ़े अगर आप दसवीं क्लास में है तो अच्छे नंबर से पास हो जाएंगे 2021 की परीक्षा में 👇👇👇👇