A. X-ray
B. Y-ray
C. Cathode rays
D. Infra-red rays
A. Their wavelengths should be the same
B. The wavelength of electromagnetic waves will be more
C. The wavelength of ultrasonic waves will be more
D. None
A. Longitudinal wave
B. Transverse wave
C. Polarized wave
D. None
A. Interference
B. Reflection
C. Refraction
D. None
A. Increase the magnetic flux
B. Increase the output
C. Decrease the current
D. Decrease the output resistance
A. Verifying inverse square law
B. Finding the mass of a magnet
C. Comparing magnetic moments
D. Measuring dip
A. Amplifier
B. Generator
C. Loudspeaker
D. Microphone
A. A.C
B. D.C
C. Both of these
D. None
A. Alpha rays
B. Beta rays
C. Gamma rays
D. X-rays
A. Absence of water vapor in the Air
B. Clouds generate air currents and disturbances which do not promote frosty conditions
C. Clouds prevent radiation and therefore help the ground temperature remain higher
D. Moisture of air has been sucked away by the clouds.