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Q. No.An electric heater supplies heat to a system at a rate of \(100\) W. If the system performs work at a rate of \(75\) J/s, then the rate at which internal energy increases will be:
1. \(125~\text{W}\)
2. \(100~\text{W}\)
3. \(25~\text{W}\)
4. \(75~\text{W}\)
1. \(125~\text{W}\)
2. \(100~\text{W}\)
3. \(25~\text{W}\)
4. \(75~\text{W}\)
Subtopic: Â First Law of Thermodynamics |
 72%
Level 2: 60%+
NEET - 2026
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\(1~\text g\) of water of volume \(1~\text{cm}^3\) at \(100^\circ \text{C}\) is converted into steam at the same temperature under normal atmospheric pressure \(\approx 1\times10^{5}~\text{Pa}.\) The volume of steam formed equals \(1671~\text{cm}^3.\) If the specific latent heat of vaporization of water is \(2256~\text{J/g},\) the change in internal energy is:
| 1. | \(2423~\text J\) | 2. | \(2089~\text J\) |
| 3. | \(167~\text J\) | 4. | \(2256~\text J\) |
Subtopic: Â First Law of Thermodynamics |
 67%
Level 2: 60%+
NEET - 2019
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