MCQ
A quantity of heat required to change the unit mass of a solid substance, from solid state to liquid state, while the temperature remains constant, is known as
- ALatent heat
- BSublimation
- CHoar frost
- ✓Latent heat of fusion
✓
Answer
Correct option: D.
Latent heat of fusion
(d)
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A cell of e.m.f. $1.5 \mathrm{~V}$ having a finite internal resistance is connected to a load resistance of $2 \Omega$. For maximum power transfer the internal resistance of the cell should be
→A body floats in a liquid contained in a beaker. If the whole system as shown in figure falls freely under gravity, then the upthrust on the body due to liquid is
A simple pendulum has time period $T$. The point of suspension is now moved upward according to equation $y=k t^2$ where $k=1 m / sec ^2$. If new time period is $T$ then ratio $\frac{T_1^2}{T_2^2}$ will be
→A varying current in a coil changes from $10 \mathrm{amp}$ to zero in $0.5 \mathrm{sec}$. If average EMF is induced in the coil is $220$ volts, the self inductance of coil is
→A simple pendulum with bob of mass $m$ and conducting wire of length $L$ swings under gravity through an angle $2 \theta$. The earth's magnetic field component in the direction perpendicular to swing is B. Maximum potential difference induced across the pendulum is
→The temperature of a piece of iron is $27^{\circ} \mathrm{C}$ and it is radiating energy at the rate of $Q \mathrm{kWm}^{-2}$. If its temperature is raised to $151^{\circ} \mathrm{C}$, the rate of radiation of energy will become approximately
→Which of the following statements is correct for any thermodynamic system
A spring of force constant $800 \mathrm{~N} / \mathrm{m}$ has an extension of $5 \mathrm{~cm}$. The work done in extending it from $5 \mathrm{~cm}$ to $15 \mathrm{~cm}$ is
→A load $W$ produces an extension of $1 mm$ in a thread of radius $r$ : Now if the load is made $4 W$ and radius is made $2 r$ all other things remaining same, the extension will become
→The correct curve between voltage gain $\left(A_v\right)$ and load resistance $\left(R_L\right)$ is
→