Select Chapter Topics:
Q. No.Consider the following statements:
Statement I:
Charged particles which undergo acceleration or deceleration radiate their energy away.
Statement II:
Therefore, charged particles moving in circular paths in a uniform magnetic field should also radiate their energy.
1.
Statement I is true, Statement II is true and Statement I implies Statement II.
2.
Statement I is true, Statement II is true and Statement I does not imply Statement II.
3.
Statement I is true, Statement II is false.
4.
Statement I is false, Statement II is true.
Subtopic: Â Generation of EM Waves |
 54%
Level 3: 35%-60%
Hints
The speed of light depends:
| 1. | on elasticity of the medium only. |
| 2. | on inertia of the medium only. |
| 3. | on elasticity as well as inertia. |
| 4. | neither on elasticity nor on inertia. |
Subtopic: Â Properties of EM Waves |
 66%
Level 2: 60%+
Hints
A compass needle is placed in the gap of a parallel plate capacitor. The capacitor is connected to a battery through a resistance. The compass needle:
| 1. | does not deflect. |
| 2. | deflects for a very short time and then comes back to the original position. |
| 3. | deflects and remains deflected as long as the battery is connected. |
| 4. | deflects and gradually comes to the original position in a time which is large compared to the time constant. |
Subtopic: Â Displacement Current |
Level 3: 35%-60%
Hints
Displacement current goes through the gap between the plates of a capacitor when the charge of the capacitor:
| (a) | increases |
| (b) | decreases |
| (c) | does not change |
| (d) | is zero |
Choose the correct option:
1. (a), (b)
2. (b), (c)
3. only (c)
4. (a), (d)
Subtopic: Â Displacement Current |
 72%
Level 2: 60%+
Hints
The average electric field associated with the plane electromagnetic wave \(\vec E = E_0 \hat {i} \sin (wt - kz)\) is:
| 1. | \(E_0 \hat i\) | 2. | \(\dfrac {E_0} { \sqrt 2}\) \(\hat i \) |
| 3. | \(\sqrt 2E_0 \hat i\) | 4. | zero |
Subtopic: Â Properties of EM Waves |
 54%
Level 3: 35%-60%
Hints
The electric field of an electromagnetic wave is given by \(\overrightarrow E = E_0 \hat j \cos (\omega t - kx)+ E_0\hat i \sin (\omega t -kx) \).
The maximum value of the electric field in the wave is:
The maximum value of the electric field in the wave is:
| 1. | \(\dfrac {E_0} {\sqrt 2}\) | 2. | \(E_0\) |
| 3. | \(\sqrt 2 E_0\) | 4. | \(\sqrt 3 E_0\) |
Subtopic: Â Properties of EM Waves |
Level 3: 35%-60%
Hints
The maximum electric field of a plane electromagnetic wave traveling through a vacuum is \(300~\text{V/m}.\) The maximum magnetic field of this wave is:
1. \(300~\text{T}\)
2. \(10^{-6}~\text{T}\)
3. \(9 \times 10^{10}~\text{T}\)
4. \(300\sqrt {2}~\text{T}\)
1. \(300~\text{T}\)
2. \(10^{-6}~\text{T}\)
3. \(9 \times 10^{10}~\text{T}\)
4. \(300\sqrt {2}~\text{T}\)
Subtopic: Â Properties of EM Waves |
 87%
Level 1: 80%+
Hints
An electromagnetic waveform given by \(\vec{E}=E_{0} \hat{j} \sin \omega t\cos k x\) is set up in a certain region of space, where \(\vec{E}\) represents the electric field. The magnetic field associated with this waveform oscillates along the direction of:
1. \(\hat {i}\)
2. \(\hat {j}\)
3. \(\hat{k} \)
4. \(\hat{j} + \hat{k}\)
1. \(\hat {i}\)
2. \(\hat {j}\)
3. \(\hat{k} \)
4. \(\hat{j} + \hat{k}\)
Subtopic: Â Properties of EM Waves |
 74%
Level 2: 60%+
Hints
A capacitor of capacitance \(C\) is connected across an AC source of voltage \(V\), given by;
\(V=V_0 \sin \omega t\)
The displacement current between the plates of the capacitor would then be given by:
\(V=V_0 \sin \omega t\)
The displacement current between the plates of the capacitor would then be given by:
| 1. | \( I_d=\dfrac{V_0}{\omega C} \sin \omega t \) | 2. | \( I_d=V_0 \omega C \sin \omega t \) |
| 3. | \( I_d=V_0 \omega C \cos \omega t \) | 4. | \( I_d=\dfrac{V_0}{\omega C} \cos \omega t\) |
Subtopic: Â Displacement Current |
 60%
Level 2: 60%+
NEET - 2021
Hints
Links
A plane electromagnetic wave is given by its electric field: \(\vec {E}=\vec {E_0}\cos\dfrac{\omega}{c}(ct-\beta x)\)
where \(\omega\) and \(\beta\) are constants, \(t\) is the time and \(x\) represents the \(x\text-\)coordinate. \(c\) is the speed of the light in vacuum.
The value of \(\beta,\)
where \(\omega\) and \(\beta\) are constants, \(t\) is the time and \(x\) represents the \(x\text-\)coordinate. \(c\) is the speed of the light in vacuum.
The value of \(\beta,\)
| 1. | cannot be less than \(1\). |
| 2. | equals \(1\), always. |
| 3. | cannot be greater than \(1\). |
| 4. | can be any non-zero value. |
Subtopic: Â Properties of EM Waves |
Level 3: 35%-60%
Hints
Select Chapter Topics:
© 2026 GoodEd Technologies Pvt. Ltd.