Physics (General Science) : All SSC Exams Previous Years Questions Papers Solved Part 11

Q.1:- Water cannot be used to extinguish fire caused by electric current, because ?

1. It may cause electrocution
2. It may cause hydrolysis
3. It may cause electrolysis
4. It may spoil the wiring

Q.2:- Stars appear twinkling because of _______  of light.

1. Reflection
2. Scattering
3. Emission
4. Absorption

Q.3:- It is dangerous to observe Solar eclipse with naked eyes because ?

1. Infrared radiations from sun burn our retina
2. Ultraviolet radiations from sun burn our retina
3. All radiations from sun initiate chemical reactions in eyes
4. Cosmic rays reach eyes more during the eclipse

Q.4:- A copper disc has a hole. If the disc is heated, the size of the hole ?

1. Increases
2. Decreases
3. No Change
4. First increases and then decreases

Q.5:- In a railway track, two rails are joined end to end with a gap in between them because ?

1. Steel can be saved
2. Accidents due to contraction in winter can be avoided
3. Air gaps are necessary for bearing the weight of running train
4. Accidents due to expansion in summer can be avoided

Q.6:- Optical fibres are based on the phenomenon of ?

1. Interference
2. Dispersion
3. Diffraction
4. Total Internal Reflection

Q.7:- The atmospheric air is held to the Earth by ?

1. Gravity
2. Winds
3. Clouds
4. Rotation of the Earth

Q.8:- Vehicle tyres are inflated properly ?

1. To ensure smooth running
2. To allow the vehicle to take more load
3. To avoid skidding and to minimise friction
4. To go fast and save fuel

Q.9:- Name the process of production of energy in the Sun ?

1. Nuclear fission
2. Radioactivity
3. Nuclear fusion
4. Ionization

Q.10:- One can distinguish a telescope from a microscope by observing ?

1. Length
2. Colour
3. Size of the lens
4. Length and size of the lens

Q.11:- Gamma rays have greatest similarity with ?

1. Alpha rays
2. Beta rays
3. X-rays
4. V. rays

Q.12:- ‘Shock-Absobers’ are usually made of steel as it ?

1. Is not brittle
2. Has lower elasticity
3. Has higher elasticity
4. Has no ductile property

Q.13:- The time period of a pendulum when taken to the Moon would ?

1. Remain the same
2. Decrease
3. Become zero
4. Increase

Q.14:- In a nuclear reactor, one of the following is used as a fuel ?

1. Coal
2. Uranium
3. Radium
4. Diesel

Q.15:- The density of the liquid when heated ?

1. Decreases
2. Increases
3. Does not change
4. May increase or decrease

Q.16:- In MRI machine, which one of the following is used ?

1. Sound wave
2. X-ray
3. Ultra sound wave
4. Magnetic wave

Q.17:- Bolometer is used to measure ?

1. Frequency
2. Temperature
3. Velocity
4. Wavelength

Q.18:- Spectacles used for viewing 3D films have ?

1. Bifocal Lens
2. Convex lens
3. Concave lens
4. Polaroids

Q.19:- Which layer of the Earth’s atmosphere reflect back the radio waves to the Earth’s surface ?

1. Ionosphere
2. Stratosphere
3. Mesosphere
4. Exosphere

Q.20:- The process involved in making soap is ?

1. Saponification
2. Hydrolysis
3. Condensation
4. Polymerisation

Q.21:- The cause for the Tsunami, as deduced by the seismologists, is ?

1. Gravitational pull of the moon
2. Low pressure trough in the ocean
3. Deformation of sea floor and vertical displacement of water
4. Sudden change in the monsoon wind

Q.22:- A person is hurt on kicking a stone due to ?

1. Inertia
2. Velocity
3. Reaction
4. Momentum

Q.23:- The hydraulic brakes used in automobiles is a direct application of ?

1. Archimedes’ principle
2. Toricellian law
3. Bernoulli’s theorem
4. Pascal’s law

Q.24:- A multimeter is used to measure ?

1. Current
2. Voltage
3. Resistance
4. All of the above

Q.25:- ‘Short-Sight’ in human eye can be corrected by using proper ?

1. Convex lens
2. Concave lens
3. Cylindrical lens
4. Bifocal lens