NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1896 - 1900 of 2184

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Question number: 1896

» Experimental Skills » Zener Diode

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MCQ▾

Question

A Zener diode operates on which of the following bias?

Choices

Choice (4) Response

a.

No biasing is required for it.

b.

forward and reverse bias.

c.

Reverse bias

d.

Forward bias

Question number: 1897

» Experimental Skills » Meter Bridge

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MCQ▾

Question

If the wire in the experiment to determine the resistivity of a material using meter bridge is replaced by copper or hollow wire the balance point i. e. null point shifts to

Choices

Choice (4) Response

a.

at same point

b.

left

c.

right

d.

None of the above

Question number: 1898

» Gravitation » Kepler's Laws of Planetary Motion

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MCQ▾

Question

The mass and radius of earth and moon are M 1, R 1 and M 2, R 2 respectively. Their centers are d distance apart. With what velocity should a particle of mass m be projected from the mid-point of their centers so that it may escape out to infinity–

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1899

» Gravitation » Universal Law of Gravitation

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MCQ▾

Question

If the period of revolution of an artificial satellite just above the earth be T second and the density of earth be ρ, kg/m 3 then

(G = 6.67 ⨯ 10 -11 m 3 /kg. second 2)

Choices

Choice (4) Response

a.

ρT 2 varies with time

b.

c.

ρT 2 is a universal constant

d.

Both b. and c. are correct

Question number: 1900

» Communication System » Bandwidth of Transmission Medium

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MCQ▾

Question

The characteristic impedance of a coaxial cable is of the order of,

Choices

Choice (4) Response

a.

50Ω

b.

200Ω

c.

270Ω

d.

All of the above