Exams › NEET › Physics

A hot liquid is kept in a big room. The logarithm of the numerical value of the temperature difference between the liquid and the room is plotted against time. The plot will be very nearly

1. a straight line
2. a circular arc
3. a parabola
4. an ellipse.

Correct answer: a straight line

Solution

By Newton’s law of cooling, the temperature difference decays exponentially with time. The logarithm of an exponential function is linear in time, so the plot is very nearly a straight line.

Related NEET Physics questions

• Water is poured into a pan and heated over a flame. After some time, the hot water begins rising to the top. Which type of heat transfer is involved in this?
• Which of the following statement regarding transformer is incorrect?
• Electric current flows through:
• A particle of mass \( m \) is made to move with uniform speed \( v \) along the perimeter of a regular hexagon. The magnitude of impulse applied at each corner is:
• According to Stoke's law, the viscous drag force, on an oil drop is proportional to:
• was the first to discover that lightning is electric discharge.

⚔️ Practice NEET Physics free + battle 1v1 →