AIIMS Physics: Questions 391 - 395 of 500

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Question number: 391

» Kinematics » Motion in a Plane

MCQ▾

Question

A body dropped from a height h with an initial speed zero, strikes the ground with a velocity 4kmh . Another body of same mass is dropped from the same height ‘h’ with an initial speed u=6kmh . Find the final velocity of second body, with which it strikes the ground.

Choices

Choice (4) Response

a.

16kmh

b.

8kmh

c.

213kmh

d.

52kmh

Question number: 392

» Oscillations and Waves » Displacement as a Function of Time

MCQ▾

Question

A particle executes simple harmonic motion with an angular velocity of 2.2rads and maximum acceleration 6.8ms2 . Amplitude of the oscillation is –

Choices

Choice (4) Response

a.

1.0 m

b.

2.0 m

c.

1.4 m

d.

0.94m

Question number: 393

» Rotational Motion » Concepts of Rotational Motion

MCQ▾

Question

A stone of mass 5 kg is attached to a string 1.69m long and is whirled in a horizontal circle. The maximum tension the string can withstand is 20 N. What maximum velocity can be given to the stone without breaking the string?

Choices

Choice (4) Response

a.

2.4ms

b.

3.2ms

c.

3.4ms

d.

2.6ms

Question number: 394

» Thermodynamics » Carnot Engine and Its Efficiency

MCQ▾

Question

If the system takes 150 Cal. heat, and releases 60 cal. to sink, if source temperature is 115°C find the sink temp –

Choices

Choice (4) Response

a.

120 °C

b.

37.4°C

c.

54°C

d.

127°C

Question number: 395

» Magnetic Effects of Current and Magnetism » Earth's Magnetic Field

MCQ▾

Question

The magnetic needle of a tangent galvanometer is deflected at an angle 60°. The horizontal component of earth’s magnetic field 0.44×104T is along the plane of the coil. The magnetic field of coil:

Choices

Choice (4) Response

a.

7.62×104T

b.

7.62×104T

c.

7.62×104T

d.

7.62×105T

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