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In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie?
A
Visible
B
Infrared
C
Ultraviolet
D
X-ray
Correct Answer:
Ultraviolet
In which region of electromagnetic spectrum does the Lyman series of hydrogen atom lie ?
A
Visible
B
Infrared
C
Ultraviolet
D
X-ray
Is the following statement true about the Lyman spectral series? Statement Lyman series lies in the ultraviolet region
A
Statement is true
B
Statement is false
If the wavelength of the first line of the Balmer series in the hydrogen spectrum is $$\lambda $$, then the wavelength of the first line of the Lyman series is
A
$$\frac{{27}}{5}\lambda $$
B
$$\frac{5}{{27}}\lambda $$
C
$$\frac{{32}}{{27}}\lambda $$
D
$$\frac{{27}}{{32}}\lambda $$
Consider a conducting loop of radius a and total loop resistance R placed in a region with a magnetic field B thereby enclosing a flux $${\phi _0}$$ . The loop is connected to an electronic circuit as shown, the capacitor being initially uncharged.
If the loop is pulled out of the region of the magnetic field at a constant speed u, the final output voltage V
out
is independent of
A
$${\phi _0}$$
B
u
C
R
D
C
The binding energy of an electron to a proton (i.e., hydrogen atom) is 13.6 eV. The loss of mass in the formation of one atom of hydrogen is _____________
A
2.42 X 10-35 Kg
B
3.34 X 10-35 Kg
C
4.58 X 10-35 Kg
D
5.19 X 10-35 Kg
A transition has a wavenumber of 2000 cm-1. In what part of the electromagnetic spectrum does this lie?
A
Radiowave
B
Electrostatic
C
Magnetic
D
Infrared
Absorption has a wavelength of 495 nm. In what part of the electromagnetic spectrum does this lie?
A
IR waves
B
Magnetic waves
C
Electrostatic
D
Ultraviolet-visible
The figure shows a constant current source charging a capacitor that is initially uncharged.
If the switch is closed at t = 0, which of the following plots depicts correctly the output voltage of the circuit as a function of time?
A
<img src="/images/option-image/engineering-physics/electromagnetic-theory/1689572836-46-1.png" title="Electromagnetic Theory mcq question image" alt="Electromagnetic Theory mcq question image">
B
<img src="/images/option-image/engineering-physics/electromagnetic-theory/1689572849-46-2.png" title="Electromagnetic Theory mcq question image" alt="Electromagnetic Theory mcq question image">
C
<img src="/images/option-image/engineering-physics/electromagnetic-theory/1689572860-46-3.png" title="Electromagnetic Theory mcq question image" alt="Electromagnetic Theory mcq question image">
D
<img src="/images/option-image/engineering-physics/electromagnetic-theory/1689572889-46-4.png" title="Electromagnetic Theory mcq question image" alt="Electromagnetic Theory mcq question image">
Consider a set of two stationary point charges q
1
and q
2
as shown in the figure. Which of the following statements is correct?
A
The electric field at P is independent of q<sub>2</sub>
B
The electric flux crossing the closed surface S is independent of q<sub>2</sub>
C
The line integral of the electric field $$\overrightarrow {\bf{E}} $$ over the closed contour C depends on q<sub>1</sub> and q<sub>2</sub>
D
$$\overrightarrow \nabla .\overrightarrow {\bf{E}} = 0$$ everywhere
A rod of length L with uniform charge density $$\lambda $$ per unit length is in the XY-plane and rotating about Z-axis passing through one of its edge with an angularvelocity $$\overrightarrow \omega $$ as shown in the figure below. $$\left( {{\bf{\hat r}},\,\hat \phi ,\,{\bf{\hat z}}} \right)$$ refer to the unit vectors at Q, $$\overrightarrow {\bf{A}} $$ is the vector potential at a distance d from the origin O along Z-axis for d ≪ L and $$\overrightarrow {\bf{J}} $$ is the current density due to the motion of the rod. Which one of the following statements is correct?
A
$$\overrightarrow {\bf{J}} {\text{ along }}{\bf{\hat r}};\overrightarrow {\bf{A}} {\text{ along }}{\bf{\hat z}};\left| {\overrightarrow {\bf{A}} } \right| \propto \frac{1}{d}$$
B
$$\overrightarrow {\bf{J}} {\text{ along }}\hat \phi ;\overrightarrow {\bf{A}} {\text{ along }}\hat \phi ;\left| {\overrightarrow {\bf{A}} } \right| \propto \frac{1}{{{d^2}}}$$
C
$$\overrightarrow {\bf{J}} {\text{ along }}{\bf{\hat r}};\overrightarrow {\bf{A}} {\text{ along }}{\bf{\hat z}};\left| {\overrightarrow {\bf{A}} } \right| \propto \frac{1}{{{d^2}}}$$
D
$$\overrightarrow {\bf{J}} {\text{ along }}\hat \phi ;\overrightarrow {\bf{A}} {\text{ along }}\hat \phi ;\left| {\overrightarrow {\bf{A}} } \right| \propto \frac{1}{d}$$