JAC Class 12 Physics Question Paper 2020 with Solution
JAC Class 12
Physics2020Download pdf solved JAC Class 12 Physics question paper 2020. Learn how to get higher marks with this in-depth solution of Physics for your JAC Board 12th exam.
Downloaded from jac.jharkhand.gov.in
About this paper
This is the Jharkhand Academic Council (JAC) Class 12 Physics paper from the 2020 board examination. It is printed for 70 marks and three hours, with a pass mark of 23, and an answer is written under each question. Group A has 15 objective questions of one mark, Group B eight of two marks, Group C eight of three marks and Group D three of five marks. Short questions include the field of an infinite line charge, resistance of a conductor, six electromagnetic waves in order of wavelength, and an AND gate followed by a NOT gate. One question places an object 60 cm from a concave lens of focal length 15 cm. Group D also prints a cyclotron, the torque on a coil, and the lens maker's formula.
- Exam
- JAC Class 12
- Subject
- Physics
- Year
- 2020
- Maximum marks
- 70
- Time allowed
- 3 hours
- Questions
- 20
- Pages
- 7
- Answers included
- Yes
Paper pattern
Group A
15 marks15 objective questions, one mark each
Group B
16 marks8 questions, two marks each
Group C
24 marks8 questions, three marks each
Group D
15 marks3 questions, five marks each, including a transformer as an alternative
Topics covered
- Electrostatics and electric field lines
- Current electricity and the potentiometer
- Magnetism and force on a current
- Electromagnetic induction
- Alternating current and transformers
- Electromagnetic waves
- Ray optics, lenses and interference
- Optical instruments
- Photoelectric effect
- Atoms and nuclei
- Semiconductors and logic gates
- Communication systems and modems
Questions from this paper
- What are electric field lines? Mention any two of their properties.
- An infinite line charge produces an electric field of 1.8×10⁵ N/C at a distance of 2 cm. Calculate the linear charge density.
- Name six types of electromagnetic waves in ascending order of wavelength.
- An object is placed 60 cm from a concave lens of focal length 15 cm. Determine the magnification.
- What is the photoelectric effect? Define threshold frequency and stopping potential.
- What is a transformer? Describe its principle, construction and working.
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