Physics General Studies Questions for ssc upsc competitive examspage 12

166 .A liquid initially contracts when cooled to 4Â°C but on further cooling down to 0Â°C, it expands. The liquid is:

A. Alcohol

B. Water

C. Moltern iron

D. Mercury

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167 .The phenomenon of electromagnetic induction implies a production of induced

A. resistance in a coil when the magnetic field changes with time

B. current in a coil when an electric field changes with time

C. current in a coil when a magnetic field changes with time

D. voltage in a coil when a magnetic field changes with time

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168 .An artificial ecosystem is represented by-

A. Pisciculture tank

B. Agriculture land

C. Aquarium

D. Zoo

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169 .Metal tea pots have wooden handles because

A. Wood is a bad conductor of heat

B. it prevents electric shock

C. its gives beauty to the pots

D. it is hygienic

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170 .When a gas expands adiabactically

A. no energy is required for expansion

B. energy is required and it comes from the wall of the container of the gas

C. law of conservation of energy does not hold

D. none of these

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171 .In which Eco-system Grassland is included?

A. marine

B. Fresh Water

C. Terrestrial

D. Artificial

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172 .All of the organisms living in a particular area make up _____.

A. A food chain

B. A population

C. A biological community

D. A biosphere

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173 .Fuse wire should have

A. low resistance, high melting point

B. low resistance, low melting point

C. high resistance, low melting point

D. high resistance, high melting point

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174 .Which of the following property of sound is affected by change in air temperatue?

A. Wavelength

B. Amplitude

C. Frequency

D. Intensity

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175 .In the nuclear reactors, moderators are used to:

A. Slow down the neutrons

B. Generate neutrons

C. Accelerate neutrons

D. Absorb the neutrons

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176 .Dirty cloths containing grease and oil stains are cleaned by adding detergents to water. Stains are removed because detergent:

A. Reduced drastically the surface tension between water and oil

B. increases the surface tension between water and oil

C. increase the viscosity of water and oil

D. d ecreases the visocity in detergent mixed water

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177 .A fuse is used in an electric circuit to-

A. Break the circuit when excessive current flows through the circuit

B. Break the circuit when power gets off

C. Indicate if the current is flowing uninterrupted

D. Complete the circuit for flow of current

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178 .The bset conductor of heat among the following is-

A. Alcohol

B. Mercury

C. Ether

D. Water

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179 .With the rise of temperature, the speed of sound in a gas

A. Increases

B. decreases

C. remains the same

D. none of these

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180 .An organism which can monitor air pollution is:

A. Alage

B. Fungi

C. Bacteria

D. Lichen

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