Channels Comparison Questions and Answers PDF Download eBook - 54

MCQ: Frequency of sky waves is

1. less than 3 MHz
2. more than 3 MHz
3. less than 2 MHz
4. exactly 2 MHz

MCQ: Electrons show diffraction effects because their de Broglie wavelength is similar to

1. spacing between atomic layers
2. no. of atomic layers
3. nature of atomic layers
4. positioning of atomic layers

MCQ: Wavelength of x-rays is in range

1. 10^-8 to 10^-13 m
2. 10^-7 to 10^-14 m
3. 10^-10 to 10^-15 m
4. 10² to 10⁹ m

MCQ: In a springy collision, if the fast moving trolley collides with a slow one, then the fast one will bounce back at speed of

1. slow one
2. less than slow one
3. more than slow one
4. with the same speed as before

MCQ: Number of degree a complete circle represents is

1. 90°
2. 180°
3. 270°
4. 360°