NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 772 - 776 of 2142

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Question number: 772

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

MCQ▾

Question

The current in the primary coil of a transformer (assuming no power loss) as shown in fig. will be –

Transformer consist of two coils

Transformer Consist of Two Coils

In figure two coils transformer is shown with 220 Ω resistor. Vp is the primary coil voltage and VC is the secondary coil voltage.

Choices

Choice (4) Response

a.

10 -6 A

b.

1.0A

c.

0.01 A

d.

0.1 A

Question number: 773

» Experimental Skills » Screw Gauge

MCQ▾

Question

n the NaCl molecule, the separation between the nuclei of the two atom is about 2.36 Å (1 Å = 10 -10 m). The approximate location of the center of mass from the sodium atom, assuming the mass of chlorine atom 35.5 and mass of sodium atom is

22.98 Å

Choices

Choice (4) Response

a.

2.212 Å

b.

1.5 Å

c.

1.24 Å

d.

l Å

Question number: 774

» Electromagnetic Induction & Alternating Currents » Reactance and Impedance

MCQ▾

Question

A resistance of 300 Ω and an inductance of 1/π henry are connected in series to a ac voltage of 20 volt and 200 Hz frequency. The phase angle between the voltage and current is,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 775

» Work, Energy and Power » Work Done

MCQ▾

Question

A force F = (3 - 1x + 5x 2) N is applied on a 2 kg mass which displaces it from x = 0 to x = 2 m. Work done in joule is -

Choices

Choice (4) Response

a.

17.33

b.

13

c.

20.45

d.

7.55

Question number: 776

» Experimental Skills » Screw Gauge

MCQ▾

Question

2 bodies of different masses of 2 kg and 4 kg are moving with, velocities 20 m/s and 10 m/s towards each other due to mutual gravitational attraction. What is the velocity of their center of mass?

Choices

Choice (4) Response

a.

8 m/s

b.

6 m/s

c.

Zero

d.

5 m/s

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