NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 1644 - 1649 of 2142

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Question number: 1644

» Electronic Devices » Semiconductors

MCQ▾

Question

Which statement is correct?

Choices

Choice (4) Response

a.

N-type and P-type germanium are neutral

b.

N-type and P-type germanium are negatively charged

c.

N-type germanium is positively charged and P-type germanium is negatively charged

d.

N-type germanium is negatively charged and P-type germanium is positively charged

Question number: 1645

» Electronic Devices » Semiconductors

MCQ▾

Question

At zero Kelvin a piece of germanium

Choices

Choice (4) Response

a.

Becomes bad conductor

b.

Becomes good conductor

c.

has maximum conductivity

d.

Becomes semiconductor

Question number: 1646

» Oscillations and Waves » Displacement as a Function of Time

MCQ▾

Question

The amplitude of a particle executing SHM is 5.5 cm. At the mean position the speed of the particle is 20 cm/s. The distance of the particle from the mean position at which the speed of the particle becomes Equation , will be

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

2 cm

d.

5.46 cm

Question number: 1647

» Electronic Devices » Semiconductors

MCQ▾

Question

When a semiconductor is heated, its resistance

Choices

Choice (4) Response

a.

Increases

b.

Decreases

c.

Nothing is definite

d.

Remains unchanged

Question number: 1648

» Oscillations and Waves » Periodic Functions

MCQ▾

Question

A chimpanzee swinging on a swing in a sitting position, stands up suddenly, the time period will

Choices

Choice (4) Response

a.

Remain same

b.

Decrease

c.

Become infinite

d.

Increase

Question number: 1649

» Oscillations and Waves » Simple Harmonic Motion » Oscillations of a Spring

MCQ▾

Question

Three masses 700g, 500g, and 400g are suspended at the end of a spring are in equilibrium. When the 700g mass is removed, the system oscillates with a period of 3 seconds, when the 500 gm mass is also removed; it will oscillate with a period of,

Choices

Choice (4) Response

a.

2 s

b.

Equation s

c.

1 s

d.

3 s

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