Electricity and Magnetism Answers

State, giving reasons, whether the following statements are True or False:

(1)Magnetisation of a paramagnetic material attains a saturation value at very low

temperatures and high magnetic fields.

State, giving reasons, whether the following statements are True or False:

(1) Gauss’s law for magnetism suggests that magnetic monopoles exist.

State, giving reasons, whether the following statements are True or False:

(1) An electron moves in a magnetic field of 1T with velocity 5.0 × 10^5

ms^–1

in the direction of

the magnetic field. The magnitude of the force experienced by the electron is 9.5 × 10^–14N.

State, giving reasons, whether the following statements are True or False:

(1) When a dielectric material is inserted between the parallel plates of a capacitor, the

electrostatic energy stored between the plates increases.

State, giving reasons, whether the following statements are True or False:

(1) In polar molecules, dipole moment exists even in the absence of an external electric field.

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