General Physics

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181 What is the full form of ‘AM’ regarding radio broadcasting?

A
Amplitude Movement
B
Anywhere Movement
C
Amplitude Matching
D
Amplitude Modulation

182 In severe winter, in cold countries water pipes burst because

A
water expands on freezing
B
contraction of water pipes
C
high atmospheric pressure
D
combined effect of all the above three

183 A mirage occurs because of :

A
reflection by hot ground
B
total internal reflection by layers of air
C
interference of light
D
diffraction of light

184 A soap bubble shows colours when illuminated with white light. This is due to :

A
Diffraction
B
Polarisation
C
Interference
D
Reflection

185 A photo-electric cell converts

A
mechanical energy to electric energy
B
heat energy to mechanical energy
C
light energy to chemical energy
D
light energy to electrical energy

186 Fog is an example of :

A
Gas dispersed in gas
B
Liquid dispersed in gas
C
Solid dispersed in gas
D
Solid dispersed in liquid

187 The sparkling of a diamond is due to :

A
total internal reflection of light
B
interference of light
C
polarisation of light
D
refraction of light

188 The modulus of rigidity is the ratio of :

A
longitudinal stress to longitudinal strain
B
Volume stress to volume strain
C
shearing stress to shearing strain
D
tensile stress to tensile strain

189 In sunlight a rose appears red. In green light, the same rose appears

A
red
B
black
C
green
D
yellow

190 The bats can fly in the dark because

A
they can see the objects in darkness
B
they have weak legs and are likely to be attacked by predators
C
they generate flashes of light
D
they generate ultrasonic sound waves

191 A transformer works on the principle of :

A
Self induction
B
Mutual induction
C
Generator
D
Inverter

192 When a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is :

A
below a certain minimum value irrespective of amount of water in the pail
B
above a certain minimum value irrespective of amount of water in the pail
C
above a certain minimum value depending on amount of water in the pail
D
below a certain minimum value depending on amount of water in the pail

193 The audio signals of TV are

A
Amplitude modulated
B
Frequency modulated
C
Unmodulated
D
Velocity modulated

194 When a person sitting on a swing stands up on the swing, the frequency of oscillation :

A
decreases
B
increases
C
becomes infinite
D
does not change

195 To measure the speed of an approaching car a police officer shines

A
light waves on it
B
microwaves on it
C
radio waves on it
D
ultra high frequency waves on it