There are 27 drops of a conducting fluid Each has a radius r

111 A series LCR circuit has resonant tangular frequency oo and a large quality factor Q The approximate form for its impedance at high ble frequencies in terms of R 6 Q and wo here is the angular frequency of of ac source and j 1 and R is not very high 1 Z R 1952 Q Rw 2 Z 3 2 3 Z 4 Z VEGEDT 8 QRwo 5 QRw Est

Test 1 Online 13 It is observed that as one moves along positive x axis the electrostatic potential reduces One may conclude that the direction of electric field 1 Must be along x axis 2 Must be perpendicular to x axis 3 May be perpendicular to x axis 4 May be along x axis 14 A parallel plate capacitor has a uniform electric field E in space between the plates If the distance between the plates is d and area of the plate is A the energy stored in the capacitor is 1 EAd 3 E Ad 4 E 15 A capacitor of capacitance C is charged upto 90 V and then connected to an uncharged capacitor of capacitance 2C The final potential difference across each capacitor will be 1 45 V 3 90 V 16 In a certain region potential is given by V K 2xy The electric field at 1 1 has magnitude 1 2 k 2 2 2 k Medical 3 k 2 1 2 30 V 4 60 V 17 The variation of electrostatic potential as a function of distance from a point charge is best represented by X 12 ITutor All India Aakash Test Series for NEET 2021 18 On an insulated rod of length charge Q is uniformly distributed and a point charge q is placed at a distance d from one of its ends as shown The electric force on q is Q 2 3 K qQ 4d d c 9Q 4 9Q n Foundations 4TE X d Divisions of ash A4 C charge is placed in some gaussian surface such that outward flux is 6 What additional charge is needed to be placed inside the surface such that there is net inward flux of magnitude 66 1 6 C 2 14 C 3 28 C 4 10 C 20 When a polythene is rubbed with wool it develops a charge 3 2 x 10 7 C The number of electrons transferred is 1 2 10 3 10 d X 2 8 x 10 0 4 2 x 10 2

Two large conducting sheets are kept parallel to each other as shown In equilibrium the charge density on facing surfaces is d and o Which of the following may not be electric field at A 1 N A So 0 0 i 5 2 0 1 0 0 i

Point charges 4q q and 4q are kept on the X axis at points x 0 x a and x 2a respectively Then 1988 a b c d only q is in stable equilibrium none of the charges is in equilibrium all the charges are in unstable equilibrium all the charges are in stable equilibrium

23 A solid conducting sphere of radius a has a net positive charge 2Q A conducting spherical shell of inner radius b and outer radius c is concentric with the solid sphere and has a net charge Q The surface charge density on the inner and outer surfaces of the spherical shell will be a c 0 2Q Q 2 4 b 4 c Q 4TC 2 C b Q Q 2 4 b 4 c 2 d None of these b

5 A beam of cathode rays is subjected to crossed electric E and magnetic fields B The fields are adjusted such that the beam is not deflected The specific charge of the cathode rays is given by CBSE AIPMT 2010 SAMB a 2VE 2 VB E c b 2VE B d E 2VB

In the circuit shown in figure the transistor used ha a current gain 100 What should be the bia resistor Rg so that V 5V necglect VBE CE RB B 1 2 10 a 3 1 x 1006 2 1 kQ C E VCE 10 V 5V 20 2 200 10 4 500 Q LB MORD

A point charge is brought in an electric field The electric field at a nearby point a will increase if the charge is positive b will decrease if the charge is negative c may increase if the charge is positive d may decrease if the charge is negative

the circuit shown below is X wwwwwww 50 2 50 2 1 10 volt JEE FOU akash Edaten wwwwww 30 52 Y 10 52 2 92 80 volt points x and y in VA 2 20 volt 4 40 volt

For the circuit shown in figure the potential difference between points a and b is 2V 1 2 4 V 3 2 V 102 www 192 www www 192 452 T4V b ww 12 2V 2 2 8 V 4 3 2 V