To resolve an object in an electron microscope,

Q:

What is the noise level of normal conversation?

A) About 60 dB	B) About 70 dB
C) About 80 dB	D) About 90 dB

Answer & Explanation Answer: A) About 60 dB

Explanation:

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Q:

As an object falls freely its ___________________.

A) kinetic energy gets converted into potential energy	B) potential energy gets converted into kinetic energy
C) momentum gets converted into gravitational force	D) gravitational force gets converted into momentum

Answer & Explanation Answer: B) potential energy gets converted into kinetic energy

Explanation:

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Q:

Due to an acceleration of 1 $m / s^{2}$ , the velocity of a body increases from 5 m/s to 10 m/s in a certain period. Find the displacement (in m) of the body in that period.

A) 125	B) 37.5
C) 62.5	D) 75

Answer & Explanation Answer: B) 37.5

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Q:

What is measured with the Nephometer?

A) volume of rainfall	B) Cloud volume and speed
C) Salinity of Sea	D) All options are correct.

Answer & Explanation Answer: B) Cloud volume and speed

Explanation:

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Q:

What is the standard room temperature in Kelvin?

A) 98 K	B) 198 K
C) 273 K	D) 373 K

Answer & Explanation Answer: A) 98 K

Explanation:

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Q:

An object, starting from rest, moves with constant acceleration of 4 m/s2. After 8 s, its speed is

A) 16 m/s	B) 8 m/s
C) 32 m/s	D) 4 m/s

Answer & Explanation Answer: C) 32 m/s

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Q:

1 watt is equal to 1 ____________

A) J s-1	B) J s
C) J s-2	D) J

Answer & Explanation Answer: A) J s-1

Explanation:

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Q:

A body is initially moving with a velocity of 10 m/s. It undergoes an acceleration of 2 m/s2 for 5 seconds. Find the displacement (in m) of this body in these 5 seconds.

A) 25	B) 37.5
C) 50	D) 75

A) the wavelength of the electrons must be close to the diameter of the object	B) the wavelength of the electrons must be greater than the diameter of the object.
C) Both A & B	D) None of the above

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