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Physics > Chapter 1 - Measurement > Flashcards

Chapter 1 - Measurement Flashcards

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1
Q

What are the I.S units and symbol for the following: Length, Mass, Time, Temperature, Electric current

A 
Length: Metre m
Mass   : Kilogram kg
Time    : Second   s
Temperature: Kelvin k
Electric Current: ampere A
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2
Q

What are the symbol for the following Quantities: Area, Volume, Speed, Density

A

Area: m^2
Volume: m^3
Speed: ms^-1
Density: Kgm^-3

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3
Q

Kilo =

A

10^3

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4
Q

Micro =

A

10^-6

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5
Q

Giga =

A

10^9

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6
Q

Nano

A

10^-9

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7
Q

Milli =

A

10^-3

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8
Q

Centi =

A

10^-2

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9
Q

Mega =

A

10^6

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10
Q

Physical Quantities are classified into two types, Base Quantities and Derived Quantities. What are the examples for each types?

A

Base Quantities: Length, Time, Mass, Temperature

Derived Quantities: Speed, Moment, Pressure, Volume

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11
Q

How to avoid parallax errors

A

Eye level must be placed vertically above the length measured

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12
Q

Accuracy of Vernier Calipers

A

0.01cm

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13
Q

In Vernier Calipers, there is a positive zero error of 0.03cm, what should you do to the measurement in order to obtain the correct measurement?

A

Minus 0.03cm from the measurement obtained.

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14
Q

In Vernier Calipers, there is a negative zero error of 0.03cm, what should you do to the measurement in order to obtain the correct measurement?

A

Plus 0.03cm to the measurement obtained

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15
Q

There is a negative zero error on the Vernier Calipers, with the observation of 0.07cm on the vernier scale. What is the value of negative zero error?

A

10-7=3 hence, is 0.03cm

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16
Q

Accuracy of micrometer screw gauge

A

0.001cm

17
Q

Period is defined as?

A

Time taken to complete one oscillation

18
Q

Time for one complete to-and-fro movement of the pendulum
(A-B-C-B-A) is one period.
True or False?

A

True

19
Q

Why we measure the time for 20 oscillations/ swings instead of 1 oscillation?

A

This is to reduce the inaccuracy caused by human reaction,so make the result (Period T) obtained more accurate

20
Q

The period of a pendulum is ONLY dependent on _ of the pendulum?

A

Length

21
Q

If the length increases, the period of pendulum will _

A

Increases at the decreasing rate

22
Q

Radius of an atom

A

10^-10cm

Physics (21 decks)

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