A. λ-rays
B. Positive rays
C. Cathode rays
D. More than sound waves
Related Mcqs:
- The speed of stationary waves in a stretched string are independent of___________________?
A. Number of loops
B. Tension in the string
C. Point where string is plucked
D. both A and C - The direction of propagation of an electromagnetic waves is________________?
A. Perpendicular to electric field
B. Perpendicular to both electric and magnetic field
C. Perpendicular to magnetic field
D. Parallel to electric and magnetic field - Electromagnetic waves transport___________________?
A. Energy
B. Momentum
C. Mass
D. Heat - Electromagnetic waves emitted from antenna are________________?
A. Stationary
B. Longitudinal
C. Transverse
D. All the above - X-rays are electromagnetic waves like________________?
A. Light waves
B. Heat waves
C. Microwaves
D. γ-rays - Sound waves do not travel in vacuum because ___________________?
A. they are transverse waves
B. they are stationary waves
C. they require material medium for propagation
D. they do not have enough energy - A transmitting station emits radio waves of wavelength λ at power P. If h is Planck’s constant & c the speed of light what is the rate of emission of photons ?
A. λ
B. Speed of sound
C. Speed of lightB.
D. h - An electromagnetic wave consists of _____________________?
A. Electric and magnetic fields moving parallel to each other
B. Magnetic field moving with velocity of light in space
C. Electric field moving with velocity of light
D. Electric and magnetic fields moving perpendicular to each other - Value of permeability of free space in SI units is___________________?
A. 4πx10-9 WbA-1m-1
B. 4πx10-7 WbA-1m-1
C. 4πx10-10 WbA-1m-1
D. 4πx10-8 WbA-1m-1 - Field particle of Electromagnetic interaction is _________?
A. Photon
B. Meson
C. Vector Boson
D. GravitonSubmitted by: Sadi Ahmed
