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Showing posts with label class12-Physics. Show all posts
Showing posts with label class12-Physics. Show all posts

# JEE NEET PHYSICS MCQs (Set-5)

Topics Covered: Laws of Motion, Circular Motion

Q1: In a tug-of-war match, one team is pulling with a force of 500 N. If they are exactly balanced by the other team, then the tension in the rope is?

(a) 0
(b) 250 N
(c) 500 N
(d) 1000 N

Q2: A particle of mass 0.3 kg is subjected to a force F = kx with k= 15 N/m. What will be its initial acceleration if it is released from a point 20 cm away from the origin.

(a) 3 m/s²
(b) 15 m/s²
(c) 5m/s²
(d) 10 m/s²  # JEE NEET PHYSICS MCQs (Set-4)

Topics Covered: Vector Algebra, Motion in a Plane

Q1: If θ is the angle between two vectors, then the resultant vector is maximum when the value of θ is

(a) 0°
(b) 90°
(c) 180°
(d) Same in all cases.

Q2: The change in a vector may occur due to

(a) Rotation of the frame of reference
(b) Translation of frame of reference
(c) Rotation of vector
(d) Both a and b

Q3: Acceleration of a particle under projectile motion at the highest point of its trajectory is :

(a) g
(b) zero
(c) less than g
(d) dependent upon projection velocity  ## PHYSICS MCQs (Set-3)

FOR JEE NEET Med/Engineering Entrance Examinations

Topics Covered: Kinematics (Motion in a Straight Line)

Q1: A particle starts from rest with uniform acceleration 'a' Its velocity after 'n' second is 'v'. The displacement in last two seconds is:

(a) 2v(n-1)/n
(b) v(n-1)/n
(c) v(n+1)/n
(d) 2v(2n+1)/n

Q2: A body starts from origin and moves along x-axis such that at any instant velocity is v = 4t³ - 2t. The acceleration of the particle when is it is 2m away from the origin is:

(a) 14 m/s²
(b) 18 m/s²
(c) 22 m/s²
(d) 32 m/s²  ## JEE NEET PHYSICS MCQs (Set-2)

FOR NEET - IIT JEE and Other Engineering or premedical Entrance Examinations

Topics Covered: Units & Dimensions, Error in Measurement

Q1: Which of the following sets cannot enter into the list of fundamental quantities in any system of unit

(a) length, mass and velocity
(b) length, time and velocity
(c) mass, time and velocity
(d) length, time and mass

Q2: The base quantity among the following is:

(a) Speed
(b) Weight
(c) Length
(d) Area  ## PHYSICS MCQs  (SET-1)

FOR NEET - IIT JEE and Other Engineering or premedical Entrance Examinations

Q1: A neutron with velocity v strikes a stationary deuterium atom, its kinetic energy changes by a factor of

(a) 15/16
(b) 1/2
(c) 2/1
(d) 8/9

Q2: AM radio band has carrier frequency from 500 kHz to 1500 kHz. Assuming a fixed inductance in a simple LC circuit, what is  ratio of highest capacitance to lowest capacitance required to cover this frequency range?

(a) 3
(b) 6
(c) 9
(d) 12  ## CBSE Class 12 Sample Question Papers With Marking Scheme (2019-20)

CBSE has released sample question papers along with marking scheme based on the new curriculum. Sample Papers for Class 12 are taken into consideration as the best option to understand the question paper pattern very well.

Eduvictors provide collection of sample question papers prepared by various schools and institutes
that help you to practice and get familiar with the question paper pattern. Solving an ample variety of sample papers, together with the last years' pattern papers, has been the recommendation to students.

Here are links of SQPs and Marking Schemes for various subjects:  ## Major Changes in CBSE Examination in 2020 For Class 10 and 12

CBSE has made some changes in the examination pattern for class 10 and 12 in the academic
session 2019-20.

As per the new exam pattern, CBSE has given more weight to the school-based/internal assessment.

Please watch the video to get the idea of important changes that would happen in CBSE Examination in 2020 i.e. for academic session 2019-20  ## CBSE Class 12 - Physics Term-I Sample Question Paper (Set-1) (2019-20) (Poor Scan Quality)

Getting good marks is very important for students of class 12. For this one must practice and attempt sample question papers within time limits.

Here follows a sample question paper on Physics subject to assess your knowledge about the subject.

For studying you may refer following help guides:

2.  ## Physics Quiz for NEET, AIPM and JEE

MCQs

Q1: Wavelength of a LASER beam can be used as a standard of

(a) Time
(b) Temperature
(c) Angle
(d) Length

Q2: A mercury barometer is enclosed in a tall glass cylinder. What happens to the level of mercury if air is slowly removed from the enclosure by a vacuum pump? The level

(c) remains unchanged
(d) suddenly falls to zero

Q3: Which of the following is not a thermodynamic function?

(a) enthalpy
(b) work done
(c) internal energy
(d) Gibb's energy  ## CBSE Class 12 - Physics Sample Question Paper + Solution- (2018-19)

Physics is a study of basic laws of nature and their manifestation in different natural phenomena. Physics is the study of physical world and matter and its motion through space and time, along with related concepts such as energy and force. The class 11 syllabus provides logical sequencing of the ‘Units’ of the subject matter with proper placement of concepts with their linkages for better understanding.

Here follows the class 12  Physics sample question paper along with marking scheme and answers helping you in your studies.  Class 12 Physics

## Dual Nature Of Radiation and Matter

Q1: Write the relationship of de-Broglie wavelength λ associated with a particle of mass m in terms of its kinetic energy K.

Answer: Kinetic Energy (K) = p²/2m
where p = momentum and m = mass.
∴ p = √2mK

∴ de-Broglie wavelength λ = h/p = h/ √2mK

Q2: Mention one physical process for the release of an electron from the surface of a metal?

Q3: Name an experiment which shows the wave nature of the electron. Which phenomenon was observed in this experiment using an electron beam?

Answer: Davisson-German experiment shows the wave nature of the electron. Phenomena of constructive interference were observed in the Davisson-Germer experiment.

Q4: What is Thermionic emission?

Answer: It is the phenomenon of emission of electrons from the metal surface when heated suitably.  ## Physics Quiz (1 Word Answer)

Q1: Who firstly demonstrated experimentally the existence of electromagnetic wave?

Q2: The working of the quartz crystal in the watch is based on which effect?

Q3: What is the unit of Radioactivity?

Q4: What is the wavelength of the visible spectrum?

Q5: One astronomical unit is the average distance between___?

Q6: Number of basic S.I. units are ___.

Q7: What is the name of the scientist who stated that matter can be converted into energy?

Q8: The size of the atomic nucleus is of the order of___?

Q9: A temperature at which both the Fahrenheit and the centigrade scales have the same value?  ## Saturday, 6 October 2018

### Class 12 - Physics - ELECTROMAGNETIC WAVES AND OPTICS - About Electromagnetic Spectrum? (#cbsenotes)(#eduvictors)

Class 12 - Physics - ELECTROMAGNETIC WAVES AND OPTICS -

Name Wavelength range Production Uses
Gamma Rays 10⁻ⁱ²m Gamma rays produced in the radioactive decay of the nucleus In the treatment of cancer and to carry out nuclear reactions.
X-Rays 10⁻⁹m - 10⁻ⁱ²m x-rays tubes or inner shell electrons Used as a diagnostic tool in medical to find out fractures in bones. to find cracks, flaws in the metal part of a machine
UV Rays 4×10⁻⁷m - 10⁻⁹m By very hot bodies like the sun and by UV lamps. In water purifier
in the detection of forged documents, in food preservation.  ## Cathode Rays and Its Properties Image Credits: Wikipedia, Author: Theresa Knott

Q1: What are Cathode Rays?

Answer: are streams of electrons observed in vacuum tubes. These rays were discoevered by a German physicist Johann Wilhelm Hittorf, and were named in 1876 by E. Goldstein, or cathode rays. In 1897, British physicist J. J. Thomson experimented and showed that cathode rays were composed of negatively charged particles, called electrons. Cathode rays are also called as electrons beam.

When a potential difference of 10 to 15 kV is applied across the two electrodes of a discharge tube and pressure is reduced to 0.01mm of mercury, the rays known as cathode rays are emitted from the cathode. These rays are independent of the nature of the gas in the discharge tube and their direction of propagation is not affected by the position of the anode.

Q2: What are the properties of Cathode Rays?  ## Wave Optics

(Important Theory Questions)

Q1. Define wave front. State Huygens principle and verify Snell’s law.

Q2. State Huygens principle and prove the laws of reflection on the basis of wave theory.

Q3. What do you mean by interference of light? Explain in brief the Young’s double slit experiment.

Q4. What are the coherent sources? Write the conditions for the sustained interference pattern. Also draw the intensity v/s path difference curve.  ## Ray Optics

(Important Theory Questions)

1. Derive mirror formula for a concave mirror and convex mirror.

2. Derive an expression for lateral shift and normal shift. On what factors these depend.

3. Define TIR and write the conditions for TIR. Derive a relation between critical angle and the refractive index of the medium. Also explain the working of isosceles prism and optical fiber.

4. Derive the following relation for a real image formed by a convex refracting surface when the object is placed in rarer medium. Also write the assumptions and sign convention used.

μ₂ / v - μ₁/u = (μ₂ - μ₁) / R  ## Electromagnetic Waves

(Important Theory Questions)

1. Explain the inadequacy of Ampere's circuital law

2. Describe Hertz experiment to demonstrate the production of electromagnetic waves

3. Write the properties of electromagnetic waves.

4. Write any five electromagnetic waves in the order of decreasing frequency and write any two properties and uses of each

5. Deduce an expression for velocity of em waves in vacuum.

6. Establish the transverse nature of electromagnetic waves.

7. Compare the properties of electromagnetic waves and mechanical waves.  ## Alternative Current

(Important Theory Questions)

1. Describe the principle construction and working of an AC generator. Draw neat labeled diagram

2. Define mean value of AC(over a half cycle) and derive an expression for it.

3. Define RMS value of AC and derive an expression for it. ()

4. Show that the average value of AC over a complete cycle is zero.

5. Show that the current and voltage are in phase in an ac circuit containing resistance only.  ## Electromagnetic Induction (EMI)

(Theoretical Questions Assignment)

1. State and Explain Faraday's laws of electromagnetic induction.()

2. State Lenz' Law and show that it is in accordance with the law of conservation of energy.

3. Use Lenz' law to find the direction of induced emf in a coil when
(a) a north pole is brought towards the coil
(b) north pole taken away from the coil
(c) A south pole isbrought towards the coil and
(d) a south pole is taken away from the coil,
Draw illustrations in each case.  ## Magnetic Effect of Current

(Theoretical Questions)

1. State Biot- Savart law and apply it to find the magnetic field due to a circular loop carrying current at a point (a) at its centre (b) on the axis

2. State Ampere's circuital law and apply it to find the magnetic field (a) inside a current carrying solenoid (b) inside a current carrying toroid.

3. Apply Ampere's circuital law to determine the magnetic field at a point due to a long straight current carrying conductor.

4. Derive an expression for the force on a current carrying conductor in a uniform magnetic field  