In the given figure the capacitors C1, C3, C4, C5 have a capacitance 4 μF each and if the capacitor C2 has a capacitance 10 μF, then effective capacitance between A and B will be 

(1) 2 μF

(2) 4 μF

(3) 6 μF

(4) 8 μF

Subtopic:  Combination of Capacitors |
 85%
From NCERT
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Two identical capacitors, have the same capacitance C. One of them is charged to potential V1 and the other to V2. The negative ends of the capacitors are connected together. When the positive ends are also connected, the decrease in energy of the combined system is 

(1) 14C(V12V22)

(2) 14C(V12+V22)

(3) 14C(V1V2)2

(4) 14C(V1+V2)2

Subtopic:  Energy stored in Capacitor |
 63%
From NCERT
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Three capacitors each of capacity 4 μF are to be connected in such a way that the effective capacitance is 6 μF. This can be done by 

(1) Connecting them in parallel

(2) Connecting two in series and one in parallel

(3) Connecting two in parallel and one in series

(4) Connecting all of them in series

Subtopic:  Combination of Capacitors |
 88%
From NCERT
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Three capacitors of capacitance 3 μF are connected in a circuit. Then their maximum and minimum capacitances will be

(1) 9 μF, 1 μF

(2) 8 μF, 2 μF

(3) 9 μF, 0 μF

(4) 3 μF, 2 μF

Subtopic:  Combination of Capacitors |
 92%
From NCERT
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A capacitor of capacity C1 is charged upto V volt and then connected to an uncharged capacitor of capacity C2. Then final potential difference across each will be 

(1) C2VC1+C2

(2) 1+C2C1V

(3) C1VC1+C2

(4) 1C2C1V

Subtopic:  Capacitance |
 78%
From NCERT
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Four identical capacitors are connected as shown in diagram. When a battery of 6 V is connected between A and B, the charge stored is found to be 1.5 μC. The value of C1 is 

(1) 2.5 μF

(2) 15 μF

(3) 1.5 μF

(4) 0.1 μF

Subtopic:  Combination of Capacitors |
 71%
From NCERT
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Two identical thin rings each of radius R meters are coaxially placed at a distance R meters apart. If Q1 coulomb and Q2 coulomb are respectively the charges uniformly spread on the two rings, the work done in moving a charge q from the centre of one ring to that of other is 

(1) Zero

(2) q(Q2Q1)(21)2.4πε0R

(3) q2(Q1+Q2)4πε0R

(4) q(Q1+Q2)(2+1)2.4πε0R

Subtopic:  Electric Potential |
 55%
From NCERT
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A non-conducting ring of radius 0.5 m carries a total charge of 1.11 × 10–10 C distributed non-uniformly on its circumference producing an electric field E everywhere in space. The value of the line integral l=l=0E.dl(l=0 being centre of the ring) in volt is 

(1) + 2

(2) – 1

(3) – 2

(4) Zero

Subtopic:  Relation between Field & Potential |
From NCERT
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A negatively charged plate has charge density of 2 × 10–6 C/m2. The initial distance of an electron which is moving toward plate but cannot strike the plate, if it is having energy of 200 eV 

(1) 1.77 mm

(2) 3.51 mm

(3) 1.77 cm

(4) 3.51 cm

Subtopic:  Electric Potential Energy |
 56%
From NCERT
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Electric potential is given by

V=6x8xy28y+6yz4z2

Then electric force acting on 2C point charge placed on origin will be 

(1) 2N

(2) 6N

(3) 8N

(4) 20N

Subtopic:  Relation between Field & Potential |
 67%
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