If \(u_1\) and \(u_2\) are the units selected in two systems of measurement and \(n_1\) and \(n_2\) are their numerical values, then:

1. \(n_1u_1=n_2u_2\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \)
2. \(n_1u_1+n_2u_2=0\)
3. \(n_1n_2=u_1u_2\)
4. \((n_1+u_1)=(n_2+u_2)\)

Subtopic:  Dimensions |
 85%
From NCERT
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eV is 

(1) Same as one joule

(2) 1.6×1019J

(3) 1 V

(4) 1.6×1019C

Subtopic:  Dimensions |
 75%
From NCERT
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1kWh=

(1) 1000W

(2) 36×105J

(3) 1000J

(4) 3600J

Subtopic:  Dimensions |
 65%
From NCERT
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Universal time is based on :

(1) Rotation of the earth on its axis

(2) Earth's orbital motion around the Sun

(3) Vibrations of cesium atom

(4) Oscillations of quartz crystal

Subtopic:  Dimensions |
From NCERT
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Unit of moment of inertia in MKS system 

(1) kg×cm2

(2) kg/cm2

(3) kg×m2

(4) Joule×m

Subtopic:  Dimensions |
 67%
From NCERT
PMT - 1984
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Unit of stress is 

(1) N/m

(2) Nm

(3) N/m2

(4) Nm2

Subtopic:  Dimensions |
 76%
From NCERT
PMT - 1984
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Unit of magnetic moment is

(1) Amperemetre2

(2) Amperemetre

(3) Webermetre2

(4) Weber​​/metre

Subtopic:  Dimensions |
 54%
From NCERT
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Curie is a unit of 

1. Energy of γ-rays

2. Half life

3. Radioactivity

4. Intensity of γ-rays

Subtopic:  Dimensions |
 73%
From NCERT
PMT - 1992
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Hertz is the unit of

(1) Frequency

(2) Force

(3) Electric charge

(4) Magnetic flux

Subtopic:  Dimensions |
 92%
From NCERT
PMT - 1999
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One pico Farad is equal to

(1) 1024F

(2) 1018F

(3) 1012F

(4) 106F

Subtopic:  Dimensions |
 79%
From NCERT
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