Newton's Law of Cooling - MCQ - Basic Level

Physics is an important subject in preparation for various Competitive exams. To keep a track of your preparation we have designed a small quiz of Basic Level Questions on Newton's Law of Cooling. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. According to Newton's law of cooling, the rate of cooling of a body is proportional to (Î”Î¸n) , where Î¸n is the difference of the temperature of the body and the surroundings and n is equal to

•  One
•  Two
•  Three
•  Four

Q2. Newton's law of cooling is used in laboratory for the determination of the

•  Specific heat of the gases
•  The latent heat of gases
•  Specific heat of liquids
•  Latent heat of liquids

Q3. Liquid is filled in a vessel which is kept in a room with temperature 20°C. When the temperature of the liquid is 80°C, then it loses heat at the rate of 60 cal/sec. What will be the rate of loss of heat when the temperature of the liquid is 40oC

•  180 cal/ sec
•  40 cal/ sec
•  30 cal/ sec
•  20 cal/ sec

Q4. A bucket full of hot water is placed in a room. Water takes t1 seconds to cool from 90°C to 80°C, t2 seconds to cool from 80°C to 70°C and t3 seconds to cool from 70°C to 60°C then

•  t3 > t2 > t1
•  t1 = t2 = t3
•  t1 > t2 > t3
•  t1 < t2 < t3

Q5. A calorimeter of negligible water equivalent contains 430 gm of water and it cools at the rate of 0.24°C per minute in the surroundings at 30°C. If at any moment the temperature of water is 34°C then at what rate the heat should be supplied to it to keep its temperature constant

•  0.24 Cal/minute
•  100 Cal/minute
•  103.2 Cal/minute
•  None of the above

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