Experimental Skills-Screw Gauge (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 9 - 12 of 29

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Question number: 9

» Experimental Skills » Screw Gauge

Assertion-Reason▾

Assertion (Ꭺ)

The center of mass of a proton and an electron, released from their respective positions remains at rest.

Reason (Ꭱ)

The center of mass remains at rest, if no external force is applied.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

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

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

Question number: 10

» Experimental Skills » Screw Gauge

MCQ▾

Question

The velocities of three particles of masses 20g, 30g and 50g are 10i, 10j and 10k respectively. The velocity of the center of mass of the three particles is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 11

» Experimental Skills » Screw Gauge

MCQ▾

Question

The two particles X and Y, initially at rest, start moving towards each other under mutual attraction. If at any instant the velocity of X is V and that of Y is 2V, the velocity of their center of mass will be 3

Choices

Choice (4) Response

a.

0

b.

V

c.

V/2

d.

2V

Question number: 12

» Experimental Skills » Screw Gauge

MCQ▾

Question

A T shaped object, dimensions shown in the figure, a1 lying on a smooth floor. A force ’F is applied at the poi: P parallel to AB, such that the object has only the translational motion without rotation. Find the location of P with respect to C

Choices

Choice (4) Response

a.

b.

c.

I

d.

f Page