# IGCSE Physics Paper-1: Specimen Questions with Answers 50 - 52 of 149

## Question number: 50

MCQ▾

### Question

Find output voltage if transformer has 240 V connected to its primary with a primary coil of 1200 turns and a secondary coil of 120 turns.

### Choices

Choice (4) | |
---|---|

a. | 200V |

b. | 240V |

c. | 2400 V |

d. | 24V |

### Answer

d.### Explanation

Here Primary coil = 1200 turns

Secondary coil = 120 turns are given.

Now, output voltage can be calculated as,

## Question number: 51

MCQ▾

### Question

Find neutrons if an atom of lithium contains three protons and three electrons and nucleon number (mass number) of the atom is 7.

### Choices

Choice (4) | |
---|---|

a. | 3 |

b. | 6 |

c. | 10 |

d. | 4 |

### Answer

d.### Explanation

Number of neutron can be find as,

## Question number: 52

MCQ▾

### Question

The weights of three objects are given. Which is heaviest?

### Choices

Choice (4) | |
---|---|

a. | object 3 |

b. | object 1 |

c. | object 2 |

d. | Question does not provide sufficient data or is vague |

### Answer

a.### Explanation

Here in above we shows that

In (a) diagram we shows that object 1 is heavier than object 2

In (b) diagram we shows that object 3 is heavier than object 2

So, we can say that objects 1 & 3 are heavier than the object 2

But from (c) diagram we can see that object 3 is heavier than the object 1. Therefore object 3 is heaviest than object 1 and 2.