Electricity and Magnetism Answers

A +200 uC charge is placed at the origin. A +400 uC charge is placed at 2m above the origin(y-axis), and a -600 uC charged is placed 3m to the right of the origin (x-axis). What is the magnitude and direction of the net force acting on the charge placed at the origin?

A 75.0 kW, 230-V shunt generator has a generated emf of 243.5 V. If the field current is 12.5 A at
rated output, what is the armature resistance? (Ans. 0.0399).

Briefly explain the theory and procedure for the experiment to determine Plank’s constant by
Photo electric apparatus. Also write down the concluding remarks.

The input voltage to a transformer is 24 V a.c. and the output voltage is 6.0 V. The input coil has 720 turns
How many turns are on the output coil?

Consider three charges, one of magnitude +2Q and other two have magnitude -Q. They are
placed in a constellation as depicted in the figure below. Find out the electric intensity at some
spherical point P(r, theta,

How the single particle motion is influenced by the applying the following fields:
• Uniform E and B field
• Gravitational field
• Non-uniform B field
• Non-uniform E field
• Time varying E field
• Time varying B field

Write a detailed concept-based summary?

A straight wire of mass 300g and length 25m and current of 35A.It is suspended in midair by a uniform horizontal magnetic field B.What is the magnitude of the magnetic field?

Which of the following factors does NOT affect the resistance of a metallic conductor at
constant temperature?
A. Type of the conductor.
B. Length of the conductor.
C. Surface area of the conductor.
D. Cross-sectional area of the conductor.