# IGCSE Physics Paper-1: Specimen Questions with Answers 45 - 46 of 149

## Question number: 45

### Question

Complete the table below

Load (N) | 0 | 1 | 2 | 3 |

Length (cm) | 15.2 | 16.2 | 17.3 | 18.6 |

Extension (cm) | 0 | 1.0 | ________ | 3.4 |

Find missing figure in the table?

### Choices

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

a. | 17.3 | |

b. | 2.1 | |

c. | 18.3 | |

d. | 17.4 |

### Answer

b.### Explanation

Here due to load extension of rubber is taking places.

From first column, when load is zero, extension is zero so original length is 15.2.

Now as load increases, the length of rubber extended. Therefore for load 2 N, the length measured is 17.3 cm.

And original length is 15.2

So missing figure in extension of length is,

## Question number: 46

### Question

Find 2 faulty ammeters, if there are 2 faulty ammeters and 2 perfect ammeters in series.

The readings on the ammeters are

A1 | 2.9A |

A2 | 3.1A |

A3 | 3.1A |

A4 | 3.3A |

### Choices

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

a. | A | |

b. | A | |

c. | A | |

d. | A |

### Answer

b.### Explanation

Here in given circuit diagram four ammeters are connected in series. In series same current passes through all elements which are connected in series. Therefore same current passing through all the ammeters, thus same reading should be indicated. But from given data A_{1} and A_{4} gave different readings from A_{2} and A_{3}. So A_{1} and A_{4} are the faulty ammeter.