1) When a stone is thrown in the calm water of a pond waves produced are.
A) Longitudinal waves
B) Transverse Wave
C) Both A and B
D) Wave does not Produce
Ans) C
2) Which instrument can be used to study the waveform of signal
A) Spectrometer
B) Oscilloscope
C) Sonometer
D) P-n Junction diode
Ans) B
3 What is found in frequency modulation
A) Fixed frequency
B) Fixed dimension
C) Change in frequency and dimension
D) Change in dimension only
Ans) B
4) The wave cannot be transmitted in the vacuum.
A) Light
B) Sound
C) Heat
D) Electromagnetic
Ans) B
5) The intensity of any wave is proportional to which of the following
A) Amplitude
B) Square of amplitude
C) The square root of amplitude
D) Cube of amplitude
Ans) B
6) The Reverse effect of X-ray emission is
A) Raman Effect
B) Compton Effect
C) Zeeman Effect
D) Photoelectric Effect
Ans) D
7) Which one of the following waves cannot be polarized
A) Radio
B) Ultraviolet
C) Infrared
D) Ultrasonic
Ans) D
8) Which of the following is not an electromagnetic wave
A) X-ray
B) Gamma-ray
C) Cathode Ray
D) Infrared
Ans) C
9) Which of the following has the lowest frequency
A) Visible Ray
B) Gamma Ray
C) X-Ray
D) Ultraviolet Rays
Ans) A
10) Every hot object emits
A) X-rays
B) Visible Light
C) Infrared Rays
D) Ultraviolet
Ans) C
11) Which of the following is not true about X-rays
A) Have low penetrating power
B) Travel with the speed of light
C) Can be reflected or refracted
D) Can affect photographic plates
Ans) A
12) Which of the following travels in the glass with a minimum velocity
A) Red Light
B) Violet Light
C) Green Light
D) Yellow Light
Ans) B
The speed of light in any medium is directly proportional to the wavelength of light. As violet has a minimum wavelength. So, its speed is the minimum
13) X-Rays are
A) Positively charged particles
B) Negatively charged particles
C) Neutral particles
D) Yellow Light
Ans) C
14) The greenhouse effect is the heating up of the Earth’s atmosphere which is due to
A) The Ultraviolet Rays
B) Gamma-rays
C) The infrared rays
D) X-rays
Ans) C
15) Which electromagnetic radiation is used for satellite communications.
A) Ultraviolet
B) Infrared
C) Microwave
D) Millimeter-Wave
Ans) Microwave
16) The radiation initially produced in a fluorescent tube is
A) Infrared Rays
B) Ultraviolet
C) Microwaves
D) X-rays
Ans) B
17) Ultraviolet rays can be used in water treatment as
A) Precipitator
B) Hydrolyser
C) Disinfectant
D) Flocculator
Ans) C
18) The device which is used to measure the wavelength of X-rays is
A) Cyclotron
B) Bragg’s Spectrometer
C) Mass spectrometer
D) GM counter
Ans) B
19) Who is the inventor of RADAR
A) H.N. Van Tessie
B) William K. Rontgen
C) P.T. Farnsworth
D) A.H. Taylor and Lio C. Young
Ans) D
20) Who discovered X-rays
A) Roentgen
B) Becquerel
C) Marie Curie
D) Wan Loo
Ans) A
21) In a filament type bulb, most of the electric power consumed appear as
A) Visible Light
B) Infrared light
C) Ultraviolet
D) Fluorescent Light
Ans) B
22) Which of the following is used in an MRI machine
A) Sound wave
B) X-ray
C) Ultrasonic wave
D) Magnetic wave
Ans) D
23) Coolidge tube is used to produce
A) Radio waves
B) Microwaves
C) X-ray
D) Gamma rays
Ans) C
24) Which of the following part of sunlight makes the solar cooker hot
A) Ultraviolet
B) Red Light
C) Infrared
D) Cosmic rays
Ans) C
25) The scientist who first sent electromagnetic waves to a distant place is
A) James Clerk Maxwell
B) Heinrich Hertz
C) Thomas Alva Edison
D) John Logie Baird
Ans) B
