PHYSICS
CLASS:2ND YEAR
BOARD: FEDERAL
ASSIGNMENT CHAPTER NO:11 MCQS
1. . If the distance between two charges is doubled and the charges are also doubled then the force between them becomes:
a) Remain same b) Half c) Double d) Eight times Reason/Hints___________________________________________________________________
2. Acceleration of a particle heaving charge q and mass m through an electric field E is:
a) q/mE b) q/qE c) qE/m d) E/qm Reason/Hints___________________________________________________________________
3. When an electron, traveling in a vacuum, enters a uniform electric field E arranged at right angles to its path, in which direction will it deflect:
a) In the direction of E into a parabolic path
b) In the direction opposite to E into a parabolic path
c) In the direction of E into a circular path
d) In the direction opposite to E into a circular path Reason/Hints___________________________________________________________________
4. The electric intensity outside the two oppositely charged parallel metal plates is______
a) Maximum b) Minimum c) Zero d) Infinite Reason/Hints___________________________________________________________________
5. In case of parallel plate capacitor, if the plate separation is doubled and plate area is halved the capacitance become________;
a) Four hold b) One half c) One fourth d) Zero Reason/Hints___________________________________________________________________
6. Two small spheres carry equal and opposite electric charges. The electric field strength at a point ‘X’ mid-way between the spheres is ‘E’. If the distance from spheres to X is double, then what will be the new electric field strength X?
a) E/8 b) E/4 c) E/2 d) 2E Reason/Hints___________________________________________________________________
7. Which of the following is SI unit of permittivity ϵ0?
a) Nm2c-2 b) Nm-2c c) N-1m2c2 d) C2N-1m-2 Reason/Hints___________________________________________________________________
8. At given point the value of E is 4Nc-1. If 1m2 area is held perpendicular to the field lines, how many fields lines will be pass through it at this point?
a) Zero b) 4 c) 16 d) 40 Reason/Hints__________________________________________________________________
9. Time constant is defined as the time required by the capacitor to deposit ________ times the equilibrium charge qe.
a) 0.53 b) 0.63 c) 0.69 d) 0.707 Reason/Hints___________________________________________________________________
10. Electron-volt is a unit of_________
a) Charge b) Energy c) Potential d) Charge density Reason/Hints___________________________________________________________________
11. A capacitor has a charge Q.The actual charge on its plates are_______
a) Q,Q b) Q/2,Q/2 c) Q,-Q d) Q/2,-Q/2 Reason/Hints___________________________________________________________________
12. Electric field and potential difference inside a hollow charge conducting sphere are _____
a) 0,0 b) 1/4πε0.q/e , 0 c) 0, 1/4πε0.q/e d) None of these Reason/Hints___________________________________________________________________
13. The SI unit of relative permittivity εr are________
a) c2/N-m2 b) N-m2/c2 c) Nm/c d) No units Reason/Hints___________________________________________________________________
14. The ratio of gravitational force Fg to the electrostatic force Fe between two electrons, the same distance a part is__________
a) 9.8 b) 24x1042 c) 24x109 d) 24x10-44 Reason/Hints___________________________________________________________________
15. It is required to suspend a proton of charge q and mass m in an Electric field. The strength of field must be__________
a) E= mg/qv b) E= q/mg c) E= mg/q d) E= qvsinθ/q Reason/Hints___________________________________________________________________
16. Dielectric placed between the plates of a charged capacitor can_________
a) Decrease the potential difference
b) Reduce the electric intensity
c) Increase the valve of capacitance
d) All of these Reason/Hints___________________________________________________________________
17. A capacitor stores energy in its:________
a) magnetic field b) electric field c) coil d) battery Reason/Hints___________________________________________________________________
18. Work done in moving a positive charge on an equipotential surface is:
a) Finite and positive b) Finite and negative c) Infinite d) Zero Reason/Hints___________________________________________________________________
19. The slope of potential distance graph provides:
a) Electric potential b) Magnetic Induction c) Electric field Intensity d) Electrostatic force Reason/Hints___________________________________________________________________
20. The direction of field lines due to a test charge “+q” is:
a) Circular b) Curve c) Radically outward d) Radically inward Reason/Hints__________________________________________________________________
No comments:
Post a Comment