Karnataka 1st PUC Second Test Question Paper 2025 Physics

Government of Karnataka
Karnataka Secondary Education Examination Board

Question Papers
Quarterly Exam

SECOND QUARTERLY TEST DECEMBER 2025
CLASS:IPUC SUBJECT: PHYSICS (33) Max. Marks : 35
Time : 1Hr. 30 Mins.

PART-A
I. Pick the correct option among the four given options for all of the following: 7x1=7
1) The value of'g' becomes zero at
a) the height equal to the radius of the earth
b) the height equal to the diameter of the earth
c) the depth equal to half the radius of the earth
d) the depth equal to half the diameter of the earth
|2GM
2) has the dimensions of
R

a) velocity b) displacement c) acceleration d) force
3) Which of the following has highest elasticity ?
a) Copper b) Silver c) Steel d) Rubber
4) Bulk modulus for a perfectly rigid body is
a) unity b) infinite c) zero d) finite
5) Rise of oil inwick of lamp is due to
a) frictional force b) elasticity c) surface tension d) viscosity
6) When the temperature increases, the viscosity of
a) gases and liquids increases b)gases and liquids decreases
c)gases increases and liquids decreases d) gases decreases and liquids increases
7) Asphere, a cube anda thin circular plate, all of same material and same mass are initially
heated to same high temperature
a) Plate willcool fastest and cube the slowest
b) Sphere will coolfastest and cube the slowest
c)Plate will cool fastest and the sphere the slowest
d) Cube will cool fastest and Plate the slowest
II. Fill inthe blanks by choosing appropriate answers given in the brackets for all the
following questions: 3x1=3
[Mercury, Pressure, One, Zero]
8 Moduus of elasticity has the dimensions same as that of
9) has greatest viscosity.
10) The absorptive power of a perfectly black body is
PART-B
II. Answer any THREE of the following questions : 3x2=6
11) State and explain Newton's law of gravitation.
12) Mention any two types of modulus of elasticity.
13) Give any two applications of Pascal's law.
14) Define surface tension. Mention its SI unit.
15) What is anomalous expansion of water ?
(PT.O.)

-2
PART-C
IV. 3x3=9
Answer any THREE of the following questions :
16) State Kepler's laws of planetary motion.
17) Draw Stress-strain curve and indicate yield point and breaking point in the curve.
18) Derive an expression for liquid pressure at a point inside the liquid.
19) Give any three differences between streamline flow and turbulent flow of liquids.
1
20) Derive a =T for an ideal gas, where a = volume coefficient of expansion of gases.
PART-D
V. Answer any ONE of the following questions : lx5=5
21) Derive the expression for acceleration due to gravity at apoint (a) above the earth's surface
and (b) below the earth's surface.
22) State and explain the laws of thermalconductivity. Mention the SI unit of coeficient of thermal
conductivity.
VI. Answer any ONE of the following questions : lx5=5

23) Abody weighs 60 kg on the surface of earth. How much will it weigh on the surface of Jupter
1
whose mass is of the earth and radius that of the earth?
9 2
24) An iron sphere has radius of 10cm at a temperature of 0°C. Calculate the change in the
volume of the sphere, it is heated to 100°C. Coefficient of inear expansion of iron is
1lx10-6|°C.

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