150+ Physics General Knowledge Questions: Page – 4
Q061) The presence of free ___________ in a substance makes it a conductor of electricity:A) Positrons
B) Protons
C) Electrons
D) Neutrons
Answer: C
Q062) During fog we cannot see because of:
A) Reflection
B) Internal Reflection
C) Refraction
D) Scattered Light
Answer: D
Q063) ___________ determines the speed of sound in a medium:
A) Tone of the Wave
B) Time of the Wave
C) Properties of the Medium
D) Amplitude of the Wave
Answer: C
Q064) When the angle between the force and the displacement is 90, the work done is __________:
A) Neutral
B) Negative
C) Zero
D) Positive
Answer: C
Q065) ________ is the change in velocity per unit time:
A) Acceleration
B) Momentum
C) Force
D) Inertia
Answer: A
Q066) When speed of an object exceeds the velocity of sound, then it is said to be moving with ______ speed:
A) Subsonic Speed
B) Supersonic Speed
C) Ultrasonic Speed
D) None of These
Answer: B
Q067) Ultrasound is used to detect ________ in metal blocks:
A) Metal heat
B) Cracks and Flaws
C) Metal Opacity
D) Metal Heaviness
Answer: B
Q068) Water exists as _______ in its solid state:
A) Ice
B) Clouds
C) Foam
D) Steam
Answer: A
Q069) 18 Volts= ________ × 3 Ohms:
A) 6 Amperes
B) 6 Watts
C) 6 Milliamperes
D) 6 Joules
Answer: A
Q070) The velocity of a particle located at the centre of a pipeline will be:
A) Maximum
B) Minimum
C) Zero
D) None of These
Answer: A
Q071) The incident angle for a beam going through the centre of curvature of a concave mirror will be:
A) 0°
B) 60°
C) 90°
D) 180°
Answer: A
Q072) At what point does the Fahrenheit temperature double:
A) -6.7°C
B) -12°C
C) 118°C
D) 160°C
Answer: D
Q073) A convex lens has a focal length of 20cm. Its power in dioptre is:
A) 2
B) 5
C) -7
D) -9
Answer: B
Q074) Light enters eye through a transparent membrane known as __________:
A) Cornea
B) Pupil
C) Retina
D) None of These
Answer: A
Q075) If the force of 3N is applied to a 50 kg object, then what will be the velocity of the object after 4 sec:
A) 0.24 m/s
B) 0.36 m/s
C) 0.68 m/s
D) 1.03 m/s
Answer: AQ076) __________ waves are also known as heat waves:
A) X-rays
B) Gamma Rays
C) Light Waves
D) Infrared Waves
Answer: D
Q077) The English physicist James P. Joule outlined the basis of the _________:
A) Principle of Conversation
B) Phenomenon of Gravitation
C) Theory of Vibrating Receptacle
D) None of These
Answer: A
Q078) A source produces ten crests and ten troughs in 0.1 sec. What is the frequency of the wave produced:
A) 100Hz
B) 108Hz
C) 118Hz
D) 140Hz
Answer: A
Q079) Weber per second is equivalent to _________:
A) Coulomb
B) Volt
C) Ohm
D) Ampere
Answer: B
Q080) 30°C is equal to ________ Kelvin (Approximately):
A) -30
B) 130
C) -243
D) 300
Answer: C
