CBSE Physics Class 12 Additional Practice Questions 2023-24 PDF

CBSE ADDITIONAL PRACTICE QUESTIONS Physics-Theory Class XII | 2023–24 Maximum marks: 70 Time Allowed: 3 hours General instructions...

CBSE ADDITIONAL PRACTICE QUESTIONS Physics-Theory Class XII | 2023–24 Maximum marks: 70 Time Allowed: 3 hours General instructions: 1. There are 33 questions in all. All questions are compulsory. 2. This question paper has five sections: Section A, Section B, Section C, Section D, and Section E. 3. All the sections are compulsory. 4. Section A contains sixteen questions, twelve MCQ and four Assertion Reasoning based of 1 mark each, Section B contains five questions of two marks each, Section C contains seven questions of three marks each, Section D contains two case study based questions of four marks each and Section E contains three long answer questions of five marks each. 5. There is no overall choice. However, an internal choice has been provided in one question in Section B, one question in Section C, one question in each CBQ in Section D and all three questions in Section E. You have to attempt only one of the choices in such questions. 6. Use of calculators is not allowed. Q.No Questions Marks SECTION A 1 An electric dipole having a dipole moment of 4 × 10-9 C m is placed in a 1 uniform electric field such that the dipole is in stable equilibrium. If the magnitude of the electric field is 3 × 103 N/C, what is the work done in rotating the dipole to a position of unstable equilibrium? A. zero B. 1.2 × 10-5 J C. 2.4 × 10-5 J D. - 1.2 × 10-5 J 2 An infinite line of charge has a linear charge density of 10 -7 C/m. 1 What will be the magnitude of the force acting on an alpha particle placed at a distance of 4 cm from the line of charge? A. 14.4 × 10-15 N B. 7.2 × 10-15 N C. 4.5 × 104 N D. 9 × 104 N 1 3 The graph below shows the variation of the maximum kinetic energy of the 1 emitted photoelectron with the frequency of the incident radiation for a given metal. Which of the following gives the work function of the metal? A. x-intercept B. y-intercept C. the slope of the graph D. the area under the graph 4 When an electron in an atom moves from the ground state to a higher energy 1 level what happens to its kinetic and potential energies? kinetic energy potential energy A increases Increases B increases Decreases C decreases Increases D decreases Decreases 5 Two long and straight current-carrying wires, P and Q are placed parallel to 1 each other separated by a distance of 10 cm. A wire 'R' of length 8 cm and carrying a current of 4 A is placed between the two wires P and Q as shown below. 2  If the wire R, experiences a net force towards wire P, then which of the following is definitely TRUE about the current 'I' in wire Q? A. Current I cannot be in the upward direction. B. Current I can have any magnitude greater than 0 A in the upward direction. C. Current I cannot have a magnitude of more than 15 A in the upward direction. D. Current I cannot have a magnitude of more than 10 A in the upward direction. 6 A rod when suspended in a uniform magnetic field aligns itself perpendicular 1 to the magnetic field as shown below. Which of the following statements is/are true for the rod? P) Every atom in the rod, has a zero magnetic moment. Q) The rod is attracted when taken near the poles of a strong magnet. R) The relative permeability of the material of the rod is slightly less than 1. S) The susceptibility of the material of the rod is directly proportional to temperature. A. only Q B. only P and R C. only Q and S D. only R and S 3 7 Three students construct a solenoid of length 35 cm. They are each given 1 insulated copper wire of the same length. The table below lists some details about the solenoids made by them. Magnetic field Radius of Core of solenoid produced solenoid Student 1 B1 3 cm air Student 2 B2 3 cm iron Student 3 B3 6 cm air Compare the magnetic field produced by the solenoids made by the three students. A. B1=B3