ISC Class 12 Physics Sample Paper (1). Sample papers and question papers for ICSE and ISC students. These question papers have been collected by the best teachers from ICSE and ISC schools. Students should download and practice these papers to gain better marks in examinations.
Question 1
A. Answer all questions by choosing the correct option A, B, C or D.
(i) Three identical point charges, each of Q Coulomb, are kept at the three vertices of an equilateral triangle having each side = a. [See figure 1]. Electro-static potential energy of the system is:
(ii) Four cells E1 , E2 , E3 and E4 are connected as shown in Figure 2. Emf of the battery so formed is:
(A) 6V
(B) 12V
(C) 4V
(D) Zero
(iii) A 50 Ω non-inductive resistor is connected to a source which generates an emf e which is given by
e = 200 Sin (120 π t) Volt. Peak value of current flowing through the resistor is:
(A) 0.25 A
(B) 2.5 A
(C) 4.0 A
(D) 4 2 A
(iv) A thin converging lens of focal length 25 cm is kept in contact with a thin diverging lens of focal length 20 cm. Focal length of the combination is:
(A) + 100 cm
(B) -100 cm
(C) 45 cm
(D) 5 cm
(v) Photo electric threshold wavelength of a certain metal is 198 nm. Its work function is:
(A) 1×10−18 J
(B) 1 ×10-19 J
(C) 1 × 10− 16J
(D) 1 × 10− 17J
Please click below link ISC Class 12 Physics Sample Paper (1)