# IGCSE Physics Paper-2: Specimen Questions with Answers 1 - 6 of 20

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## Question 1

### Write in Brief One Liner▾

Define the boiling point of the liquid:

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### 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)

### Write in Short Short Answer▾

Which points shows the melting point of the substance?

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### 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)

### Write in Short Short Answer▾

Which points shows the boiling points of the substance?

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### 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)

### Write in Short Short Answer▾

Show the direction of the magnetic field

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## Question 5 (2 of 2 Based on Passage)

### Write in Short Short Answer▾

Carefully draw two more magnetic field lines.

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## Question 6

### Write in Short Short Answer▾

Define half – life of radioactive substance and give appropriate formula for half – life time.

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### Explanation

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