IGCSE Physics Paper-2: Specimen Questions with Answers 1 - 6 of 20
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Question 1
Explanation
The boiling point of the liquid is the temperature at which the vapor pressure of a liquid is equal to the pressure of the atmosphere on the liquid.
Passage
A heating curve of a substance is shown below.
Question 2 (1 of 2 Based on Passage)
Explanation
B and C. Because melting point is the temperature at which a given substance melts, hence in given a heating curve of substance, at points B and C, the substance starts melt and becoming in liquid form.
Question 3 (2 of 2 Based on Passage)
Explanation
D and E. The definition of the boiling point is given as, the temperature at which a liquid boils and turns to vapor. At point D and E substance converts from liquid to gas.
Passage
Figure shows a vertical wire through a horizontal piece of card. There is a current upside the wire.
Figure which is shown below shows the wire and card, viewed from above
The large circle is one of the magnetic field lines caused by the current. On above figure,
Question 4 (1 of 2 Based on Passage)
Explanation
Question 5 (2 of 2 Based on Passage)
Explanation
Question 6
Write in Short Short Answer▾
Define half – life of radioactive substance and give appropriate formula for half – life time.
EditExplanation
Half – life of radioactive substance is defined as, “The time required for amount of radioactive substance to fall to half of its initial value.”
The exponential decay can be described by following equation,
Where, N = Quantity of the radioactive substance still remaining after a time t
Initial quantities of the radioactive substance
Radioactive decay constant
Now, for half life time,