Question
In a thermostat two metal strips are used, which have different ............
✓
Answer
(d)
Coefficient of linear expansion should be different.
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
Velocity of water in a river is
Particles of masses $m, 2m, 3m,......nm$ $grams$ are placed on the same line at distances $l, 2l, 3l,....nl\, cm$ from a fixed point. The distance of centre of mass of the particles from the fixed point in centimetres is
→Two identical narrow slits $S_1$ and $S_2$ are illuminated by light of wavelength $\lambda$ from a point source $P$. If, as shown in the diagram above the light is then allowed to fall on a screen, and if $n$ is a positive integer, the condition for destructive interference at $Q$ is that
→A candle of diameter $ d$ is floating on a liquid in a cylindrical container of diameter $D $ $(D>>d)$ as shown in figure. If it is burning at the rate of $2$ cm/hour then the top of the candle will
→Two parallel glass plates are dipped partly in the liquid of density $'d'$ keeping them vertical. If the distance between the plates is $'x'$, surface tension for liquids is $T$ and angle of contact is $\theta $, then rise of liquid between the plates due to capillary will be
→Cooking gas containers are kept in a lorry moving with uniform speed. The temperature of the gas molecules inside will
A body is pulled along a rough horizontal surface with a velocity $6\,m/s$. If the body comes to rest after travelling $9\,m$ , then coefficient of sliding friction, is- (Take $g = 10\,m/s^2$ )
→Choose the most reasonable reaction intermediate for the following reaction.
A container of volume $1{m^3}$is divided into two equal compartments by a partition. One of these compartments contains an ideal gas at $300 K$. The other compartment is vacuum. The whole system is thermally isolated from its surroundings. The partition is removed and the gas expands to occupy the whole volume of the container. Its temperature now would be ..... $K$
→A square loop of side $1\,m$ is placed in a perpendicular magnetic field. Half of the area of the loop inside the magnetic field. A battery of $emf$ $10\, V$ and negligible internal resistance is connected in the loop. The magnetic field changes with time according to relation $B = (0.01 -2t)\, Tesla$. The resultant $emf$ in the loop will be.....$V$
→