Electric Circuits Answers

1. A bulb drawn 0.4 A current from a 3 V battery in 6.5 minutes. Calculate the

(a) number of charge that flows in the circuit.

(b) resistance of the bulb filament.

(c) energy dissipated in the bulb.

A resistance of 12 ohms an Inductance of 0.15 Henry and a capacitance of 130 f are connected in series across a supply of 200 volts 50 He. Calculate the 1.impedenace 2.the current 3.powerfactor 4.phase angle between voltage and current and 5.powerconsumed

A certain class of lamp takes 0.45A at 220V. How many such lamps can be run for an expenditure of power equal to 1 1/3 horsepower?

Calculate the capacitance of a capacitor whose plates are 25cm x 4.0 cm and are separated by a 2.0mm air gap.

The decomposition of dinitrogen pentoxide at 45°c takes place according to the equation .

N2O5=2NO2+1/2O2

Explain the effect of increasing the temperature of a reaction on the rate of the reaction .

Define rhe term dielectric constant and explain why water is not suitable as a delectric

Two capacitor of capacitance C1 and C2 connected in series are joined to two other capacitors of capacitance of capacitances C3 and C4, which are connected in parallel .determine the equivalent capacitance of the circuit .

At one corner of a 3cm by 4cm rectangle is placed a charge of -20pc and at the two adjacent corner are charge of 10pc .calculate the potential at the fourth corner.

A normal hydrogen atom consist of a proton nucleus and oribital electron , each carrying a charge (e).assuming that the electron orbit is circular and the seperation between the particles is 5.3×10^-11m.find

(I) the force of electrical attraction between the particles

(II) the electron oribital speed