NEET Physics: Questions 725 - 729 of 2098

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Question number: 725

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

MCQ▾

Question

An alternating voltage E=2002sin(100t) is connected to a 1 µF capacitor through an ac ammeter. The reading of the ammeter will be

Choices

Choice (4) Response

a.

40 mA

b.

10 mA

c.

20 mA

d.

80 mA

Question number: 726

» Experimental Skills » Screw Gauge

MCQ▾

Question

Three identical metal balls each of radius r are placed touching each other on a horizontal surface such that an equilateral triangle is formed, when centers of three balls are joined. The center of the mass of system is located at

Choices

Choice (4) Response

a.

Line joining centers of any two balls

b.

Centre of one of the balls

c.

Horizontal surface

d.

Point of intersection of the medians

Question number: 727

» Electromagnetic Induction & Alternating Currents » Peak and RMS Value of AC

MCQ▾

Question

The frequency of an alternating voltage is 50 cycles/sec and its amplitude is 120 V. Then the r. m. s value of voltage is

Choices

Choice (4) Response

a.

56.5V

b.

70.7V

c.

84.8V

d.

101.3V

Question number: 728

» Experimental Skills » Screw Gauge

MCQ▾

Question

Four particles of masses m, 2m, 3m and 4m are arranged at the corners of a parallelogram with each side equal to a and one of the angle between two adjacent sides is 60°. The parallelogram lies in the x-y plane with mass-m at the origin and 4m on the x-axis. The center of mass of the arrangement will be located at

Choices

Choice (4) Response

a.

(a2,3a4)

b.

(0.95a,34,)

c.

(32a,0.95a)

d.

(3a4,a2)

Question number: 729

» Electromagnetic Induction & Alternating Currents » Electromagnetic Induction

Assertion-Reason▾

Assertion (Ꭺ)

An aircraft flies along the meridian, the potential at the ends of its wings will be the same.

Reason (Ꭱ)

Whenever there is change in the magnetic flux e. m. f. induces.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

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

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