Chapter#1

The charge on electron is
Positive
Negative
Neutral
None
Like charges
Repel
Attract
Repel and Attract
None
The value of Coulomb's constant depends upon
Charges
Distance between charges
Medium between charges
Nothing
The relative permitivity of vacuum is
1
2
3
4
Who introduced the concept of electric field
Newton
Einstein
Faraday
Henry
The formula for electric field intensity
E=q₀F
E=q₀/F
E=F+q₀
E=F/q₀
E has how many directions
1
2
3
4
The flux is denoted by
σ
φ
ω
The unit of electric flux is
Nm² C²
Nm² C⁻¹
Nm² C⁻²
None
The flux of closed surface is how many times of enclosed charges
1/ε₀
2/ε₀
ε₀
4ε₀
Volt is a unit of
Electric potential
Work
Force
None
Volt is equal to
Joule/coulomb
joule×coulomb
Coulomb/joule
None
1eV is equal to
1.60×10¹⁹J
1.6×10¹⁸J
1.6×10⁻¹⁹J
1.6×10⁻¹⁸J
The gravitational force is ________ as compared to electrostatic force is
Strong
Very strong
Weak
Very weak
Capacitor is a device to ____ charge..
Store
Gain
Release
None
The electric intensity b/w two oppositely charge parallel plate
ω/ε₀
ω×ε₀
σ/ε₀
None
Attractive forces between unlike charges
True
False
The value of permitivity of free space
8.85×10⁻⁹
8.85×10¹⁰
8.85×10⁻¹²
8.85×10¹²
Electric field intensity is measured in
Henry per coulomb
Ohm per coulomb
Newton per coulomb
Electric field lines are directed radially out ward from positive point charge.
True
False
Xerography is an application of electrostatics.
True
False
Guassian surface is not a closed surface.
True
False
Attractive forces between unlike charges.
True
False
1 pico-farad = 10¹² farad
True
False
The lines of forces directed from negative to positive.
True
False
Potential difference is work done in carrying unit positive charge from A to B while keeping the charge in equilibrium.
True
False
1 volt/meter = 1 newton/coulomb
True
False
Gravitational force F=G m₁m₂/r²
True
False
C=Q/V
True
False
Energy stored in capacitor E= 1/2 CV
True
False
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