NDA PHYSICS QUIZ - 24

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Question 1:

Which of the following forces is responsible for separation of cream from milk in a cream separator? 

Question 2:

Two trains A and B of length 400 m each are moving on two parallel tracks with a uniform speed of 72 km/h in the same direction, with A ahead of B. The driver of B decides to overtake A and accelerates by 1 m/s2. If after 50 s, the guard of B just brushes past the driver of A, what was the original distance between them?

Question 3:

A boy of mass 40 kg running at 4 m/s jumps on to a 20 kg trolley travelling in the same direction at 1 m/s. What is their common velocity ?

Question 4:

Which of the following are good conductors of electricity?

Question 5:

Which of the following is a vector quantity?

Question 6:

Which of the following statements is/are true regarding dimension of physical quantities? 

Question 7:

A wire is 1.0 m long, 0.2 mm in diameter and has a resistance of 10 Ω. Which of the following is the resistivity of its material ?

Question 8:

Two resistances when connected in parallel give resultant value of 2 ohm; when connected in series the value becomes 9 ohm. Calculate the value of each resistance.

Question 9:

Which of the following is true for the image formed by a plane mirror?

Question 10:

Which of the following physical quantities of a body does not change even when it reaches moon ?