Exam (elaborations)

Physics model test papers

4 views 0 purchase

Course
Physics

Institution
Sixth Year / 12th Grade

These are the model papers for physics exams to practice with keys for cbse board exams which includes these lessons Electrostatics Current electricity Magnetism Alternating current Electromagnetic induction Electromagnetic waves Ray optics Wave optics Atoms Nuclei Semiconductors

[Show more]

Preview 2 out of 7 pages

View example

Uploaded on August 15, 2024
Number of pages 7
Written in 2024/2025
Type Exam (elaborations)
Contains Questions & answers

physics model test papers cbse board exams

Institution Secondary school
Course
Physics
School year 5

CA$10.23

Added

Add to cart

Add to wishlist

100% satisfaction guarantee
Immediately available after payment
Both online and in PDF
No strings attached

MODEL PAPER - 4
PHYSICS
Maximum Marks: 70 Time Allowed:3 hours

General Instructions:
1) There are 33 questions in all. All questions are compulsory.
2) This question paper has five sections: Section A, Section B, Section C, Section D and
Section E.
3) All the sections are compulsory.
4) Section A contains sixteen questions, twelve MCQ and four Assertion Reasoning based
of 1 mark each, Section B contains five questions of two marks each, Section C contains
seven questions of three marks each, Section D contains two case study based questions
of four marks each and Section E contains three long answer questions of five marks
each.
5) There is no overall choice. However, an internal choice has been provided in one
question in Section B, one question in Section C, one question in each CBQ in Section
D and all three questions in Section E. You have to attempt only one of the choices in
such questions.
6) Use of calculators is not allowed.
7) You may use the following values of physical constants where ever necessary.
i. c = 3 x 108 m/s
ii. me = 9.1 x10-31 kg
iii. e = 1.6 x 10-19 C
iv. µ0 = 4π x 10-7 Tm𝑨 −𝟏
v. h = 6.63 x10-34 J s
vi.
ε0 = 8.854 x10-12 𝑪 𝟐𝑵−𝟏𝒎−𝟐
vii. Avogadro’s number = 6.023 X 𝟏𝟎𝟐𝟑 per gram mole

SECTION- B

Q. Question Marks
No.

17 A conductor of length ‘l’ is connected to a dc source of potential ‘V’. If the 2
length of the conductor is tripled by gradually stretching it, keeping ‘V’
constant, how will
(i) drift speed of electrons and
(ii) resistance of the conductor be affected? Justify your answer.
18 (a) Arrange the following electromagnetic waves in the descending order of 2
their wavelengths.
Microwaves, γ-rays, Ultraviolet radiation, Visible light

(b) Write one use of above waves having lowest and highest wavelength.
19 The refractive index of a material of a concave lens is μ1. It is immersed in a 2
medium of refractive index μ2. A parallel beam of light is incident on the lens.
Trace the path of emergent rays when

, i) μ2 > μ1
ii) μ2 < μ1
20 Draw suitable graphs to show the variation of photoelectric current(Ip) with 2
collector plate potential (V) for

i) a fixed frequency but different intensities I1 > I2 > I3.
ii) a fixed intensity but different frequencies ν1 > ν2 > ν3.

21 Explain, with the help of a suitable diagram, how (i) depletion layer and (ii) 2
potential barrier is formed in a p-n junction diode.
OR

Draw a circuit diagram of a full wave rectifier. Draw the input and output
waveforms indicating clearly the functions of the two diodes used.

SECTION-C

22 Two long straight parallel conductors carry study currents I1 and I2 separated by a 3
distance d. If the current are flowing in the same direction, show how the
magnetic field setup in one produces an attractive force on the other. Obtain the
expression for this force. Hence define one ampere.

OR

(a) With the help of labelled diagram, explain the underlying principle and
working of a moving coil galvanometer.
(a) What is the function of (i) uniform radial field (ii) soft iron core, in such a
device?
23 Three lenses focal lengths + 10 cm, - 10 cm and +30 cm are arranged coaxially 3
as in the figure given below. Find the position of the final image formed by the
combination.

24 Draw a plot showing the variation of binding energy per nucleon with mass 3
number A. Write two important conclusions which you can draw from this plot.
25 Define self inductance and write its SI unit. Obtain an expression of self 3
inductance of a solenoid of length ‘l’ cross-sectional area ‘A’ having ‘N’ no. of
turns.
26 In the network shown in fig. Calculate currents I1, I2 and I3. 3

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller warimahes670. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for CA$10.23. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

81989 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling