Question
A device used to measure very high temperature is
✓
Answer
(a)Pyrometer is used to measure very high temperature.
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
Assertion $(A):$ A charge moving in a circular orbit can produce electromagnetic wave.
→Reason $(R):$ The source of electromagnetic wave should be in accelerated motion.
A police jeep is chasing with, velocity of $45\, km/h$ a thief in another jeep moving with velocity $153\, km/h$. Police fires a bullet with muzzle velocity of $180 \,m/s$. The velocity it will strike the car of the thief is........$m/s$
→A capacitor with air as the dielectric is charged to a potential of $100\;volts$. If the space between the plates is now filled with a dielectric of dielectric constant $10$, the potential difference between the plates will be......$volts$
→In a hypothetical system a particle of mass $m$ and charge $-3\,q$ is moving around a very heavy particle having cahrge $q$. Assuming Bohr’s model to be true to this system, the orbital velocity of mass $m$ when it is nearest to heavy particle is
→One end of a taut string of length $3 \ m$ along the $x$-axis is fixed at $x=0$. The speed of the waves in the string is $100 \ m / s$. The other end of the string is vibrating in the $y$-direction so that stationary waves are set up in the string. The possible waveform$(s)$ of these stationary waves is (are)
→$(A)$ $y(t)=A \sin \frac{\pi x}{6} \cos \frac{50 \pi t}{3}$
$(B)$ $y(t)=A \sin \frac{\pi x}{3} \cos \frac{100 \pi t}{3}$
$(C)$ $y(t)=A \sin \frac{5 \pi x}{6} \cos \frac{250 \pi t}{3}$
$(D)$ $y(t)=A \sin \frac{5 \pi x}{2} \cos 250 \pi t$
Consider a situation in which reverse biased current of a particular $P-N$ junction increases when it is exposed to a light of wavelength $\le 621\, {nm}$. During this process, enhancement in carrier concentration takes place due to generation of hole-electron pairs. The value of band gap is nearly. (In ${eV}$)
→Three different projectiles, each with the same mass, are fired with speed $v$ at a wall. In case $A,$ the projectile bounces straight back with speed $v.$ In case $B$, the projectile sticks to the wall. In case $C$, the projectile crashes through the wall and emerges with half its original speed. These three cases are shown here.
→Place the impulse exerted by the wall on the projectile in each of these three cases in the correct order.
$P$ and $R$ respectively are
→If Gravitational constant is decreasing in time, what will remain unchanged in case of a satellite orbiting around earth
If a Carnot engine works between $127^{\circ} C$ and $527^{\circ} C$, then its efficiency is ...... $\%$
→