NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics: Questions 313 - 316 of 5119

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Question 313

Question MCQ▾

A stone of mass 1 kg tied to a light inextensible string of length L = m is whirling in a circular path of radius L in a vertical plane. If the ratio of the maximum tension in the string to the minimum tension in the suing is 4 and if g is taken to be 10m/sec2 , the speed of the stone at the highest point of the circle is

Choices

Choice (4)Response

a.

m/sec

b.

7.07 m/sec

c.

20 m/sec

d.

m/sec

Edit

Question 314

Question MCQ▾

In the rectangle shown below, the two corners have charges q1 = -5 μC and q2 = + 2.0 μC. The work done by external agent in moving a charge q = + 3.0 μC slowly from B to A is

(Take l/4π0 = 1010 Nm2 /C2)

Rectangular Figure with Charges Given

Choices

Choice (4)Response

a.

3.5 J

b.

4.5 J

c.

2.8 J

d.

5.5 J

Edit

Question 315

Question MCQ▾

A boy standing on a weighing machine observes his weight as 200 N. When he suddenly jumps upwards, his friend notices that the reading increased to 400 N. The acceleration by which the boy jumped will be

Choices

Choice (4)Response

a.

4.9 m/s2

b.

9.8 m/s2

c.

29.4 m/s2

d.

14.7 m/s2

Edit

Question 316

Question MCQ▾

A swimmer can swim in still water at a rate 4 km/h. If he swims in a river flowing at 3 km/h and keeps his direction (w. r. t. water) perpendicular to the current. Find his velocity w. r. t. the ground.

Choices

Choice (4)Response

a.

3 km/hr

b.

4 km/hr

c.

7 km/hr

d.

5 km/hr

Edit