NEET Physics: Questions 2088 - 2091 of 2099

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Question number: 2088

» Electronic Devices » Junction Transistor

Appeared in Year: 2016

MCQ▾

Question

For CE transistor amplifier, the audio signal voltage across the collector resistance of 2kΩ is 4V . If the current amplification factor of the transistor is 100 and the base resistance is 1kΩ , then the input signal voltage is –

Choices

Choice (4) Response
a.

20mV

b.

10mV

c.

30mV

d.

15mV

Question number: 2089

» 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 B . It is then bent into a circular coil of n turns. The magnetic field at the centre of this coil of n turns will be –

Choices

Choice (4) Response
a.

nB

b.

n2B

c.

2n2B

d.

2nB

Question number: 2090

» Laws of Motion » Law of Conservation of Linear Momentum

Appeared in Year: 2016

MCQ▾

Question

Two identical balls A and B having velocities of 0.5ms and 0.3ms respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be –

Choices

Choice (4) Response
a.

0.3ms and 0.5ms

b.

0.3ms and 0.5ms

c.

0.5ms and 0.3ms

d.

0.5ms and 0.3ms

Question number: 2091

» 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 30° with an electric field intensity 2×105NC . It experiences a torque equal to 4Nm . The charge on the dipole, if the dipole length is 2cm , is –

Choices

Choice (4) Response
a.

5mC

b.

7μC

c.

2mC

d.

8mC

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