# IGCSE Physics Paper-2: Specimen Questions with Answers 7 - 12 of 20

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### Passage

Two resistors are connected in parallel with 10 V power supply in circuit given below

## Question 7 (1 of 3 Based on Passage)

### Write in Short Short Answer▾

Calculate the combined resistance of the resistors.

Edit

### Explanation

For parallel resistors, equivalent resistor can be calculated as,

Here, both resistors are of same resistance,

## Question 8 (2 of 3 Based on Passage)

### Write in Short Short Answer▾

Calculate the current I, passing through the circuit,

Edit

### Explanation

Total current in the circuit is calculated by Ohm՚s law as,

## Question 9 (3 of 3 Based on Passage)

### Write in Short Short Answer▾

Calculate current passing through both the parallel resistors, .

Edit

### Explanation

Voltages across both resistors are same, also resistance of both the resistors are same, therefore from Ohm՚s law,

Now, total current is sum of individual current and

### Passage

In an experiment to find the density of some oil, a student takes the following readings.

Mass of empty measuring cylinder = 850 g

Mass of cylinder containing 600 cm3 oil = 2050 g

## Question 10 (1 of 3 Based on Passage)

### Write in Short Short Answer▾

Calculate the mass of oil in the cylinder.

Edit

### Explanation

Mass of oil is calculated as,

## Question 11 (2 of 3 Based on Passage)

### Write in Short Short Answer▾

Calculate the density of the oil.

Edit

### Explanation

Density of the oil is given as,

## Question 12 (3 of 3 Based on Passage)

### Write in Short Short Answer▾

Water is rarer than oil.

On Figure, mark approximately where the surface of the same mass of water would be if it replaced the oil.

Edit

### Explanation

Density of the water is less than oil . Now, the formula of density,

Therefore volume of the water for same mass is more than the oil