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Q. No.Electromagnetic waves are produced by:
1. a static charge
2. a moving charge
3. an accelerating charge
4. chargeless particles
Subtopic: Generation of EM Waves |
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In a vacuum, if \(c\) represents the velocity of light, \(\mu_0\) denotes the permeability, and \(ε_0\) signifies the permittivity, we can express the relationship as:
| 1. | \(c=\dfrac{1}{\mu_0\varepsilon_0}\) | 2. | \(c=\dfrac{1}{\sqrt{\varepsilon_0\mu_0}}\) |
| 3. | \(c=\dfrac{\mu_0}{\varepsilon_0}\) | 4. | \(c=\sqrt{\dfrac{\mu_0}{\varepsilon_0}}\) |
Subtopic: Generation of EM Waves |
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Level 1: 80%+
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A charged particle oscillates about its mean equilibrium position with a frequency of \(10^9~\text{Hz}\). The electromagnetic waves produced:
a. will have frequency of \(10^9 ~\text{Hz} .\)
b. will have frequency of \(2 × 10^9~\text{Hz}.\)
c. will have a wavelength of \(0.3~\text{m}\).
d. fall in the region of radiowaves.
Choose the correct option:
1. (a), (d)
2. (a), (c), (d)
3. (b), (d)
4. (c), (d)
a. will have frequency of \(10^9 ~\text{Hz} .\)
b. will have frequency of \(2 × 10^9~\text{Hz}.\)
c. will have a wavelength of \(0.3~\text{m}\).
d. fall in the region of radiowaves.
Choose the correct option:
1. (a), (d)
2. (a), (c), (d)
3. (b), (d)
4. (c), (d)
Subtopic: Generation of EM Waves |
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Given below are two statements about a charge \(q\) moving in a circular orbit:
| Assertion (A): | A charge moving in a circular orbit can produce an electromagnetic wave. |
| Reason (R): | The source of the electromagnetic wave should be in accelerated motion. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Generation of EM Waves |
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The source of electromagnetic waves can be a charge
a. moving with a constant velocity.
b. moving in a circular orbit.
c. at rest.
d. falling in an electric field
Choose the correct option:
1. (a), (d)
2. (a), (b), (c)
3. (b), (d)
4. (c), (d)
a. moving with a constant velocity.
b. moving in a circular orbit.
c. at rest.
d. falling in an electric field
Choose the correct option:
1. (a), (d)
2. (a), (b), (c)
3. (b), (d)
4. (c), (d)
Subtopic: Generation of EM Waves |
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Level 1: 80%+
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