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Maharashtra SSC (Class 10) Environmental & Disaster Management — practice questions — page 3

Explore 96 free Environmental & Disaster Management questions in Maharashtra SSC (Class 10) Science. Open each question or exercise to read its content, reference answers and available explanation.

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Environmental & Disaster Management questions and exercises with answers

Showing questions 61–90 of 96.

Solar photovoltaic cells are commonly made from a special material that belongs to which class of materials?Read the answer and worked solution →A 1 cm² silicon solar cell gives about 30 mA of current. Approximately what current will a 100 cm² silicon solar cell of the same type produce?Read the answer and worked solution →A good solar cell has an efficiency of about 15%. If a solar panel receives 100 watt of power from solar radiation, what is its electrical power output?Read the answer and worked solution →Which of the following is correctly described as a green (environment-friendly) energy source in the chapter?Read the answer and worked solution →Wind turbines are most suitably installed on sea shores chiefly because such locations usually have:Read the answer and worked solution →According to the chapter's data, which energy source supplies the largest share of electrical power generation in India?Read the answer and worked solution →Which trait is listed as supporting good social health?Read the answer and worked solution →According to the chapter, gender inequality within families chiefly leads adolescent girls to experience what?Read the answer and worked solution →Why do adolescents often begin trying substances like tobacco, gutkha or alcohol?Read the answer and worked solution →Alcoholism is stated to most directly reduce the efficiency of which two organs?Read the answer and worked solution →People who continuously use computers and the internet tend to become solitary and may develop which problems?Read the answer and worked solution →The risky habit of taking selfies in dangerous places, sometimes ending in death, is given which name in the chapter?Read the answer and worked solution →Obtaining confidential information of government or companies using computer programs and misusing it is termed:Read the answer and worked solution →Illegally selling or misusing another person's software, photos, videos or music taken from the internet is called:Read the answer and worked solution →Which law is mentioned as having been enacted to deal with cyber crimes in India?Read the answer and worked solution →A person convicted of cyber crime under the IT Act 2000 can face up to how much imprisonment?Read the answer and worked solution →Which state is cited as the first to start a separate cyber crime unit and a leader in controlling cyber crimes?Read the answer and worked solution →Members of a 'laughter club' meeting in morning gardens are mainly trying to achieve what?Read the answer and worked solution →According to the chapter, meditation chiefly helps a student by improving which ability?Read the answer and worked solution →The Salaam Mumbai Foundation is described as working since 2002 mainly to make society free from what?Read the answer and worked solution →In the United Nations definition of a disaster, two key features are emphasised. Which pair of words captures them?Read the answer and worked solution →Which of the following is classified as a man-made disaster rather than a natural one?Read the answer and worked solution →An earthquake, a tsunami and a landslide are grouped together under one type of natural disaster. Which type is it?Read the answer and worked solution →Cholera, malaria, hepatitis and plague are listed as examples under which disaster category?Read the answer and worked solution →During which phase of a disaster can the maximum number of lives be saved through quick action?Read the answer and worked solution →Clearing of debris, restoring water supply and rehabilitating victims are activities that mainly belong to which phase?Read the answer and worked solution →At the district level, who is primarily responsible for disaster management and for implementing rehabilitation schemes?Read the answer and worked solution →In Maharashtra, the National Disaster Response Force carries out its action mainly through which body?Read the answer and worked solution →How many divisions of the National Disaster Response Force are working in the country, with their headquarters in Delhi?Read the answer and worked solution →A practice in which an apparent situation of disaster is created to check the reaction time and preparedness of trained personnel is called:Read the answer and worked solution →

Worked practice questions

Solar photovoltaic cells are commonly made from a special material that belongs to which class of materials?

  1. Insulator, such as rubber
  2. Superconductor, such as lead
  3. Semiconductor, such as silicon
  4. Alloy, such as common brass
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Correct answer: C. Semiconductor, such as silicon

1. Photovoltaic cells convert sunlight to electricity directly. 2. They are made of a special material called a semiconductor. 3. The example given is silicon. 4. An insulator like rubber (option A) does not conduct, so it cannot make a cell, ruling it out. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 5 "Towards Green Energy", p.65_

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A 1 cm² silicon solar cell gives about 30 mA of current. Approximately what current will a 100 cm² silicon solar cell of the same type produce?

  1. About 30 mA
  2. About 3 A
  3. About 0.5 A
  4. About 300 A
Show answer and solution

Correct answer: B. About 3 A

1. Current from a solar cell scales with its area. 2. Current = 30 mA/cm² × 100 cm² = 3000 mA. 3. Convert: 3000 mA = 3 A. 4. Keeping 30 mA (option A) ignores the area increase, a trap. 5. 300 A (option D) misplaces the decimal by a factor of 100, so it is wrong. 6. So the 100 cm² cell gives about 3 A. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 5 "Towards Green Energy", p.65_

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A good solar cell has an efficiency of about 15%. If a solar panel receives 100 watt of power from solar radiation, what is its electrical power output?

  1. 85 watt
  2. 100 watt
  3. 15 watt
  4. 1.5 watt
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Correct answer: C. 15 watt

1. Efficiency 15% means output is 15% of the input power. 2. Output = 15% of 100 W = 0.15 × 100 = 15 W. 3. 85 W (option A) is the wasted part, not the output, a trap. 4. 100 W (option B) ignores losses, so it is wrong. 5. 1.5 W (option D) misplaces the decimal, so it is wrong. 6. So the electrical output is 15 watt. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 5 "Towards Green Energy", p.66_

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