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Physics
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Quiz 7
Mdcat-past-papers - SZABMU - Physics Quiz
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Board: SZABMU | Subject: Physics |
121. A process in which only one half of alternating current is converted into direct current is called:
Full wave rectification
Amplification
Half wave rectification
Magnification
122. Efficiency of full wave rectifier circuit is almost ------- than half wave rectifier circuit:
Four times
Same as
Sixteen times
Double
123. Which photon carries the most energy?
Blue
Violet
Red
Green
124. Which x-ray photon will have longest wavelength?
K-alpha
K-beta
K-gamma
All have equal energy
125. The half-life of Iodine-131 is:
10 days
8 days
45 days
60 days
126. The half-life of carbon is 5730 years. How much carbon will left after 22920 years?
1/32th
1/16th
1/64th
1/4th
127. He represents:
A-rays
β-rays
γ-rays
X-rays
128. The half life of Iodine-31 is:
10 days
8 days
45 days
60 days
129. The relation between the decay constant λ and the half-life T₁/₂ is:
T₁/₂ = 0.693/λ
λ = T₁/₂ / 0.693
T₁/₂ = λ / 0.693
λ = T₁/₂ × 0.693
130. 1 becquerel is equal to:
One decay per second
Two decays per second
Three decays per second
Four decays per second
131. Geiger Muller Counter's wire is maintained at:
+1000V
–1000V
+10,000V
–10,000V
132. Skin burns, loss of hair, drop in the white blood cells etc. are examples of:
Somatic effect
Genetic effect
Metabolism effect
Mutation effect
133. 3.7 × 10 disintegration/second is equal to:
1
10
100
1000
134. Radioactive decay is directly proportional to the stability of the:
Zener effect
Atmosphere
Isotopes
Half-life
135. Skin burn, loss of hair, drop in white blood cell and induction of cancer are examples of:
Zener effect
Genetic effect
Somatic effect
Biological effect
136. Skin burn, loss of hair, drop in white blood cell and induction of cancer are examples of:
Zener effect
Genetic effect
Somatic effect
Biological effect
137. Leptons are the group of particles which are:
Less massive than the lightest hadrons
More massive than the lightest hadrons
Less massive than the heaviest hadrons
More massive than the heaviest hadrons
138. A meson consists of a:
Quark and an antiquark
Only quarks
Anti-quarks
Quark and hadrons
139. Red light is used in photographic dark room because of:
More frequency, less wavelength
Less frequency, less wavelength
Less frequency, more wavelength
More frequency, more wavelength
140. Which is the correct 'ascending order' in which photons are arranged according to their energy?
Microwaves, Ultraviolet rays, Gamma rays
Gamma rays, UV rays, Microwaves
Gamma rays, Microwaves, Ultraviolet
UV rays, Gamma rays, Microwaves
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