Q.1
The unit of capacitance is
  • henry
  • ohm
  • farad
  • farad/m
Q.2
In a cable capacitor, voltage gradient is maximum at the surface of the
  • earth
  • conduction
  • sheath
  • insulator
Q.3
Laplacian of a vector is ___________ of gradient of its divergence and its curl of curl.
  • addition
  • difference
  • multiplication
  • division
Q.4
The dielectric constant (relative permittivity) of glass is given by
  • 0.1 to 0.4
  • 0.5 to 1.0
  • 2.0 to 4.0
  • 5 to 100
Q.5
The sparking between two electrical contacts can be reduced byinserting a
  • Capacitor in parallel with contacts
  • Capacitor in series with each contact
  • Resistance in line
  • None of the above
Q.6
A capacitance off if is connected in series with a resistance of£The time constant of the circuit is
  • 0.2 s
  • 0.4
  • 0.6 s
  • 0.8 s
Q.7
Is that property of a capacitor which delays any change of voltageacross it.
  • Inductance
  • Capacitance
  • Potential gradient
  • None of the above
Q.8
The property of a capacitor to store electricity is called its
  • capacitance
  • charge
  • energy
  • none of the above
Q.9
Dielectric stregth______with increasing thickness
  • increases
  • decreases
  • remains unaltered
  • none of the above
Q.10
The unit of dielectric strength is given by
  • V/m
  • V2/m
  • m/V
  • m/V2
Q.11
Electric intensity at any point in an electric field is equal to the at thatpoint.
  • electric flux
  • magnetic flux density
  • potential gradient
  • none of the above
Q.12
The value of E within the field due to a point charge can be found withthe help of
  • Faraday's laws
  • Kirchhoff s laws
  • Coulomb's laws
  • none of the above
Q.13
The unit of electric instensity is
  • N/C2
  • Wb/m2
  • N/C
  • N2/C
Q.14
The number of Faraday tubes of flux passing through a surface in anelectric field is called
  • electric flux
  • electric flux density
  • magnetic flux density
  • electric charge density
Q.15
A unit tube of flux is known as tube
  • Newton
  • Faraday
  • Michale
  • None of the above
Q.16
The total deficiency or excess of electrons in a body is known as
  • current
  • voltage
  • potential gradient
  • charge
Q.17
A single core cable used onV has conductor diametermm and the in¬ternal diameter of sheathmm. The maximum electrostatic stress in the cable is
  • 62 x 105 V/m
  • 72 x 105 V/m
  • 82 x 105 V/m
  • 92 x 105 V/m
Q.18
When the dielectric is homogeneous,the potential gradient is
  • uniform
  • non-uniform
  • zero
  • any of the above
Q.19
Capacitors are used for audio frequency and radio frequency couplingand tuning.
  • Air
  • Mica
  • Plastic film
  • Ceramic
Q.20
Capacitors are used in transistor circuits.
  • Ceramic
  • Paper
  • Air
  • Electrolytic
0 h : 0 m : 1 s