Free online Physics MCQ test series for IITJEE, NEET, AIPMT, Engineering and Medical Joint Entrance Exams - GRAVITATION

Physics MCQs and practice questions on randomly selected topics from the chapter “Gravitation” helpful for IITJEE, NEET, other national and state level engineering and medical Joint Entrance Exams, MBBS Admission Tests such as - All India Pre-Veterinary Test, NAT (National Aptitude Test), ISAT (IIST Admission Test) and other competitive examinations.

Physics MCQ Test Series on Gravitation

Kepler’s laws of planetary motion. Laws of Gravitation - the universal law of gravitation. Acceleration due to gravity and its variation with altitude and depth. Gravitational Forces. Gravitational potential energy and Field; Escape velocity, orbital velocity of a satellite. Geostationary satellites. Motion of planets and satellites in circular orbits.

Physics Practice Questions MCQs: Gravitation

Multiple Choice Questions (MCQs) – Set 1 (Q. No. 1 - 10)

Question 1: Satellite is revolving around earth. If it’s radius of orbit is increased to 4 times of the radius of geostationary satellite, what will become its time period:

a. 8 days    b. 4 days    c. 2 days     d. 16 days

Question 2: Which of the following quantities related to planets remains same during their motion in elliptical orbits as seen from the sun?

a. Angular speed    b. Speed    c. Kinetic energy    d. Angular momentum

Question 3: The value of G depends upon

a. The mass of bodies               b. The medium between the bodies

c. The temperature of bodies    d. It is an independent constant

Question 4: The gravitational force between two stones of mass 1 kg each separated by a distance of 1 metre in vacuum is –

a. Zero    b. 6.675 x 10^-5 newton    c. 6.675 x 10^-11 newton    d. 6.675 x 10^-8 newton

Question 5: A body of mass ‘m’ taken from the earth’s surface to the height equal to twice the radius (R) of the earth. The change in potential energy of body will be

Question 6: If radius of earth is R then the height h at which the value of g becomes one-fourth is:

a. 2R    b. 3R    c. R    d. 4R

Question 7: A planet moves faster at

a. Aphelion    b. Perihelion   c. Focus    d. It travels with uniform speed

Question 8: An object is placed at a distance of R/2 from the centre of earth. Knowing mass is distributed uniformly, acceleration of that object due to gravity at that point is: (g = acceleration due to gravity on the surface of earth and R is the radius of earth)

a. g    b. 2g    c. g/2    d. none of these

Question 9: Find the false statement

a. Gravitational force acts along the line joining the two interacting particles  

b. Gravitational force is independent of medium

c. Gravitational force forms an action-reaction pair                                          

d. Gravitational force does not obey the principle of superposition

Question 10: A geostationary satellite is orbiting the earth at a height of 5R above that surface of the earth, R being the radius of the earth. The time period of another satellite in hours at a height of 2R from the surface of the earth is

View / Download Answers [pdf]

Gravitation - Solved Practice Questions / Test Series

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• NEET, IITJEE, AIPMT, VITEEE, Engineering and Medical Entrance Tests Practice Questions on Newton’s Laws of Motion and Friction

IITJEE Advanced to become totally computer based from 2018

The IITJEE Advanced (Joint Entrance Examination Advanced), which governs B Tech admissions to the Indian Institutes of Technology, is likely to become a completely computer-based admission test from 2018. 
Also read: CBSE announced tentative dates for IITJEE Main and JEE Advanced 2018 

As per the current practice in IITJEE Advanced, candidates are given options of taking the examination in the computer mode, possible only at a handful of centres, or through pen-and-paper mode which is preferred by most of the students. If the exam becomes completely computer based, every center will be provided the questions through a CD or encrypted file. Then the students will have to open the question paper on a computer and answer a question with a click of the mouse almost similar to the pattern of the Common Admission Test (CAT) conducted by the Indian Institutes of Management.

Advantages of Computer-based IITJEE Advanced

• An entirely computer-based test would lead to faster evaluation.
• Save time of manual distribution and collection of answer papers and also scanning them.
• Improve fairness by removing possibility of scan failing to read an improperly blackened circle.

Further, to avoid repeats and string of flawed or ambiguous questions set, one of the possible solutions suggested has been a pre-prepared Question bank, screened thoroughly for ambiguity and other defects.

PROPOSALS ABOUT IITJEE ADVANCED

·     Fully computer-based test

·     More than one test a year

·     A question bank of 25000 questions

·     A mix of questions of varying difficulties, assessed on a scale of 1 to 10

·     Results in percentile instead of percentage, scores

America's Scholastic Aptitude Test (SAT), conducted for undergraduate admissions, set 90 per cent of the questions from a bank while the rest are experimental questions that carry no marks. If the students, unaware which questions are experimental and forced to attempt all, do not find the experimental questions ambiguous, opaque or too difficult, these are added to the question bank.

If the proposal for a question bank is cleared, each of the bank's suggested 25000 questions may be graded on a difficulty scale of 1 to 10 to ensure a judicious mix of harder and easier questions.

The ministry of HRD wants the questions to be such that Class 11 and 12 students can comfortably answer them. Currently, all the questions in a particular section of the paper carry identical marks. But under the proposed system, a question's difficulty level will dictate how many marks it carries. The ministry also wants the results to be declared in terms of candidate's percentile score as done in CAT, GATE etc.

What is percentile and how percentile score is calculated?

A candidate's percentile is the number of students ranked below him divided by the number that took the exam, and the dividend multiplied by 100.

However, it is not clear why the ministry believes this would be a better system. IIT Kanpur will conduct the JEE Advanced 2018.

(Source: Telegraph, edited)

Prepare for NEET, IITJEE, Engineering and Medical Entrance Tests Practice Questions on Newton’s Laws of Motion and Friction

Physics > Newton's Laws of Motion and Friction
MCQ test series, practice questions with solutions for NEET, IITJEE, VITEEE, MBBS and BDS Entrance Exams, Engineering Entrance Exams; MBBS Admission Tests and other competitions.

Expected questions from some of these topics (Syllabus):

Force and Inertia; Law of Inertia; Newton’s First Law of Motion; Center of Mass; Momentum; Newton’s Second Law of Motion; Impulse; Newton’s Third Law of Motion; Law of Conservation of Linear Momentum and its applications; Variable Mass; Free Body Diagrams; Pulleys; Equilibrium of Concurrent Forces; Constraint Equations; Pseudo Force; Static and Kinetic Friction; Laws of Friction; Rolling Friction; Centripetal Force and its applications; Impulse; Collision

Physics: Newton’s Laws of Motion and Friction

Multiple Choice Questions (MCQs) – Set 1 (Q. No. 1 - 10)

Question 1: A particle is moving with a constant speed along a straight line path. A force is required to:

a. Increase its speed

b. Decrease the momentum

c. Change the direction

d. Keep it moving with uniform velocity

(1) a, b, c, d   (2) b, c, d   (3) a, b, c   (4) a, b, d

Question 2: Swimming is possible by

a. Newton’s laws of gravitation

b. Newton’s first law of motion

c. Newton’s second law of motion

d. Newton’s third law of motion

Question 3: The frictional force is –

a. Self-adjustable

b. Not self-adjustable

c. Scalar quantity

d. Equal to the limiting force

Question 4: When a body is stationary –

a. There is no force acting on it

b. The force acting on it not in contact with it

c. The combination of forces acting on it balances each other

d. The body is in vacuum

Question 5: A player caught a cricket ball of mass 150 g moving at a rate of 20 m/s. If the catching process is completed in 0.1 s, the force of the blow exerted by the ball on the hand of the player is equal to –

a. 150 N

b. 3 N

c. 30 N

d. 300 N

Question 6: Two blocks are converted over a massless pulley as shown in figure. The mass of block A is 10 kg and the coefficient of kinetic friction is 0.2. Block A slides down the incline at constant speed. The mass of block B in kg is:

a. 5.4

b. 3.3

c. 4.2

d. 6.8

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Question 7: A body of weight W₁ is suspended from the ceiling of a room through a chain of weight W₂. The ceiling pulls the chain by a force:

a. W₁

b. W₂

c. W₁ + W₂

d. W₁ + W₂/2

Question 8: Choose the correct statement –

a. Friction force always opposes the motion of the body

b. The direction of the force of friction always opposes the tendency of relative motion of a body

c. The coefficient of kinetic friction is usually greater than the coefficient of static friction

d. Friction force depends on the surface area of contact

Question 9: It is easier to pull a body than to push, because –

a. The coefficient of friction is more in pushing than that of pulling

b. The friction force is more in pushing than that in pulling

c. The body does not move forward when pushed

d. None of these

Question 10: A horizontal jet of water coming out of a pipe of area of cross-section 20 cm² hits a vertical wall with a velocity of 10 ms^-1 and rebounds with the same speed. The force exerted by water on the wall is –

a. 0.2 N

b. 10 N

c. 400 N

d. 200 N

View / Download Answers [pdf]

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Physics Guide and Solutions for Engineering (JEE Main, JEE Advanced) and Medical (NTA NEET, AIPMT) aspirants, NTSE, KVPY

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CBSE to ensure uniformity of NEET questions

11-Aug-17

NEET Questions to be Uniform

The Supreme Court asked CBSE on 10th Aug to ensure the uniformity of NEET Question papers (National Eligibility-cum-Entrance Test) in English, Hindi and all regional languages from 2018 to avoid complaint of unequal competition. The court, however, iterated is decision not to be set aside the 2017 NEET results or stay the ongoing counselling for medical (MBBS and BDS) admissions arose the country as it might disturb the process involving the careers of over 6 lakh students.

"We want commonality in exams and identical question papers in English, Hindi and regional languages (from) nextyear. We want you (CBSE) to consult experts and file an affidavit as to how you are going to implement uniformity of NEET standards," a bench of Justices  told additional solicitor-general Maninder Singh, appearing for CBSE.

On June 12,SC had cleared the decks for the declaration of this year's NEET results for admission to MBBS and BDS courses across the country, staying a Madras High Court order that had poor an embargo on the publishing on the ground that it would be subject to the final outcome of a batch of petitions filed by students challenging the exams. The students had claimed that the questions in Tamil and other regional languages were comparatively easier than those in English, alleging violation of Article 14 of the Constitution that guarantees equality.

Hence, SC pulled up CBSE for setting different NEETquestion papers in English, Hindi and regional languages. The court told senior advocate Indira Jaising, appearing for some students, that it would be difficult to disturb the admission process as over 6 lakh students had passed NEET this year.

The bench said if the questions are uniform across languages, it will help the students select the language of their choice. Justice Misra said that if the NEET questions are uniform, the evaluation of the students will also be uniform. He adorned the matter to10th October.

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In the slog months, when a prospective candidate is badly in need of best practice questions, test series to revise, strengthen and sharpen his/her memory, our Free study materials, practice papers - the answers, hints and solutions of practice test papers; online mock tests would provide much needed all round practice as per the latest entrance exam trends and test pattern.

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