Question
X-rays of 
have frequency
|
(a) 3 |
(b) 3 |
(c) |
(d) |
✓
Answer
(b) 3
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
Coulomb’s Law is valid for ______?
An AC source producing emf $\in=\in_{0}\Big[\cos\big(100\pi\text{s}^{-1}\big)\text{t}+\cos\big(500\pi\text{s}^{-1}\big)\text{t}\Big]$ is connected in series with a capacitor and a resistor. The steady-state current in the circuit is found to be $\text{i}=\text{i}_1\cos\Big[\big(100\pi\text{s}^{-1}\big)\text{t}+\phi_1\Big]+\text{i}_2\cos\Big[\big(500\pi\text{s}^{-1}\big)\text{t}+\phi_2\Big].$
→- i1 > i2
- i1 = i2
- i1 < i2
- The information is insufficient to find the relation between i1 and i2
The relation between the number of free electrons in semiconductors (n) and its temperature (T) is
|
(a) n ∝ |
(b) n ∝ T |
(c) n ∝ |
(d) n ∝ |
Which of the following is most unstable
|
(a) Electrons |
(b) Protons |
(c) Neutrons |
(d) α -particle |
Which of the following series of hydrogen spectrum is in visible range?
According to the theory of relativity, all laws of nature are the same in reference frames that::
p-n junction diode acts as:
Capacitance (in F) of a spherical conductor with radius 1m is
|
(a) 1.1 |
(b) |
(c) 9 × |
(d) |
Two charged particles traverse identical helical paths in a completely opposite sense in a uniform magnetic field.
Nuclear fission experiments show that the neutrons split the uranium nuclei into two fragments of about same size. This process is accompanied by the emission of several
|
(a) Protons and positrons |
(b) a - particles |
|
(c) Neutrons |
(d) Protons and a-particles |