# AP (Advanced Placement) Physics(B-C): Questions 674 - 678 of 921

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## Question number: 674

### Question

What is the separation between two slits for which light has its second maximum at an angle of ?

### Choices

Choice (5) | Response | |
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e. | None of the above |

## Question number: 675

### Question

Three identical charges are located on the vertex of an equilateral triangle of side . What is the amount of work done to assemble charges in triangular arrangement?

### Choices

Choice (5) | Response | |
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e. | None of the above |

## Question number: 676

### Question

A uniform rod of mass and length , balances horizontally, when the pivot placed at mid-point of rod. When an unknown object is hanged on right end of the rod, the pivot must be move right side from the mid-point of the rod. What is the approximate mass of unknown object?

### Choices

Choice (5) | Response | |
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e. | All of the above |

## Question number: 677

### Question

If the decay constant of radioactive isotope is , then what is the half – life of this radioactive isotope?

### Choices

Choice (5) | Response | |
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e. | Question does not provide sufficient data or is vague |

## Question number: 678

### Question

As a result of the emission of an alpha particle, an atomic nucleus

### Choices

Choice (5) | Response | |
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a. | Decreases its atomic number by and increases its mass number by | |

b. | Increases its atomic number by and decreases its mass number by | |

c. | Decreases its atomic number by and decreases its mass number by | |

d. | Increases its atomic number by and increases its mass number by | |

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