MCQ
Which of the following is electromagnetic wave ?
- A$\alpha$-rays
- B$\beta^{+}$-decay
- C$\beta^{-}$-rays
- ✓$\gamma$-rays
✓
Answer
Correct option: D.
$\gamma$-rays
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
Which one of these is non-divisible(a) Nucleus(b) Photon(c) Proton(d) Atom
A unitless quantity:
- Never has a non-zero dimension.
- Always has a non-zero dimension.
- May have a non-zero dimension.
- Does not exist.
In an endothermic reaction the binding energies of reactants and products are $e_{1}, e_2$ respectively, then:
→Light passes successively through two polarimeters tubes each of length $0.29 m .$ The first tube contains dextro rotatory solution of concentration $60 \ \mathrm{kgm}^{-3}$ and specific rotation $0.01 \ \mathrm{rad} \mathrm{m}^2 \mathrm{~kg}^{-1}$. The second tube contains laevo rotatory solution of concentration $30 \mathrm{~kg} / \mathrm{m}^3$ and specific rotation $0.02 \ \mathrm{rad} \mathrm{m}^2 \mathrm{~kg}^{-1}$. The net rotation produced is
→The energy band gap is maximum in:
A nuclear reaction with positive Q value is:
Why is the Wheatstone bridge better than the other methods of measuring resistances?
Assertion : All the radioactive elements are ultimately converted in lead.
Reason : All the elements above lead are unstable. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
Reason : All the elements above lead are unstable. (a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
In the $AC$ network shown in figure, the rms current flowing through the inductor and capacitor are $0.6A$ and $0.8A$ respectively. Then the current coming out of the source is
→A susceptibility of a certain magnetic material is 400. What is the class of the magnetic material?