NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 722 - 724 of 2184

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Question number: 722

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

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MCQ▾

Question

If an alternating voltage is represented as E = 141 sin (628t), then

(1) The rms voltage is 141V

(2) The rms voltage is 100V

(3) The frequency is 50 Hz

(4) The frequency is 100 Hz

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

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

1,2 and 3 are correct

Question number: 723

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

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MCQ▾

Question

The r. m. s. value of an ac of 50 Hz is 10 A.

(1) Time taken by the alternating current in reaching from zero to maximum value is 5 x 10 -3 sec

(2) Time taken by the alternating current in reaching from zero to maximum value is 2 x 10 -3 sec

(3) The peak current is 14.14 A

(4) The peak current is 7.07 A

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

Choices

Choice (4) Response

a.

1,2 and 3 are correct

b.

1 and 2 are correct

c.

1 and 3 are correct

d.

2 and 4 are correct

Question number: 724

» Experimental Skills » Screw Gauge

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MCQ▾

Question

A T shaped object, dimensions shown in the figure, a1 lying on a smooth floor. A force ‘F is applied at the poi: P parallel to AB, such that the object has only the translational motion without rotation. Find the location of P with respect to C

Object on smooth floor - location of P with respect to C

Object on Smooth Floor - Location of P with Respect to C

Here in above figure we show the object AB on the smooth floor and force f apply.

Choices

Choice (4) Response

a.

b.

c.

d.

I