# Bihar board 12th Physics : बिहार बोर्ड के परीक्षार्थी परीक्षा से पहले एक बार यह प्रश्न जरूर पढ़ें, महत्वपूर्ण प्रश्न 2023.

Bihar board 12th Physics : बिहार बोर्ड के परीक्षार्थी परीक्षा से पहले एक बार यह प्रश्न जरूर पढ़ें

शार्ट रिवीजन परीक्षा से पहले एक बार जरूर पढ़े हैं आपके काम देगा या ऑब्जेक्टिव प्रश्न।

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

Ans – (D)

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

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

Ans – (B)

## Bihar Board Important Questions

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)

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)

### Bihar board 12th Physics

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)

इसी प्रकार के और भी प्रश्न पढ़ने के लिए आप गूगल पर सर्च करें Real Yojana को बहुत सारे महत्वपूर्ण प्रश्न इस पर मिलेंगे। बिहार बोर्ड से जुड़ी खबरों के लिए हमारे व्हाट्सएप ग्रुप से जुड़ जाए।