Q:

A) less than | B) Greater than |

C) equal to | D) greater than or equal to |

Answer: A) less than

Explanation:

Explanation:

This orbital velocity at the moon is less because orbital velocity =

where 'r ' is the orbital radius. i.e the distance of the body from the centre of the earth and 'g' is the acceleration due to gravity on the body in question. In the case of the moon both r and g are less than in the case of earth.

Q:

A) Depends on their masses | B) Sphere |

C) Disk | D) Both reach at the same time |

Answer & Explanation
Answer: B) Sphere

Explanation:

Explanation:

Time does not depend on mass, else

=> is least for 'sphere' and

hence least time is taken by sphere.

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Q:

A) 3:4 | B) 5:4 |

C) 5:1 | D) 3:2 |

Answer & Explanation
Answer: D) 3:2

Explanation:

Explanation:

In series : E1 + E2 = K(50)

In parallel : E1 - E2 = K(10)

E1 + E2 / E1 - E2 = 5/1

=> E1/E2 = 3/2

The emf's are in the ratio of 3:2.

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Q:

A) A | B) B |

C) C | D) D |

Answer & Explanation
Answer: C) C

Explanation:

Explanation:

To complete the vertical loop, the minimum speed required at the lowest point = .

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Q:

A) Argon, copper, silver | B) Hydrogen, argon, copper |

C) Oxygen, copper, silver | D) Hydrogen, oxygen, Argon |

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Q:

A) Diamagnetic materials | B) Non-magnetic materials |

C) Paramagnetic materials | D) None of the others |

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