BISE Multan · Class 11 · Physics

BISE Multan · Class 11 · Physics · 2026 · First Annual · Group 1 · New course

2026 · First Annual

Transcribed from the identified examination paper. Check the board, session and course before use. SchoolOrbit is not affiliated with the issuing board.

Objective

Source code: 2471 · Printed marks: 17 · Time: 20 Minutes

Q.No.1

You have four choices for each objective type question as A, B, C and D. The choice which you think is correct, fill that bubble in front of that question number, on bubble sheet. Use marker or pen to fill the bubbles. Cutting or filling two or more bubbles will result in zero mark in that question.

1
If least count is $10 k g$ then $8.00 \times 10^{3} k g$ has significant figures:
- (A)
  $1$
- (B)
  $2$
- (C)
  $3$
- (D)
  $4$
2
Range of projectile at $30^{\circ}$ with horizontal is same at an angle of:
- (A)
  $45^{\circ}$
- (B)
  $40^{\circ}$
- (C)
  $90^{\circ}$
- (D)
  $60^{\circ}$
3
In rotational motion analogous of force is:
- (A)
  Torque
- (B)
  Inertia
- (C)
  Velocity
- (D)
  Momentum
4
Ratio between orbital velocity and escape velocity is:
- (A)
  $\sqrt{2}$
- (B)
  $\frac{1}{\sqrt{2}}$
- (C)
  $2$
- (D)
  $1$
5
In isothermal process internal energy of system:
- (A)
  Increases
- (B)
  Decreases
- (C)
  Remains constant
- (D)
  Becomes infinity
6
A $20 m$ high tank is full of water. A hole appear at middle, speed of efflux will be:
- (A)
  $10 m / s e c$
- (B)
  $14 m / s e c$
- (C)
  $11.5 m / s e c$
- (D)
  $9.8 m / s e c$
7
Pressure will be low when speed of fluid is:
- (A)
  Zero
- (B)
  Low
- (C)
  Constant
- (D)
  High
8
Distance covered by wave in one second is:
- (A)
  Wave length
- (B)
  Wave number
- (C)
  Wave speed
- (D)
  Frequency
9
Distance between Node and Next Antinode is:
- (A)
  $λ$
- (B)
  $\frac{λ}{4}$
- (C)
  $\frac{λ}{2}$
- (D)
  $2 λ$
10
Which of the given is a primary source of gravitational waves?
- (A)
  Binary black hole merger
- (B)
  Solar flares
- (C)
  Earthquake
- (D)
  Solar wind
11
Number of electrons in one Coulomb charge are equal to:
- (A)
  $1.6 \times 10^{- 19}$
- (B)
  $6.02 \times 10^{- 19}$
- (C)
  $6.25 \times 10^{- 20}$
- (D)
  $6.25 \times 10^{18}$
12
The force between charges is $28 N$ when paraffin wax of relative permittivity $2.8$ is introduced as medium force will be:
- (A)
  $12 N$
- (B)
  $15 N$
- (C)
  $10 N$
- (D)
  $20 N$
13
Work done by magnetic force on moving charge is:
- (A)
  $B q v I$
- (B)
  Zero
- (C)
  $F^{- 1} \cdot d^{- 2}$
- (D)
  $q v B d$
14
Which of the given relation is correct?
- (A)
  $1 W b - m^{- 2} = 1 N A^{- 1} m^{- 1}$
- (B)
  $1 T e s l a = 10^{4} g a u s s$
- (C)
  $1 G a u s s = 10^{- 4} T e s l a$
- (D)
  All of these
15
If speed of light were infinite then moving mass is:
- (A)
  $\infty$
- (B)
  Zero
- (C)
  $m_{o}$
- (D)
  $2 m_{o}$
16
$1 u =$
- (A)
  $931 M e V$
- (B)
  $931 e V$
- (C)
  $1.6606 \times 10^{- 27} k g$
- (D)
  Both A and C
17
Which one of the carbon isotopes is unstable?
- (A)
  $_{6}^{14} C$
- (B)
  $_{6}^{12} C$
- (C)
  $_{6}^{13} C$
- (D)
  Both B and C
17(N)(Obj)(✶)-2026(1st-A)-28000 (MULTAN)

Subjective

Printed marks: 68 · Time: 2.40 Hours

PHYSICS (NEW COURSE) PAPER-I GROUP-I

SUBJECTIVE

NOTE: Write same question number and its parts number on answer book, as given in the question paper.

SECTION-I

2.

Write the answers of any eight parts.

8 × 2 = 16

(i)
What is meant by uncertainty in a measurement?
(ii)
How many significant figures in the given measurements? (i) $285 k m$ (ii) $28.0025 m$ (iii) $0.0085 g$ (iv) $235.0 m$
(iii)
State right hand rule for two vectors with reference to vector product.
(iv)
Why does a hunter aiming a bird in a tree miss the target exactly at the bird?
(v)
State second law of motion in case of rotation.
(vi)
If angular velocity of different particles of a rigid body is constant, will the linear velocity of these particles be also constant?
(vii)
Define angular acceleration. Give its formula and unit.
(viii)
An electric fan rotating at $3 r e v s^{- 1}$ in switched off. It comes to rest in $18.0 s$ . Find value of acceleration.
(ix)
A body falls towards the earth in air. Will its total mechanical energy be conserved?
(x)
What is the escape velocity from the surface of a planet with mass $2 \times 10^{24} k g$ and radius $4 \times 10^{6} m$ ? $(G = 6.67 \times 10^{- 11} N m^{2} / k g^{2})$
(xi)
A $5 k g$ object is moving with an initial velocity of $2 m / s$ . A force acts on it, doing $20 J$ of work. What is its final velocity?
(xii)
When will you say that a force is conservative? Give two conditions.

3.

Write the answers of any eight parts.

8 × 2 = 16

(i)
Write condition for a body to float in a fluid.
(ii)
What is Stoke's law? Write its limitation.
(iii)
Differentiate between streamline and turbulent flow of fluid.
(iv)
The ratio stress/strain remains constant for small deformation. What will be effect on this ratio when the deformation made is very large?
(v)
Why change in internal energy $Δ U = 0$ in an isothermal process?
(vi)
State second law of thermodynamics in two different forms.
(vii)
What are conditions for path difference in constructive and destructive interference?
(viii)
A string vibrate in its second harmonic with a frequency of $200 H z$ . Find the fundamental frequency and wavelength if the string length is $0.5 m$ .
(ix)
How should a source of sound move with respect to an observer so that the frequency of its sound does not change?
(x)
What is meant by diffraction of waves? For what purpose, the ripple tank is used?
(xi)
Write the applications of polarization in the fields of medical science and astronomy.
(xii)
What is the significance of detecting gravitational waves?

4.

Write the answers of any six parts.

6 × 2 = 12

(i)
Prove that $1 e V = 1.6 \times 10^{- 19} J$ .
(ii)
Is the filament resistance lower or higher in a $500 W$ – $220 V$ light bulb than in a $100 W$ – $220 V$ bulb?
(iii)
An uncharged conducting hollow sphere is placed in the field of a positive charge $q$ . What will be the net flux through the shell?
(iv)
Describe the factors affecting EMF.
(v)
What is ferrofluid and why it is invented?
(vi)
Define motional emf. Also give its relation.
(vii)
According to equation $E = m c^{2}$ , at is possible to create a single electron from energy? Explain.
(viii)
What are Mesons? Give example.
(ix)
How would you explain the energy of alpha and beta particles in a radioactive decay with the help of graphs?

SECTION-II

NOTE: Write answers of any three questions.

3 × 8 = 24

5.
(a)
What is precision and accuracy also write a note on moment of inertia.
(5)
(b)
A $20 g$ ball hits the wall of a squash court with a constant force of $50 N$ . If the time of impact of force is $0.50 s e c$ , find the impulse.
(3)
6.
(a)
State Archimedes's principle. Discuss the interconversion of potential energy and kinetic energy ignoring the frictional force.
(5)
(b)
The turbine in a steam power plant takes steam from boiler at $427^{\circ} C$ and exhausts into a low temperature reservoir at $77^{\circ} C$ . What is the maximum possible efficiency?
(3)
7.
(a)
What is Laser Interferometer Gravitational Wave Observatory(LIGO)? Describe basic components and working of Gravitational Wave Interferometer.
(5)
(b)
A radio antenna broadcasts $500$ watts of power. If the signal is received at a distance of $10 k m$ , what is the intensity of the signal?
(3)
8.
(a)
State and explain Kirchhoff's Second Rule.
(5)
(b)
A metallic rod is moving through a uniform magnetic field of $0.2 T$ . The emf induced across its ends is found to be $0.8 V$ . It is required induce an emf of $2.4 V$ across its ends. How much field strength is needed for this?
(3)
9.
(a)
Explain the four fundamental forces of nature. Compare their relative strengths and ranges.
(5)
(b)
Find the mass $m$ of a moving object with speed of $0.8 c$ .
(3)

Original source references (5)

The original files and numbering are retained. Equivalent files do not repeat the questions above.

Objective · 2471 · Printed marks: 17 · Time: 20 Minutes
Objective · 2473 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Objective · 2475 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Objective · 2477 · Printed marks: 17 · Time: 20 Minutes : same questions, source numbering preserved separately
Subjective · psp_da8f66c1332554d894ef9f4d259c8997 · Printed marks: 68 · Time: 2.40 Hours