Physics (General Science) : All SSC Exams Previous Years Questions Papers Solved Part 4

Q.1:- A drop of liquid assumes spherical shape because ?

1. Intermolecular forces are strong in liquids
2. A sphere has the least surface area for a given volume
3. A sphere has the largest surface area for a given volume
4. Inter molecular forces are weak in liquids

Q.2:- A light year is a unit of ?

1. Time
2. Distance
3. Speed of light
4. Intensity of light

Q.3:- The oil in the wick of an oil lamp rises up due to ?

1. Capillary action
2. Low viscosity of oil
3. Gravitational force
4. Pressure difference

Q.4:- A star appears twinkling in the sky because of ?

1. Scattering of light by atmosphere
2. Reflection of light by atmosphere
3. Refraction of light by atmosphere
4. Diffraction of light by atmosphere

Q.5:- When hot liquid is poured into a thick glass tumbler, it cracks because glass ?

1. Is a bad conductor of heat so only inner surface expands
2. Has high temperature coefficient of expansion
3. Has a very low specific heat
4. Has low temperature coefficient of expansion

Q.6:- When two ice cubes are pressed together, they join to form one cube. Which one of the following helps to hold them together ?

1. Hydrogen Bond Formation
2. Vander Waals Forces
3. Covalent Attraction
4. Dipole Interaction

Q.7:- Electrostatic precipitator is used to control ?

1. Chemical Pollutants
2. Radio Active Pollutants
3. Water Pollutants
4. Air Pollutants

Q.8:- Persons suffering from Myopia are advised to use ?

1. Convex Lens
2. Concave Lens
3. Plano Convex Lens
4. Plano Concave Lens

Q.9:- Indicate the false statement about the resistance of a wire ?

1. It depends on material of wire
2. It is directly proportional to the length of wire
3. It is directly proportional to the area of cross section of wire
4. Resistance of metallic wire increases with increase in temperature

Q.10:- Solar cells work on the principle of ?

1. Photovoltaic effect
2. Photoelectric effect
3. Photoconductive effect
4. Photosynthesis

Q.11:- Pressure cooker cooks faster because ?

1. Boiling point decreases with rise of pressure
2. It cooks the food at low pressure
3. Higher temperature is attained for cooking
4. The material of the cooker is a good conductor

Q.12:- The characteristics invalid for heat radiation is that it travels ?

1. In a straight line
2. In all directions
3. With the speed of light
4. Heating the medium through which it passes

Q.13:- The oil in the wick of lamp rises due to ?

1. Pressure difference
2. Phenomenon of capillarity
3. Low viscosity of oil
4. Force of cohesion

Q.14:- ‘Farad’ is the unit of ?

1. Capacitance
2. Inductance
3. Resistance
4. Conductance

Q.15:- The dynamo converts ?

1. Mechanical energy into electrical energy
2. Electrical energy into mechanical energy
3. Mechanical energy into magnetic energy
4. Magnetic energy into mechanical energy

Q.16:- The method of magnetisation is ?

1. Hammering a magnet
2. Heating a magnet
3. Passing direct current through it
4. Passing alternating current through it

Q.17:- A NOT gate can be implemented by ?

1. A single diode
2. Two diodes
3. A single resistor
4. A single transistor

Q.18:- It is easier for a man to swim in sea water, than in river water because ?

1. The density of sea water is lesser than the density of river water
2. The density of sea water is more than the density of river water
3. The sea is deeper than the river
4. The sea is wider than the river

Q.19:- A radioactive substance does not undergo any change (in mass or charge) during ?

1. Gamma emission
2. Oxidation
3. Alpha Emission
4. Beta Emission

Q.19:- The type of mirror used in automobiles to see the traffic on the rear side is ?

1. Concave
2. Plano-Convex
3. Plane
4. Convex

Q.20:- When a body falls from an aeroplane, there is increase in its ?

1. Kinetic Energy
2. Mass
3. Acceleration
4. Potential Energy

Q.21:- Fiber optics cable used in communication, works on the principle of ?

1. Regulator reflection of light
2. Diffuse reflection of light
3. Refraction of light
4. Total internal reflection of light

Q.22:- A wire carrying current is ?

1. Positively charged
2. Negatively charged
3. Neutral
4. Charged with a type of depending upon current strength

Q.23:- A barometer is kept inside a bell jar. Air is slowly pumped out of the jar ?

1. The mercury level starts rising
2. The mercury level starts falling
3. The mercury level does not change
4. The bell jar breaks up

Q.24:- A small drop of oil spreads over water because ?

1. Oil has a higher surface tension
2. Water has a higher surface tension
3. Oil has a higher viscosity
4. Water has a higher viscosity

Q.25:- Green House Effect is the heating up of the Earth’s atmosphere which is due to ?

1. The Ultraviolet Rays
2. Gama Rays
3. The Infrared Rays
4. X-Rays