Maxwell's Equations
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State the Gauss law of magnetism.
A capacitor is charged with a battery and energy stored is U. After disconnecting battery another capacitor is of same capacity is connected in parallel with it. Then energy stored in each capacitor is
What is the SI unit of intensity?
An α-particle moves in a circular path of radius in the presence of a magnetic field of . The de Broglie wavelength associated with the particle will be:
- Become zero
- Increase
- Decrease
- Remain same
A signal of is transmitted in a cable. The attenuation of cable is and cable length is. The power received at receiver is . The value of is ______.
An electromagnetic wave of frequency enters a dielectric medium of relative electric permittivity from vacuum. The wavelength of this wave in that medium will be _______ .
What does the area under the Maxwell distribution curve represent?
Why the capacitor is connected in parallel?
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1360355/original_1.png)
- an anticlockwise current-pulse.
- a clockwise current-pulse.
- an anticlockwise current-pulse and then a clockwise current -pulse
- a clockwise current-pulse and then an anticlockwise current -pulse.
- 4.8×106 Hz
- 4.8×108 Hz
- 8.4×108 Hz
- 2.4×107 Hz
- 1
- 43
- 13
- 23
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1334239/original_2q.png)
- 2Nsinθ πR2ε0d
- (2N−1)sinθ πR2ε0d
- 2N(π−θ)R2ε0d
- (2N−1)(π−θ)R2ε0d
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1195677/original_6q.png)
- 3 A
- 13 A
- 23 A
- −3 A
A 200 Hz wave with amplitude 1 mm travels on a long string of linear mass density 6 g m−1 kept under a tension of 60 N. (a) Find the average power transmitted across a given point on the string. (b) Find the total energy associated with the wave in a 2.0 m long portion of the string.
Unification of electricity magnetism and optics was given by
The displacement current flows in the dielectric of a capacitor when the potential difference across its plates__________
- 53.8 kV
- 74.5 kV
- 89.2 kV
- 69.6 kV
- Charge on the capacitor
- Potential difference across the capacitor
- Energy of the capacitor
- Energy density between the plates of the capacitor.
(ii) The equation for the magnetic field as a function of x(m) and t(s) is
[1 Mark]
- →B=11×10−8 sin[π(t−xc)]^i
- →B=11×10−8 sin[π×1011(t−xc)]^i
- →B=11×10−8 sin[π×1011(t−xc)]^j
- →B=11×10−8 sin[π×1011(t−xc)]^k
The magnetic field due to current element depends upon which of the following factors:
Current flowing through it.
Distance from it.
Its length.
All of above.
(Permittivity of free space, $\varepsilon_0 = 8.85 \times 10^{–12} C^2 N^{–1} m^{–2}) \)
What are electromagnetic waves? Give examples.
- Increases
- Remains same
- Decreases
- Becomes zero
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1082286/original_34.png)
- The charge density of A and B are same
- The field inside and outside A is zero
- The field between A and B is not zero
- The field inside and outside B is zero