Question
| Column A | Column B |
| 1. Rolling friction | a. making grooved designs |
| 2. Static friction | b. regular oiling |
| 3. Reducing friction | c. a book placed on a table top |
| 4. Increasing friction | d. wheels of a car |
| Column A | Column B |
| 1. Rolling friction | a. making grooved designs |
| 2. Static friction | b. regular oiling |
| 3. Reducing friction | c. a book placed on a table top |
| 4. Increasing friction | d. wheels of a car |
| Column A | Column B |
| 1. Rolling friction | d. wheels of a car |
| 2. Static friction | c. a book placed on a table top |
| 3. Reducing friction | b. regular oiling |
| 4. Increasing friction | a. making grooved designs |
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| Column A | Column B |
| 1. Transparent object | i. Shadows |
| 2. Eclipses | ii. Glass |
| 3. Translucent object | iii. Fluorescent tube |
| 4. Luminous object | iv. Tracing paper |
| Column A | Column B |
| A) Steel | 1) to store magnets |
| B) Soft iron | 2) temporary magnet |
| C) Use in electric bell | 3) permanent magnet |
| D) Magnetic keepers | 4) electromagnet |
| Column A | Column B |
| 1. Work done | a. sound energy |
| 2. Burning of charcoal | b. solar energy into electrical energy |
| 3. Coiled spring in a watch | c. heat energy |
| 4. Vibrating bodies | d. force X displacement |
| 5. Solar cells | e. elastic potential energy |
| Column A | Column B |
| 1. A dark patch formed behind an opaque body, when it is placed in the path of light. | (a) Umbra |
| 2. A kind of shadow where no ray of light enters. | (b) Penumbra |
| 3. A kind of shadow partially illuminated by light. | (c) Shadow |
| 4. Characteristics of image formed by a pinhole camera. | (d) Lunar eclipse |
| (e) Real and inverted |
| 1. Length | a. kilogram |
| 2. Mass | b. cubic metre |
| 3. Area | c. metre |
| 4. Volume | d. square metre |
| Column A | Column B |
| (a) Needle | (1) class II lever |
| (b) Doorknob | (2) inclined plane |
| (c) Ramp | (3) wedge |
| (d) Lemon crusher | (4) Wheel and axle |
| Column A | Column B |
| 1. A machine whose parts are frictionless as well as weightless. | (a) Simple machine |
| 2. In an device, output energy is less than input energy. | (b) Ideal machine |
| 3. The ratio between the output energy and the input energy. | (c) Machine |
| 4. The machine such as handle of water pump or a ramp. | (d) Principle of machine |
| (e) Efficiency of machine |
| 1. Increasing pressure | a. broad straps of shoulder bags |
| 2. Decreasing pressure | b. thrust |
| 3. Force acting per | c. sharp tips of pins unit area |
| 4. SI unit of pressure | d. pressure |
| 5. Magnitude of force | e. pascal |
| Column A | Column B |
| 1. A thin and pointed magnetized steel needle used for finding geographic directions. | (a) Soft iron |
| 2. A pair of soft pieces of iron used in storing bar magnets. | (b) Steel |
| 3. A magnet which loses its magnetism as soon as the cause producing it is removed. | (c) Magnetic needle |
| 4. A material used for making permanent magnets. | (d) Electromagnet |
| (e) Magnetic keeper |
| Column A | Column B |
| 1. The formula of the chemical present in natural magnet. | (a) Ferromagnetic substances |
| 2. Name of substance made by mixing ferric oxide and barium oxide. | (b) Fe204 |
| 3. A freely suspended magnetic strip used for finding geographic directions. | (c) Magnetism |
| 4. A group of four metals which can be easily magnetized. | (d) Ferrite |
| (e) Magnetic needle |