# Physics Specimen Paper Sec-B 2024 Solved for ISC Class-12

Physics Specimen Paper Sec-B 2024 Solved for ISC Class-12. Step by step solutions as council prescribe guideline of model sample question paper.  During solutions of Physics specimen paper we explain with figure , graph, table whenever necessary. student can achieve their goal in next upcoming exam of council. Visit official website CISCE for detail information about ISC Board Class-12.

## ISC Class-12 Physics Specimen Paper 2024 Solved sec-B

 Board ISC Class 12th (xii) Subject Physics (Section-B) Topic ISC Specimen Paper Solved Syllabus on Revised syllabus Session 2023-24

### ISC Class-12 Physics Specimen Paper 2024 Solved sec-B

Warning :- before viewing solution view Question Paper

Time Allowed: Three hours

(Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time).

• This paper is divided into four sections – A, B, C and D.
• Section A consists of one question having sub-parts of one mark each.
• Section B consists of seven questions of two marks each.
• Section C consists of nine questions of three marks each, and
• Section D consists of three questions of five marks each.
• Internal choices have been provided in two questions each in Section B, Section C and Section D.
• The intended marks for questions are given in brackets [ ].
• All working, including rough work, should be done on the same sheet as and adjacent to the rest of the answer.
• Answers to sub parts of the same question must be given in one place only.
• A list of useful physical constants is given at the end of this paper.
• A simple scientific calculator without a programmable memory may be used for calculations.

### SECTION B – 14 MARKS

ISC Class-12 Physics Specimen Paper 2024 Solved sec-B

#### Question 2.

(i)

(a) State Gauss’ theorem.
(b) What is the SI unit of electric flux?

OR

(ii) Calculate the equivalent capacitance C´ if n identical capacitors each of capacitance C are connected in series.

#### Question 3.

A hollow charged metallic sphere of radius R carries a charge Q. How much work has to be done in moving a charge q on its surface through a distance d? Explain.

#### Question 4.

(i) What is meant by pair annihilation?
(ii) Give any one example where energy is converted to matter.

#### Question 5.

(i) Figure 2 given below shows a part of Wheatstone bridge circuit. With the help of Kirchhoff’s loop rule, calculate the current flowing through the 4Ω resistor. ……………..

(ii) In an experiment conducted to determine the internal resistance of a cell, its emf is balanced against a p.d. across 110cm of the potentiometer wire. The balancing length becomes 100cm when the cell is shunted by a resistance of 10Ω. Calculate the internal resistance of the cell.

#### Question 6.

(i) On which principle do optical fibres work?
(ii) What is a thin prism?

#### Question 7.

(i) State any one application of microwaves.
(ii) Which one of the following rays/waves is NOT an electromagnetic wave?
X rays; UV rays; γ rays; matter waves.

#### Question 8.

(i) What is motional emf?
(ii) A 220V ac voltage is to be converted to 33,000V ac voltage. What kind / type of transformer will you use?

–: Visit also :–