Electric Circuits Answers

1. A refrigerator and a rice cooker are connected in parallel to a 220 V line. The current in the refrigerator is 10 A and in the rice cooker is 4 A. Find the following;

(a) the resistance of each device

(b) the total resistance

(c) the current flowing in the line

find the potential gradient between two parallel plate conductor of separation 0.03 when potential difference of 540 supplied to them hence determine the force in an electron which club between the plates

a 200iC charge flows through conductor. if the p.d between its ends is 40mv, find the work done

A coil connected to a 220 V line is used to heat 500.0 g of water at 30°C. It is found out that after 5 minutes, the temperature of the water has risen to 80°C. What is the resistance of the coil? 

A coil connected to a 220 V line is used to heat 500.0 g of water at 30°C. It is found out that after 5 minutes, the temperature of the water has risen to 80°C. What is the resistance of the coil? 

A system is comprised with multiple bodies. These bodies hold some charges. The charges are q1, q2, q3 and q4 and the value charges are +5C, +10C, -2C, -15C respectively. Find out the net charge on the system.

The resistance of a uniform copper wire 50.0 meters long and 1.15mm in diameter is 0.830 ohms at 20°C. What is the resistivity if the copper at this temperature?

Two resistances, one 12 Ω and the other 18 Ω, are connected in parallel. What is the equivalent resistance of the parallel combination?

1. Three 7.20 resistors are connected in series. Illustrate a schematic diagram for the case. What is their equivalent resistance? Show your complete solution.

1. You connect a number of identical light bulbs to a flashlight battery. (a) What happens to the brightness of each bulb as more and more bulbs are added to the circuit if you connect them (i) in series and (ii) in parallel? (b) Will the battery last longer if the bulbs are in series or in parallel? Explain your reasoning.