12th Std/ Plus Two/ +2 Model Question Paper : Physics www.jac.nic.in Jharkhand
Name of the Council : Jharkhand Academic Council
Subject : Class XII Physics
Website : jac.nic.in
Document Type : Model Question Paper
Downloads :
Class 12Th Model Questions (2014) :
Physics Set I : https://www.pdfquestion.in/uploads/46-PHYSICS_SET_1.pdf
Physics Set II : https://www.pdfquestion.in/uploads/46-PHYSICS_SET_II.pdf
Physics Set III : https://www.pdfquestion.in/uploads/46-PHYSICS_SET_III.pdf
Class 12Th Sample Questions (2014) :
Physics :
Unit – I : https://www.pdfquestion.in/uploads/46-Unit%20-%20I.pdf
Unit – II : https://www.pdfquestion.in/uploads/46-Unit%20-%20II.pdf
Unit – III : https://www.pdfquestion.in/uploads/46-Unit%20-%20III.pdf
Unit – IV : https://www.pdfquestion.in/uploads/46-Unit%20-%20IV.pdf
Unit – V : https://www.pdfquestion.in/uploads/46-Unit%20-%20V.pdf
Unit – VI : https://www.pdfquestion.in/uploads/46-Unit%20-%20VI.pdf
Unit – VII : https://www.pdfquestion.in/uploads/46-Unit%20-%20VII.pdf
Unit – VIII : https://www.pdfquestion.in/uploads/46-Unit%20-%20VIII.pdf
Unit – IX : https://www.pdfquestion.in/uploads/46-Unit%20-%20IX.pdf
Unit – X : https://www.pdfquestion.in/uploads/46-Unit-%20X.pdf
JAC Class XII Model Question Papers
Group – A
1. (i) Farad is a unit for :
(a) Electric current
(b) Electric potential
(c) Energy
(d) Capacitance.
Related : Jharkhand Academic Council Biology Model Test Question 2015 : www.pdfquestion.in/7252.html
(ii) A positively charged body has :
(a) excess of electrons
(b) deficit of electrons
(c) excess of protons
(d) deficit of protons.
(iii) The electric potential due to a small electric dipole at a large distance (r) from the centre of dipole is proportional to :
(a) r
(b) 1/r
(c) 1/r2
(d) 1/r3
(iv) As temperature rises, the resistance of a conductor :
(a) Increases
(b) decreases
(c) remains constant
(d) depends upon nature of conductor.
(v) Drift vel. of free electrons in a conductor does not depend upon its :
(a) temperature
(b) length
(c) Area of cross-section
(d) material.
(vi) Two long parallel wires each carrying a current of IA, are placed Im apart. The force of attraction between them is :
(a) 2 X 10 -7 Nm-1
(b) 2 X 10 -4 Nm-1
(c) ½ X 10 -7 Nm-1
(d) 4 X 10 -7 Nm-1.
(vii) If the magnetic field is parallel to a surface, then the magnetic flux through the surface is :
(a) zero
(b) small but not zero
(c) infinite
(d) large but not infinite.
(viii) Electromagnetic waves can be deflected by :
(a) electric field only
(b) magnetic field only
(c) both electric & magnetic field
(d) none of these.
(ix) The power of a lens is 5D. Its focal length is :
(a) 20 cm
(b) 5 cm
(c) 25 cm
(d) 50 cm.
Group B
Group-A ( 1 mark each) :
1. How many electrons constitute one coulomb of negative charge?
2. What is the cause of charging?
3. Is mass of a body affected of charging?
4. Consider three charged bodies P, Q and R. If P and Q repel each other and P attracts R. What is the nature of force between Q and R?
5. What is the minimum charge ?
6. A glass rod rubbed with silk acquires a charge + 1.6×10-12C. What is the charge on the silk?
7. What is the origin of frictional electricity?
8. What is the value of charge on an electron? (Is a charge less than this value possible?
9. What is the dimensional formula of o?
10. Four charges of same magnitude and same sign are placed at the corners of a square of each side 0.1 m. What is electric field intensity at the centre of the square?
11. Is electric field intensity a scalar or a vector?
12. What is the unit of electric field intensity?
13. When is the net torque on an electric dipole in an electric is field maximum?
14. What is the net force on a dipole in uniform electric field?
15. When is an electric dipole in stable equilibrium in an electric field?
16. What is the direction of dipole moment?
17. When is an electric line of force straight?
18. Give the S.I unit of electric moment of a dipole?
19. Two point charges of +3μc each are 100cm apart. At what point on the line joining the charges will the electric intensity be zero?
20. What is the amount of work done in moving a 200nc charge between two points 5cm apart on an equipotential surface?
21. Name the physical quantity which has its unit joule/coulomb.
22. Does the electric potential increase or decrease along the electric line of force?
23. What is electric flux? Is electric flux a scalar or a vector?
24. What is the unit of electric flux?
25. What is the dielectric constant of metal?
What is rate constant?
Rate constant is a coefficient of proportionality relating the rate of a chemical reaction at a given temperature to the concentration of reactant (in a unimolecular reaction) or to the product of the concentrations of reactants.
Farad is a unit for?