A thin equi-convex lens is made of glass with refractive index 1.5, and its focal length is 0.2 m. If it acts as a concave lens of 0.5 m focal length when dipped in a liquid, the refractive index of the liquid is:
The point charges and are placed at a separation of 7 m. The medium between them is of two type as shown in figure. What is the electric force acting between them?
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Spheres A and B of equal radius and of masses 2 m and m, respectively, are moving towards each other and strike directly. The speeds of A and B before the collision are 3u and u, respectively. The collision is such that B experiences an impulse of 4mcu, where c is constant.
What is the coefficient of restitution?
Two long, parallel, horizontal rails, distance d apart and each having a resistance per unit length are joined at one end by a resistance R. A perfectly conducting rod MN of mass m is free to slide along the rails without friction (see the figure). There is a uniform magnetic field of induction B normal to the plane of the paper and directed into the paper. A variable force F is applied to the rod MN such that as the rod moves, constant current flows through R.
The magnitude of the emf induced in the loop is
Which of the following statements is false for the reaction H2 + Br2 2HBr?
The rate law is = k[H2][Br2]½ .
The compound [Co(H2O)6]2+, having three unpaired electrons, shows the experimental magnetic moment of 4.40 BM, while the theoretical calculated value is 3.87 BM. This is because of
Directions: In the given question, the first and the last parts of the paragraph are numbered 1 and 6. The rest of the paragraph is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Find out the correct combination.
1. Our pleasures should be healthy so that they can impart a sense of well-being.
P. This applies very much to the passion for sports.
Q. Some people become slaves to an enthusiasm and regard it as their real and only pleasure in life.
R. It is quite possible that indulging in this passion is doing them great harm.
S. Modern sports have become so exaggerated that they can damage and sometimes destroy one's health.
6. An enthusiasm for violent sports may well dig an early grave for the participant.
Directions: In the following question, choose the word which best fills the blank from the four options given.
Leisure should be utilised not in _______ away the time saved, but in engaging in some pleasurable activity.
When she learned that she could not attend the university in Warsaw, Marie felt
Directions: In the following question, four statements are provided. These statements form a coherent paragraph when properly arranged. Select the alternative representing the proper and logical sequencing of these statements.
A. Even in the depths of Japan's late-1990s recession, the country was still home to industrial world leaders and to some of the most respected brands in the global market.
B. They may well have done so as a consequence of government bullying to ensure that resources were poured into research and development but the results speak for themselves.
C. The Japanese economic lift-off did not come when companies were busy trying to make cheaper cars and cheaper electronic goods but when they started making products that were better than anything else in the market.
D. Japanese companies and the larger Korean companies are much more like Western organisations in terms of the resources they devote to business development.
Directions: This problem consists of a Question Figure followed by four Answer Figures (a), (b), (c) and (d). A part of the Question Figure is missing. Choose the Answer Figure which will complete the pattern in Question Figure.
Directions: Find the odd one out.
7, 8, 18, 57, 228, 1165, 6996
The radius of a cylinder is increasing at the rate of 3 m/s and its altitude is decreasing at the rate of 4 m/s. What is the rate of change of volume when radius is 4 m and altitude is 6 m?
If and are the roots of the equation x2 − px + 36 = 0 and 2 + 2 = 9, then the value of p is
Consider the lines given by L1: x + 3y - 5 = 0, L2: 3x - ky - 1 = 0 and L3: 5x + 2y - 12 = 0. If one of L1, L2 and L3 is parallel to at least one of the other two, then
2 videos|17 docs|85 tests
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2 videos|17 docs|85 tests
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