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On the Fahrenheit temperature scale, what are the values assigned to the ice point and the steam point, respectively?
The NCERT text specifies, 'The ice and steam point have values 32 °F and 212 °F, respectively, on the Fahrenheit temperature scale.'
Which of the following is the SI unit of temperature?
The text explicitly states, 'The SI unit of heat energy transferred is expressed in joule (J) while SI unit of temperature is Kelvin (K), and degree Celsius (°C) is a commonly used unit of temperature.'
What is the relationship between Celsius temperature ($t_C$) and Fahrenheit temperature ($t_F$)?
The summary section clearly states, 'The Celsius temperature ($t_C$) and the Fahrenheit temperature ($t_F$) are related by $t_F = (9/5)t_C + 32$'.
How is the Kelvin absolute temperature scale (T) related to the Celsius scale ($T_C$)?
The summary provides the relation: 'The Kelvin absolute temperature scale (T) has the same unit size as the Celsius scale ($T_C$), but differs in the origin: $T_C = T - 273.15$.' This means $T = T_C + 273.15$.
Which of the following best describes temperature?
The text defines temperature as 'Temperature is a relative measure, or indication of hotness or coldness.'
The term 'hot' and 'cold' are considered relative terms. What does this imply about our perception of temperature by touch?
The text states, 'Note that hot and cold are relative terms, like tall and short. We can perceive temperature by touch. However, this temperature sense is somewhat unreliable and its range is too limited to be useful for scientific purposes.'
What is the primary reason for heat transfer between a system and its surroundings when their temperatures are different?
The text explains, 'It means that when the temperature of body, ice-cold water or hot tea in this case, and its surrounding medium are different, heat transfer takes place between the system and the surrounding medium, until the body and the surrounding medium are at the same temperature.'
For a rigid body rotating about a fixed axis, which of the following statements is true regarding the angular velocity?
According to the NCERT text, 'In our discussion so far the angular velocity appears to be a scalar. In fact, it is a vector... For rotation about a fixed axis, the angular velocity vector lies along the axis of rotation...'. Therefore, option 3 is correct.
The linear velocity (v) of a particle of a rigid body rotating about a fixed axis is related to its angular velocity ($\omega$) and position vector (r) by which of the following expressions?
The NCERT text states, 'The linear velocity of the particle at P is $\mathbf{v} = \mathbf{\omega} \times \mathbf{r}$.' This vector product correctly represents the relationship between linear and angular velocity.
In the rotation of a rigid body about a fixed axis, every particle of the body moves in a circle. What is the orientation of this circle relative to the axis of rotation?
The NCERT text mentions, 'every particle of the body moves in a circle, which lies in a plane perpendicular to the axis and has its centre on the axis.' This directly answers the question.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.