Consider an oscillator which has a charged particle oscillating about its mean position with a frequency of 300 MHz. The wavelength of electromagnetic waves produced by this oscillator is _____.

(a)

1 m

(b)

10 m

(c)

100 m

(d)

1000 m

The electric and the magnetic fields, associated with an electromagnetic wave, propagating along negative X axis can be represented by _____.

(a)

\(\vec { E } ={ E }_{ 0 }\hat { i } \) and \(\vec { B } ={ B }_{ 0 }\hat { k } \)

(b)

\(\vec { E } ={ E }_{ 0 }\hat { k } \) and \(\vec { B } ={ B }_{ 0 }\hat { j } \)

(c)

\(\vec { E } ={ E }_{ 0 }\hat { i } \) and \(\vec { B } ={ B }_{ 0 }\hat { j } \)

(d)

\(\vec { E } ={ E }_{ 0 }\hat { j } \) and \(\vec { B } ={ B }_{ 0 }\hat { i } \)

In an electromagnetic wave traveling in free space the rms value of the electric field is 3 V m⁻¹. The peak value of the magnetic field is _____.

(a)

1.414 x 10^-8 T

(b)

1.0 x 10^-8 T

(c)

2.828 x 10^-8 T

(d)

2.0 x 10^-8 T

Electromagnetic waves are produced by _____________.

(a)

static charge

(b)

moving charge

(c)

an accelerating charge

(d)

chargeless particles

Which of the following electromagnetic waves has the highest frequency?

(a)

radio waves

(b)

micro waves

(c)

X- rays

(d)

૪-rays

U- V Radiation

(1)

Spectra of H₂ gas

Continuous Emission spectra

(2)

Solar spectrum

Band Emission spectra of H, gas

(3)

Spectrum of Carbon Arc

Line Absorption spectra

(4)

6 x 10^-10m to 4 x 10^-7m

Fraunhofer Lines

(5)

Incandescent solids