Electricity and Magnetism Answers

Two point charges q1=4uc& q2=9uc are placed 20cm apart.the electric field due to them will be zero on the line joining them at a distance of

emmitor and collector plates are saprated by 10cm are connected through an ammeter without any cell. work function of emmitor is 2.39ev and light on at a wavelength is 400 find the minimum value of megnetic field which current registered by ameter is zero

A charged particle A exerts a force of 2.62 N to the right on charged particle B when the particles are 1.37mm apart. Particle B move straight away from A to make the distance between them 17.7mm. What vector force does particle B then exert on A.

Two small spheres of each charge 'q' mass 'm and material density 'd' suspended from a fixed point with the help of inextensible light thread.When the spheres are in air the angle between the threads is 90°. When the spheres are suspended in a liquid of density 2d/3 the angle between the threads is 60°. The value of dielectric constant of the liquid is

Two capacitors are connected in series c1=1f , v1=10v and c2=3f , v2= 20f find total voltage of the system 30 is not the answer


A hockey puck having a mass of 0.30 kg slides on the horizontal, frictionless surface of an ice rink. Two hockey sticks strike the puck simultaneously, exerting the forces on the puck shown in Figure below. The force F1 has a magnitude of 5.0 N, and the force F2 has a magnitude of 8.0 N. Determine both the magnitude and the direction of the puck’s acceleration

A particle starts from the origin at t = 0 with an initial velocity having an x component of 20 m/s and a y component of -15 m/s. The particle moves in the xy plane with an x component of acceleration only, given by ax = 4.0 m/s2. (a) Determine the components of the velocity vector at any time and the total velocity vector at any time. (b) Calculate the velocity and speed of the particle at t = 5.0 s. (c) Determine the x and y coordinates of the particle at any time t and the position vector at this time.

A commuter airplane takes the route shown in Figure 3.20. First, it flies from the origin of the coordinate system shown to city A, located 175 km in a direction 30.0° north of east. Next, it flies 153 km 20.0° west of north to city B. Finally, it flies 195 km due west to city C. Find the location of city C relative to the origin.

Each of two small spheres is charged positively, the total charge 52.6 micro C. Each sphere repelled from the other with force of 1.19 N. when the spheres are 1.94 m apart. Calculate the charge on each sphere.

A ball of mass m1 and a block of mass m2 are attached by a lightweight cord that passes
over a frictionless pulley of negligible mass, as in figure below. The block lies on a frictionless incline of
angle θ. Find the magnitude of the acceleration of the two objects and the tension in the cord.