10th
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- 1. Fill in the blanks and rewrite the sentence. a. The amount of water vapour in air is determined in terms of its--------- Answer: The amount of water vapour in air is determined in terms... 1
- 11. Identify the figures and explain their use. (a) Figure (a) is cartridge type fuse which is fitted with costly appliances like refrigerator, AC, geyser, TV etc. They have a proper curre... 1
- Name the following diagrams and explain the concept behind them. a. It represents Fleming's right hand ruleused for finding the direction of induced current with respect to the directions of the magnetic f... 1
- What is a solenoid? Compare the magnetic field produced by a solenoid with the magnetic field of a bar magnet. Draw neat figures and name various components. A solenoid is a long straight insulated wire, such as a copper coil, often wrapped around a cylinder-shaped body. The diameter of the soleno... 1
- Which of the statement given below correctly describes the magnetic field near a long, straight current carrying conductor? Correct option is D d. The magnetic lines of force are in concentric circles with the wire as the center, in a plane perpendicular to the co... 1
- In practice the unit kWh is used for the measurement of electrical energy, rather than joule. Electrical energy = Electrical power × time. For practical applications, devices consuming high electrical power are used over a period of t... 1
- For electric power transmission, copper or aluminium wire is used. Copper or aluminum are metals which have free electrons so they are good conductors of electricity. They have a low value of resistivity and... 1
- In the electric equipment producing heat e.g. iron, electric heater, boiler, toaster etc. an alloy such as Nichrome is used, not pure metals In the electric equipment producing heat, such as iron, electric heater, boiler, toaster etc., an alloy such as Nichrome is used, not pure m... 1
- a. Tungsten metal is used to make a solenoid type coil in an electric bulb. Tungsten metal has high resistance and high melting point (nearly 3422⁰C) Because of current it gets heated at high temperature and emits li... 1
- 6. How does the short circuit form? What is its effect? The household electrical connections mainly consist of live, neutral and earth wires. The potential difference between live and neutral wire... 1
- 5. Which device is used to produce electricity? Describe with a neat diagram. a. Electric motor b. Galvanometer c. Electric Generator (DC) d. Voltmeter Electric Generator is used to Produce Electricity According to Fleming’s right hand rule, electric current is produced in the branches AB an... 2
- 4. Explain the difference : AC generator and DC generator. AC generator DC generator i. It produces alternating current. It produces direct current. ii. It has two simple ring-type commutators. It ha... 1
- Electromagnetic induction means- Correct option is C c. Generation of a current in a coil due to relative motion between the coil and the magnet 1
- An electric iron of 1100 W is operated for 2 hrs daily. What will be the electrical consumption expenses for that in the month of April? Video Solution : https://youtu.be/N6KYVnGWloU Text solution 3
- Who will spend more electrical energy? 500 W TV Set in 30 mins, or 600 W heater in 20 mins? hope it helped 2
- Two tungsten bulbs of wattage 100 W and 60 W power work on 220 V potential difference. If they are connected in parallel, how much current will flow Correct answer is 0.72 Ampere 1
- Heat energy is being produced in a resistance in a circuit at the rate of 100 W. The current of 3 A is flowing in the circuit. What must be the value of Correct answer is 11 ohm 1
- 4. Study the following graph and analyse in short. (i) This is a compound bar graph showing the contribution of primary, secondary and tertiary sectors to the national income of India and Bra... 1
- There is mixed economy in Brazil and India. In a mixed economy there is a co-existence of public sector and private sector. In Brazil, sectors like health, banking, telecommunications,... 1
- Per capita land availability is more in Brazil as compared to India. India occupies 2.4% land area of the world and supports 17.5% of the world’s total population. Brazil occupies 5.6% of land area of the worl... 1
- What are the similarities and differences in the fishing activities in Brazil and India. Similarities: In Brazil and India fishing activity is developed near the coastal areas. In both the countries, marine fishing is well- devel... 1
- Why has mining not developed in the western part of Brazil? Most of the western part of Brazil is covered by the thick dense equatorial rainforests of the Amazon Basin. Inaccessibility, poor transport... 1
- C) Why do human settlements grow in specific locations only? Human settlements grow in specific locations only because it depends on the few major factors like -Climatic factors, availability of water,... 1
- b) Diffrentiate between the human settlements in Ganga river basin and The Amazon river basin. Ganga river basin is populated with high rate of human settlement than the Amazon river basin. Ample supply of water, developed agricultural... 1