Question 1

An FM radio station broadcasts 12 MHz. What is its wavelength?

Accepted Answer

2.5 x 10⁶Hz

Answer

250 MHz

Answer

2.5 x 10⁶ MHz

Answer

250 Hz

Question 2

What happen to the wavelength and energy if the frequency increases?

Accepted Answer

The wavelength decrease and energy increase.

Answer

The wavelength and energy increase.

Answer

The wavelength increases the energy decrease

Answer

The wavelength and energy both decrease.

Question 3

Find the speed of wave when frequency is 5Hz with wavelength of 20 m.

Accepted Answer

100 m/s

Answer

4 s/m

Answer

4 m/s

Answer

100 s/m

Question 4

Which is fastest among electromagnetic waves?

Accepted Answer

None of them

Answer

Gamma Ray

Answer

both Gama Ray and radio wave

Answer

Radio Wave

Question 5

What is the frequency of Radio Station if the wavelength is 50 m.

Accepted Answer

6x 10 6 Hz

Answer

6 x 10⁶KHz

Answer

6 X10⁶ MHz

Answer

60 x 10⁴ Hz

Question 6

A cancer patient needs radiation therapy with 1 x 10¹⁹ Hz. What is the wavelength of gamma ray?

Accepted Answer

5 x 10^-12 m

Answer

5 x10  -6 m

Answer

5 x 10¹²m

Answer

5x  10  6  m

Question 7

The gamma ray has frequency of 6 x ^{10^-19} Hz and wave length of 5 x 10⁶ m

Accepted Answer

10

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