MCQ
If a black body is heated at a high temperature, it seems to be
  • A
    Blue
  • White
  • C
    Red
  • D
    Black

Answer

Correct option: B.
White

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The small magnets each of magnetic moment $10\ A-m$ are placed end-on position $0.1 \mathrm{~m}$ apart from their centres. The force acting between them is
A truck of mass $30,000 \mathrm{~kg}$ moves up an inclined plane of slope $1$ in $100$ at a speed of $30 \mathrm{kmph}$. The power of the truck is (given $\left.g=10 \mathrm{~ms}^{-1}\right)$
The value of ' $g$ ' at a particular point is $9.8 \mathrm{~m} / \mathrm{s}^2$. Suppose the earth suddenly shrinks uniformly to half its present size without losing any mass. The value of ' $g$ ' at the same point (assuming that the distance of the point from the centre of earth does not shrink) will now be
Temperature above which a ferromagnetic substance becomes paramagnetic is called
For a thermocouple, the neutral temperature is $270^{\circ} C$ and the temperature of its cold junction is $20^{\circ} C$. If there is no deflection in the galvanometer, the temperature of the hot junction should be
The energy of electron in first excited state of $H-$atom is $-3.4 eV$ its kinetic energy is
Velocity of water in a river is
Which of the following is not an application of eddy currents
A solenoid has $2000$ turns wound over a length of $0.30$ metre. The area of its cross-section is $1.2 \times 10^{-3} \mathrm{~m}^2$. Around its central section, a coil of $300$ turns is wound. If an initial current of $2 \mathrm{~A}$ in the solenoid is reversed in $0.25 \mathrm{sec}$, then the e.m.f. induced in the coil is
Energy of an electron in $\pi$ orbit of hydrogen atom is $\left(k=\frac{1}{4 \pi \varepsilon_0}\right)$