Physics Bihar board VVI Objective Questions : बिहार बोर्ड फिजिक्स मोस्ट VVI ऑब्जेक्टिव क्वेश्चन।

Physics Bihar board VVI Objective Questions

Bihar board Class 12th Physics Most VVI Objective Questions

1. if an electric dipole is kept in a uniform electric field then resultant electric force on it, is :

(A) always zero
(B) never zero
(C) depend upon capacity of dipole
(D) none

Ans – (A)

2. which one of the following is the unit of electric field ?

(A) Coulomb
(B) Newton
(C) Volt
(D) N/C

Ans – (D)

3. if square of bad conductor is given charge then it is distributed on :

(A) surface
(B) inside the surface
(C) only inside the surface
(D) None

Ans – (D)

4. electric field in a cavity of metal :

(A) depend upon the surroundings
(B) depend upon the size of cavity
(C) is always zero
(D) is not necessarily zero

Ans – (D)

5. when placed in a uniform field, a dipole experiences :

(A) a net force
(B) a torque
(C) both are net force and torque
(D) neither are net force nor a torque

Ans – (B)

6. A parrot comes and sits on a bare high power line. It will :

(A) experience a mild shock.
(B) experience a strong shock.
(C) get killed instantaneously.
(D) not be affected practically

Ans – (D)

7. the unit of intensity of electric field is :

(A) Meter / Volt
(B) Joule / Newton
(C) Coulomb / Newton
(D) Newton / Coulomb

Physics Bihar board VVI Objective Questions

Ans – (D)

8. during lightning ……… charge in transferred to the earth :

(A) positive
(B) negative
(C) both positive and negative
(D) none

Ans – (B)

9. when electrons are removed from an uncharged body, the body :

(A) gets negatively charged
(B) gets positively charged
(C) gates negatively or positively charged depending upon its size
(D) remains uncharged

Ans – (B)

10. when velocity of charge body increase its charge ?

(A) may increase
(B) may decrease
(C) may increase or decrease
(D) does not charge

Ans – (D)

11. the capacitance of a capacitor will decrease if we introduce a slab of :

(A) copper
(B) aluminium
(C) zinc
(D) none of these

Ans – (D)

12. in which of the following forms is the energy stored in a capacitor ?

(A) charge
(B) potential
(C) Capacitance
(D) electric field

Ans – (D)

13. choose the SI unit of electric potential energy :

(A) Joule
(B) Coulomb
(C) Newton per Coulomb
(D) Erg

Ans – (A)

14. choose the vector physical quantity :

(A) Electric flux
(B) Electric potential
(C) Electric potential energy
(D) Electric intensity

Ans – (D)

15. The electric potential of earth is taken as :

(A) zero
(B) infinity
(C) unity
(D) none of these

Ans – (A)

Bihar board Physics Objective Questions

16. the potential gradient at which dielectric of the condenser just gets punctured, is known as :

(A) Dielectric constant
(B) Dielectric strength
(C) Dielectric resistance
(D) Dielectric number

Ans – (B)

17. The specific resistance of a conductor increases with :

(A) increase of temperature
(B) increase of cross-sectional area
(C) decrease in length
(D) decrease of cross-sectional area

Ans – (A)

18. the resistance of ammeter is :

(A) small
(B) large
(C) very small
(D) very large

Ans – (C)

19. a hot wire ammeter measures :

(A) average value of alternating current
(B) root mean square value of alternating current
(C) instantaneous value of alternating current
(D) pack value of alternating current

Ans – (B)

20. the algebraic sum of all currents meeting at any point in an electrical circuit is :

(A) infinite
(B) positive
(C) zero
(D) negative

Ans – (C)

21. principal of Wheatstone’s bridge is used in as :

(A) galvenometer
(B) potentiometer
(C) ammeter
(D) voltameter

Ans – (B)

22. source of solar energy is :

(A) nuclear fission
(B) nuclear fusion
(C) both A and B
(D) none of these

Ans – (B)

Physics Objective Questions

23. Wheatstone’s bridge compares :

(A) resistances
(B) currents
(C) potential difference
(D) all of these

Ans – (A)

24. the direction of the flow of current through electric circuit is :

(A) from low potential to high potential
(B) from hypotential to low potential
(C) does not depend upon potential value
(D) current cannot flow through circuit

Ans – (B)

25. the electrical resistance of a conductor depends upon :

(A) size of conductor
(B) temperature of conductor
(C) geometry of conductor
(D) all of above

Ans – (D)

26. which of the following is the same in parallel connection of resistance ?

(A) potential difference
(B) current
(C) both potential difference and current
(D) none of these

Ans – (A)

27. The value of yellow colour in colour code of carbon resistance is :

(A) 1
(B) 2
(C) 3
(D) 4

Ans – (D)

28. the algebraic sum of changes in potential around any closed loop in a circuit involing resistors and cells in a closed loop is :

(A) more than zero
(B) less than zero
(C) zero
(D) constant

Ans – (A)

Physics Bihar board VVI Objective Questions

29. The breadth and height of a metallic cuboid are equal and the length of the cuboid is twice that of its breadth. The ratio of the maximum and the minimum resistance between parallel faces is :

(A) 8
(B) 4
(C) 2
(D) none of these

Ans – (A)

30. Kirchhoff’s first and second laws for electrical circuits are consequences of :

(A) conservation of energy
(B) conservation of electrical charge and energy respectively
(C) conservation of electric charge
(D) neither conservation of energy nor electric charge

Ans – (B)

31. a galvenometer acting as a voltmeter will have …… with its coil :

(A) a high resistance in parallel
(B) a high resistance in series
(C) a low resistance in parallel
(D) a low resistance in series

Ans – (B)

32. why is the Wheatstone bridge more accurate then other methods of measuring resistances :

(A) it is a null method
(B) it is based on Kirchhoff’s laws
(C) it has four resistances
(D) it does not involve ohm’s law

Ans – (A)

33. copper wire is used as connecting wire because :

(A) copper has high electrical resistivity
(B) copper has low electrical resistivity
(C) copper has low electrical conductivity
(D) copper has high value of elasticity

Ans – (B)

Most VVI Objective Questions

34. the specific resistance of a conductor increases with :

(A) increase in temperature
(B) increase in cross-sectional area
(C) decrease in length
(D) decrease in cross-sectional area

Ans – (A)

35. the current through a conductor is doubled, the rate of rice of temperature in the conductor will be :

(A) halved
(B) doubled
(C) four times
(D) uncharged

Ans – (C)