NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 2128 - 2131 of 2142

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Question number: 2128

» Electromagnetic Induction & Alternating Currents » AC Generator and Transformer

Appeared in Year: 2017

MCQ▾

Question

In a common emitter transistor amplifier the audio signal voltage across the collector is 3V. The resistance of collector is . If current gain is and the base resistance is , the voltage and power gain of the amplifier is:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2129

» Dual Nature of Matter and Radiation » De-Broglie Relation

Appeared in Year: 2017

MCQ▾

Question

The de-Broglie wavelength of a neutron in thermal equilibrium with heavy water at a temperature (Kelvin) and mass , is –

Choices

Choice (4) Response

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b.

c.

d.

Question number: 2130

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

Appeared in Year: 2017

MCQ▾

Question

In an electromagnetic wave in free space the root mean square value of the electric field is The peak value of the magnetic field is:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2131

» Work, Energy and Power » Conservative and Non-Conservative Forces

Appeared in Year: 2017

MCQ▾

Question

Suppose the charge of a proton and an electron differ slightly. One of them is , the other is . If the net of electrostatic force and gravitational force between two hydrogen atoms placed at a distance (much greater than atomic size) apart is zero, then is of the order of –

Choices

Choice (4) Response

a.

b.

c.

d.

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