AIIMS Physics: Questions 249 - 252 of 500

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Question number: 249

» X - Rays » Bragg's Law

Appeared in Year: 2004

Assertion-Reason▾

Assertion (Ꭺ)

Crystalline solids can cause X-rays to diffract.

Reason (Ꭱ)

Interatomic distance in crystalline solids is of the order of 0.1 nm.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

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

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are false

Question number: 250

» Properties of Solids & Liquids » Pressure Due to a Fluid Column

MCQ▾

Question

The pressure required to reduce the volume of a rubber ball by Equation is –

Equation .

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 251

» Kinematics » Relative Velocity

MCQ▾

Question

A bike can be stopped by brakes after at least 10 m, when it moving with a speed of Equation . If the same bike is moving with Equation , the minimum stopping distance is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 252

» Rotational Motion » Concepts of Rotational Motion

MCQ▾

Question

If the equation for the displacement of a particle moving on a circular path is given by Equation , where Equation is in radians and t in seconds, then the angular velocity of the particle after 3 s from its start is –

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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