# Electrostatics-Electric Potential (NEET Physics): Questions 20 - 23 of 25

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## Question number: 20

» Electrostatics » Electric Potential

### Question

Identical point charges, each having *+q * charge, are fixed at each of the points *x = x* _{0}*, x = 3x* _{0}*, x = 5x* _{0} ……… infinite, on the x-axis and an identical point charges, each having *-q * charge, are fixed at each of the points *x = 2x* _{0}*, x = 4x* _{0}*, x = 6x* _{0} ……. infinite. Here x _{0} is a positive constant. Potential at the origin due to the above system of charges is,

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. | 0 |

## Question number: 21

» Electrostatics » Electric Potential

### Question

How much kinetic energy will be gained by an α- particle in going from a point at 70V to another point at 50V?

### Choices

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

a. | 40 MeV | |

b. | 40 keV | |

c. | 40 eV | |

d. | 0 eV |

## Question number: 22

» Electrostatics » Electric Potential

### Assertion (Ꭺ)

A bird perches on a high power line and nothing happens to the bird.

### Reason (Ꭱ)

The level of bird is very high from the ground.

### Choices

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

a. | Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ | |

b. | Both Ꭺ and Ꭱ are false | |

c. | Ꭺ is true but Ꭱ is false | |

d. | Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ |

## Question number: 23

» Electrostatics » Electric Potential

### Question

*A * point *Q * lies on the perpendicular bisector of an electrical dipole of dipole moment p. If the distance of *Q * from the dipole is *r * (much larger than the size of the dipole), then electric field at *Q * is proportional to

### Choices

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

a. | p | |

b. | p and r | |

c. | p and r | |

d. | P |