Electricity and Magnetism Answers

If a house is supplied with 120 V, 100 A service, find the maximum power capability. 

1. Two point particles separated by 6 cm have charges q₁ = 14nC and q₂ = -23nC, respectively. What is the magnitude of the force that each exerts on each other?

2.Two charges q₁ and q₂ are separated by a distance 0.02mm in the air. The force between them is 100N. What will be the force between the q1 and q2 place 0.06mm apart in the air.

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Given a straight wire with a 1A current flowing on it. Calculate the magnetic field magnitude at a distance of 3mm from the

wire.

If a metal sphere A having positively charged is brought into contact with an uncharged 

metal sphere. As a result:

(a) both spheres are positively charged (b) A is positively charged and B is neutral

(c) A is positively charged and B is negatively charged (d) A is neutral and B is 

positively charged

 Two charged particles apply an electric force of 5.2×10 −3 N on each other. Distance between them gets twice as much as before. What will be Coulomb's force?

a) A wire loop of resistance 20 Omega and radius 5.0cm is kept in the plane of this paper in a changing uniform magnetic field vec B .The direction of vec B is perpendicular to the plane of the page and points out of it.If the magnitude of the induced current in the loop is 3.0mA determine the rate of change of the magnitude of the magnetic field bar(B) .

 Calculate the magnitudes of magnetic intensity vector H and magnetic field vector B at the

centre of a 2500-turn solenoid which is 0.50 m long and carries a current of 1.0 A.

(u_o= 4π x 10^-7Hm^-1)