NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 220 - 223 of 2184

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Question number: 220

» Laws of Motion » Force and Inertia

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MCQ▾

Question

The roadway bridge over a canal is the form of an arc of a circle of radius 20 m. What is the minimum speed with which a car can cross the bridge without leaving contact with the ground at the highest point (g = 9.8 m/s 2)

Choices

Choice (4) Response

a.

5 m/s

b.

289 m/s

c.

14 m/s

d.

7 m/s

Question number: 221

» Laws of Motion » Force and Inertia

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MCQ▾

Question

A cane filled with water is revolved in a vertical circle of radius 0.5 m and the water does not fall down n maximum period of revolution must be –

Choices

Choice (4) Response

a.

4.25

b.

14.15

c.

2.45

d.

1.45

Question number: 222

» Kinematics » Average Speed and Instantaneous Velocity

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MCQ▾

Question

A train has to negotiate a curve of radius 600 m. By how much should the outer rail be raised with respect to inner rail for a speed of 48 km/hr. The distance between the rails is 2 m.

Choices

Choice (4) Response

a.

4.5 m

b.

4.5 cm

c.

12 cm

d.

12 m

Question number: 223

» Electrostatics » Electric Flux

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MCQ▾

Question

A solid sphere S 1 is connected to a charge reservoir through a heater H as shown in figure.

Two Solid Spheres given in figure

Two Solid Spheres Given in Figure

Two solid spheres connected with heater.

Flux through a closed spherical surface around S l is given by = a t 2 where a is a constant and t is time in seconds. If resistance of heater is R then select correct statements

(1) Power consumed by heater will be 4α 2 ϵ02 Rt 2.

(2) Electric flux through a closed spherical surface around S 2 will be - α t 2.

(3) Rate of change of electric flux through a closed spherical surface around S 2 will be -2α t

(4) All of the above are correct.

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

2 and 4

b.

1 and 3

c.

1,2 and 3

d.

1 and 2