Science and Environment Quiz: Day 57

January 2, 2023

The device which converts radiant energy into electrical energy is

(A) Fan
(B) Solar cell
(C) Cell
(D) Television

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Answer : B

Consider the following statement :
1. Pure water is a good conductor of electricity.
2. Secondary cell can be used only once.
3. To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell.
Which of the statement is/are correct:

(A) Only 1 and 2
(B) Only 2 and 3
(C) Only 1 and 3
(D) None of the these

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Answer : D

Consider the following statement :
1. Electron flow is in the same direction to conventional current flow.
2. The fuse wire does not melt whenever there is overload in the wiring.
3. The electrical conductivity of the semiconductor is in between a conductor and an insulator.
Which of the statement is/are correct:

(A) Only 1 and 2
(B) Only 2 and 3
(C) Only 3
(D) All of the these

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Answer : C

In current electricity, a positive charge refers to

(A) Presence of electron
(B) Presence of proton
(C) Absence of electron
(D) Absence of proton

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Answer : C

Resistance of a wire depends on

(A) Temperature
(B) Geometry
(C) Nature of material
(D) All the above

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Answer : D

Consider the following statement:
1. The anode in electrolyte is negative
2. Ammeter is connected in parallel in any electric circuit
3. Current can produce magnetic field.
Which of the statement is/are correct:

(A) Only 1 and 2
(B) Only 2 and 3
(C) Only 1 and 3
(D) All of the these

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Answer : B

Assertion (A) : Copper is used to make electric wires.
Reason (R) : Copper has very low electrical resistance.

(A) If both assertion and reason are true and reason is the correct explanation of assertion.
(B) If both assertion and reason are true but reason is not the correct explanation of assertion.
(C) If assertion is true but reason is false.
(D) If assertion is false but reason is true.

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Answer : A

In an electrolyte the current is due to the flow of

(A) Electrons
(B) positive ions
(C) Both (a) and (b)
(D) Neither (a) nor (b)

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Answer : C

Assertion: Electric appliances with a metallic body have three wire connections.
Reason: Three pin connections reduce heating of the connecting wires

(A) If both assertion and reason are true and reason is the correct explanation of assertion.
(B) If both assertion and reason are true but reason is not the correct explanation of assertion.
(C) If assertion is true but reason is false.
(D) If assertion is false but reason is true.

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Answer : C

Kilowatt hour is the unit of

(A) Resistivity
(B) Conductivity
(C) Electrical energy
(D) Electrical power

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Answer : C

Consider the following gases:
1. Carbon dioxide (CO2)
2. Chlorofluorocarbons (CFCs)
3. Methane (CH4)
4. Nitrous Oxide (N2O)
5. Ozone (O3)
Which of the above gases are concerned with Green house Gases?

(A) 1, 2, 3 and 4 only
(B) 1, 2, 3 and 5 only
(C) 1, 2 and 3 only
(D) 1, 2, 3, 4 and 5

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Answer : D

Which of the following would most likely help to slow down the greenhouse effect.

(A) Converting tropical forests into grazing land for cattle.
(B) Ensuring that all excess paper packaging is buried to ashes.
(C) Redesigning landfill dumps to allow methane to be collected.
(D) Promoting the use of private rather than public transport

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Answer : C

The unit for measuring ozone thickness

(A) Joule
(B) Kilos
(C) Dobson
(D) Watt

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Answer :C

Which of the following is not a sedimentary cycle

(A) Nitrogen cycle
(B) Phosphorous cycle
(C) Sulphur cycle
(D) Calcium cycle

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Answer : A

Which of the given plant produces cardiac glycosides?

(A) Calotropis
(B) Acacia
(C) Nepenthes
(D) Utricularia

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Answer : A