NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 2087 - 2090 of 2142

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Question number: 2087

» Electronic Devices » Junction Transistor

Appeared in Year: 2016

MCQ▾

Question

For CE transistor amplifier, the audio signal voltage across the collector resistance of is . If the current amplification factor of the transistor is 100 and the base resistance is , then the input signal voltage is –

Choices

Choice (4) Response

a.

20mV

b.

c.

d.

Question number: 2088

» Magnetic Effects of Current and Magnetism » Ampere's Law

Appeared in Year: 2016

MCQ▾

Question

A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is . It is then bent into a circular coil of turns. The magnetic field at the centre of this coil of turns will be –

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2089

» Laws of Motion » Law of Conservation of Linear Momentum

Appeared in Year: 2016

MCQ▾

Question

Two identical balls A and B having velocities of and respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be –

Choices

Choice (4) Response

a.

and

b.

and

c.

and

d.

and

Question number: 2090

» Electrostatics » Torque on a Dipole in a Uniform Electric Field.

Appeared in Year: 2016

MCQ▾

Question

An electric dipole is placed at an angle of with an electric field intensity. It experiences a torque equal to . The charge on the dipole, if the dipole length is , is –

Choices

Choice (4) Response

a.

b.

c.

d.

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