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Physical Quantities and Measurement Test - 1

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Physical Quantities and Measurement Test - 1
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  • Question 1
    1 / -0

    Use the following information to answer the next question.

    A ___I___thermometer has a temperature range of ___II___.

    The information in which alternative completes the given statement?

    Solution

    A clinical thermometer is used to measure the temperature of the human body. Since the average body temperature is 37°C, the temperature of the human body does not go above 42°C or below 35°C. Hence, a clinical thermometer has a temperature range of 35 − 42°C.

  • Question 2
    1 / -0

    How many minutes are there in a solar day?

    Solution

    One mean solar day has 24 hours, and one hour has 60 minutes.

    ∴One mean solar day has 24 × 60 = 1440 min.

  • Question 3
    1 / -0

    Beam balance is used to measure

    Solution

    Beam balance is used to measure the mass of an object by comparing it with a standard mass.

  • Question 4
    1 / -0

    Use the following information to answer the next question.

    The length of a long rod is measured first by using pace-span and then, by using foot-span of a person. For the person, the length of one pace-span is four times the length of one foot-span.

    If the length of the rod is 6 pace-spans, then what is the length of the rod in terms of foot-span?

    Solution

    It is given that the length of one pace-span is four times the length of one foot-span. Therefore, 1 pace-span = 4 foot-spans.

    Also, it is given that the length of the rod is 6 pace-spans.

    Hence, 6 pace-spans = (4×6) = 24 foot-spans.

    Hence, the length of the rod in terms of the foot-span is 24.

  • Question 5
    1 / -0

    Which of the following tools can be used to measure length?

    Solution

    A ruler is a straight strip made of plastic, glass, or wood that has markings on it. It is mainly used to measure length.

    The correct answer is A.

    Why alternative B is wrong:

    A beam balance is used to compare the masses of two objects.

    Why alternative C is wrong:

    The temperature of a body is measured by using a thermometer.

    Why alternative D is wrong:

    A magnifying glass is used to observe small objects.

  • Question 6
    1 / -0

    Which of the following is incorrect regarding temperature?

    Solution

    Temperature is degree of hotness or coldness of a body, hotter bodies have higher temperatures than the colder bodies and and it is measured by thermometer. Its SI unit is kelvin(K). SI unit of heat is joule (J).

  • Question 7
    1 / -0

    Which of the following units is not used to measure time?

    Solution

    Light year is a unit of distance. One light year is the distance traveled by light in vacuum in one year. Hence Light year is not used to measure time.

  • Question 8
    1 / -0

    Which of the following clocks/watches is used for measuring a very short interval of time?

    Solution

    Stopwatches are used in laboratories and sports meets (swimming, racing) etc. for the measurement of short time intervals. It can measure the fraction of a second. The minimum time given by it is 0.01 s.

  • Question 9
    1 / -0

    The length of an electric grid pole is 10.64 m. What is the length of the grid pole in a unit of mm?

    Solution

    Length of the electric grid pole, l = 10.64 m

    It is known that 1 m = 1000 mm

    l = 10.64 m = 10.64 × 1 m = 10.64 × 1000 mm = 10640 mm = 1.064 × 104 mm

    Therefore, the length of the grid pole is 1.064 × 104 mm.

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