AIIMS Physics: Questions 281 - 284 of 500

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 500 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 350.00 or

Question number: 281

» Properties of Solids & Liquids » Stress-Strain Relationship

MCQ▾

Question

A metal wire of cross – sectional area 7×106m2 is held taut at 350C between two rigid supports with negligible tension in it. Find the tension developed in the wire if it is cooled to 250C .

(Given α of metal =2×105K1 and Y=1×1011Nm2 )

Choices

Choice (4) Response

a.

900 N

b.

700 N

c.

760 N

d.

840 N

Question number: 282

» Oscillations and Waves » Longitudinal and Transverse Waves

Appeared in Year: 2003

Assertion-Reason▾

Assertion (Ꭺ)

When a beetle moves along the sand within a few tens of centimeters of a sand scorpion, the scorpion immediately turns towards the beetle and dashes towards it.

Reason (Ꭱ)

When a beetle disturbs the sand, it sends pulses along the sand’s surface. One set of pulses is longitudinal while the other set is transverse.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

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

c.

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

d.

Ꭺ is false but Ꭱ is true

Question number: 283

» Oscillations and Waves » Standing Waves in Strings and Organ Pipes

MCQ▾

Question

An organ pipe closed at one end has fundamental frequency of 2000 Hz. The maximum number of overtones generated by this pipe which a normal person can hear is –

Choices

Choice (4) Response

a.

20

b.

10

c.

5

d.

15

Question number: 284

» Properties of Solids & Liquids » Viscosity

MCQ▾

Question

800m3 of a viscous liquid flows per unit time due to a pressure head Δp along a pipe of diameter d and length l . Instead of this pipe, a set of eight pipes each of the diameter d2 and length 2l is connected to the same pressure head Δp . What will be the volume of liquid flowing per unit time?

Choices

Choice (4) Response

a.

400m3

b.

200m3

c.

100m3

d.

800m3

Sign In