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1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ Putting the plates of a charged capacitor
apart Increases the potential difference [other wrong options] [Discuss in forum] Increases the capacitance Does not effect potential difference Decreases the potential difference |
Q22 ⇒ The energy of a charged capacitor resides in Both the electric and magnetic fields [other wrong options] [Discuss in forum] The electric field only The magnetic field only Neither in electric nor magnetic field |
Q23 ⇒ The capacity of a spherical conductor is 1 πF
then its diameter would be 1.8 x 104 metre [other wrong options] [Discuss in forum] 1.8 metre 1.8 x 103 metre 1.8 x 1010 metre |
Q24 ⇒ Check the correct relation Potential = charge/capacity [other wrong options] [Discuss in forum] Charge = potential/capacity Capacity = potential x charge Potential = capacity x charge |
Q25 ⇒ The potential gradient at which the dielectric
of the condensor just gets punctured, is
called Dielectric strength [other wrong options] [Discuss in forum] Dielectric constant Dielectric resistance Dielectric number |
Q26 ⇒ Capacity of a parallel plate condensor can be
increased by Decreasing the distance between the plates [other wrong options] [Discuss in forum] Increasing the distance between the
plates Increasing the thickness of the plates Decreasing the thickness of the plates |
Q27 ⇒ The value of one Farad in e.s.u. will be 9 x 1011 [other wrong options] [Discuss in forum] 3 x 1010 |
Q28 ⇒ Two capacitors each having capacitance C
and break down voltage V are joined in
series. The capacitance and break down
voltage of the combination is [other wrong options] [Discuss in forum] 2C and 2V 2C and V |
Q29 ⇒ If the sheet of a bakelite is inserted
between the plates of an air capacitor,
the capacitance wil increase [other wrong options] [Discuss in forum] decrease remains unchanged become zero |
Q30 ⇒ Which of the following statements is
correct? Electrolytic capacitor must be connected in the correct polarity [other wrong options] [Discuss in forum] Air capacitors have a blackband to
indicate the outside foil Ceramic capacitors must be connected in the correct polarity Mica capacitors are available in capacitance value of 1 to 10 µF |
Q31 ⇒ Which of the following capacitors will
have the least variation? Silver plated mica capacitor [other wrong options] [Discuss in forum] Paper capacitor Ceramic capacitor None of the above |
Q32 ⇒ The capacity of capacitor bank used in
power factor correction is expressed in
terms of kVAR [other wrong options] [Discuss in forum] kW kVA volts |
Q33 ⇒ Dielectric constant for mica is nearly 3 to 8 [other wrong options] [Discuss in forum] 200 100 1 to 2 |
Q34 ⇒ "The surface integral of the normal
component of the electric displacement
D over any closed surface equals the
charge enclosed by the surface". The above statement is associated with Gauss's law [other wrong options] [Discuss in forum] Kirchhoff's law Faraday's law Lenz's law |
Q35 ⇒ If three capacitors C1, C2 and C3 of
values of 1 µF, 2 µF, and 4 µF respectively are in series and connected across a potential of 230V, then charge on each
capacitor is 131 x 10-6 C [other wrong options] [Discuss in forum] 111 x 10-6 C 121 x 10-6 C 161 x 10-6 C |
Q36 ⇒ It was suggested by ____that the
electric field should be imagined to be
divided into tubes of force containing a
fixed number of lines of force. Faraday [other wrong options] [Discuss in forum] Kelvin Newton All of the above |
Q37 ⇒ Electric displacement is a____quantity vector [other wrong options] [Discuss in forum] scalar both of the above none of the above |
Q38 ⇒ In a concentric cable capacitor the
diameters of the inner and outer
cylinders are 3 and 10 mm respectively.
It εr for insulation is 3, find its capacitance
per metre. 138.8 pF [other wrong options] [Discuss in forum] 100 pF 110 pF 118.8 pF |
Q39 ⇒ The capacitance of a capacitor is influenced
by all of the above [other wrong options] [Discuss in forum] plate area plate separation nature of dielectric none of the above |
Q40 ⇒ TIte capacitance G is charged througi
a resistance R. The time constant of the
charging circuit is given by RC [other wrong options] [Discuss in forum] C/R 1/RC R/C |
Or |