Electric Circuits Answers

a spherical capacitor has an inner sphere radius 10cm and an outer sphere of radius 14cm. the outer sphere is earthed and the onner sphere is given a charge of 2.5

 . the space between the concentric spheres is filled with a liquid of dielectric constant 32. determine the capacitamce of the capacitor.

If 0.81 N is force of repulsion between two identical charges separated by a distance 0.1 m apart. The value of each charge in C will be

Calculate the resonance frequency of a circuit capacitive reactance value of a 310nF capacitor and inductive reactance value of a 2m Ω inductance.

When the switch is open, the potential difference across the terminals of a battery is 20.0 V. When a current of 2.0 A flows, the potential difference across the battery drops to 16 V. (a) If this battery consists of two identical cells in series, what is the electromotive force of each cell? (b) If this battery consists of two identical cells in series, what is the internal resistance of each cell? (c) If this battery consists of two identical cells in parallel, what is the electromotive force of each cell? (d) If this battery consists of two identical cells in parallel, what is the internal resistance of each cell?

Three charges are at the corners of an equilateral triangle with sides 9m. What is the potential energy of these charges.( q1 = q2 = 4×10^(-4)C and q3 = -3×10^(-4)C and K=9×10⁹ )

Suppose the magnetic field changes uniformly from 0.500T to 0.200 T in the next 0.600s. Compute (a) the induced emf in the coil and (b) the magnitude and direction of the induced current.