AIIMS Physics: Questions 490 - 494 of 500

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Question number: 490

» Electrostatics » Capacitors

Appeared in Year: 1999

MCQ▾

Question

Eight equally charged drops are combined to form a big drop. If the potential on each drop is 10V then potential of big drop will be – [AIPMT]

Choices

Choice (4) Response

a.

20V

b.

10V

c.

30V

d.

40V

Question number: 491

» Communication System » Basic Elements of Communication System

MCQ▾

Question

If the T. V. telecast is to cover a radius of 130km , than the height of transmitting antenna is –

Choices

Choice (4) Response

a.

1300.7m

b.

1400m

c.

1320.3m

d.

1260.5m

Question number: 492

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

MCQ▾

Question

The magnetic flux linked with a coil varies with time, given as, ϕ=(3t2+2t+6)weber . The induced emf at 2 sec is –

Choices

Choice (4) Response

a.

14V

b.

6V

c.

12V

d.

11V

Question number: 493

» Rotational Motion » Conservation of Angular Momentum

MCQ▾

Question

A rotating platform of moment of inertia 120kgm2 completes one rotation in 20 seconds. A person of mass 80kg is standing at the centre of platform. If the person moves at a distance of 1m from the centre along the radius then find the angular velocity of the platform.

Choices

Choice (4) Response

a.

π200rads

b.

3π50rads

c.

π50rads

d.

3π200rads

Question number: 494

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A spherical solid ball of mass 1kg and radius 3 cm is rotating about its own axis with an angular velocity of 50 radians per second. Find its kinetic energy of rotation.

Choices

Choice (4) Response

a.

0.225J

b.

0.45J

c.

2.25J

d.

4.5J

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