A non -conducting ring of radius 0.5m carries a total charge of 1.11 x 10-10 C distributed non-uniformly on its circumference producing on its circumference on the electric field. E everywhere is space.
The value of the line integral (l = 0 being centre of ring) in volts is
+2
-1
-2
zero
The turns of a solenoid, designed to provide a given magnetic flux density along its axis, are wound to fill the space between two concentric cylinders of fixed radii. How should the diameter d of the wire used be chosen so as to minimize the heat dissipated in the windings?
Wire should be multiple of 5d
Wire should be multiple of d/3
the wire is independent of d
Can't say
A long straight wire is carrying current I in the +z direction. The x-y plane contains a closed circular loop carrying current I2 and not encircling the straight wire. The force on the loop will be
zero
Depends on the distance of the centre of the loop from the wire.
D.
Depends on the distance of the centre of the loop from the wire.
The force depends on the distance of the centre of the loop from the wire.
A certain charge Q is divided into two parts q and Q-q. How the charge Q and q must be related so that when q and (Q-q) is placed at a certain distance apart experience maximum electrostatic repulsion?
Q = 2q
q = 3q
Q = 4q
Q= 4q + c
A charged particle 'q' is shot with speed v towards another fixed charged particle Q. It approaches Q upto the closest distance r and then returns. If q were given a speed 2v, the closest distance of approach would be
r
2r
r/2
r/4
Two identical conducting balls A and B have positive charges q1 and q2 respectively. But q1 ≠ q2. The balls are brought together so that they touch each other and then kept in their original positions. The force between them is
less than that before the balls touched
greater than that before the balls touched
same as that before the balls touched
zero
A positively charged ball hangs from a silk thread. we put a positive test charge qo at a point and measure F/qo, then it can be predicted that the electric field strength E
>F/qo
=F/q
<F/qo
Cannot be estimated
Capacitor C1 of capacitance 1μF and capacitor C2 of capacitance 2 μF are separately charged fully by a common battery. The two capacitors are then separately allowed to discharged through equal resistors at time t =0
the current in each of the two discharging circuits is zero at t = 0
the currents in the two discharging circuits at t= 0 are equal but non-zero
the currents in the two discharging circuits at t=0
Capacitor C1 loses 40% of its initial charge sooner than C2 loses 40% of the initial charge.
A uniform electric field and a uniform magnetic field acting along the same direction in a certain region. If an electron is projected along the direction of the fields with a certain velocity, then
It will turn towards the left of the direction of motion.
It will turn towards the right of the direction of motion
Its velocity will increase
Its velocity will decrease