Electric Circuits Answers

two cells of emf 1.5v and 2v and internal resistance 1 ohm and 2 ohm respectively are connected in parallel so as to send same current in the same direction through an external resistance of 5 ohm .calculate current in each branch

What is the work done in moving a positive charge 2.1x103c across two points 4cm apart 1/4rE0 =9x109

The power in an electrical circuit is given by the equation P = I2R, where I is the current flowing through the circuit and R is the resistance of the circuit. What is the current in a circuit that has a resistance of 100 ohms and a power of 15 watts?

if 4a current is flowing in a resistor r power dissipated is p1. the resistor is cut into 4 equal pieces and power dissipated is p2. the ratio of p2:p1 is

Correct meaning of potential difference or voltage?

An electric dipole is placed in a uniform electric field of magnitude 5x10^4N/C with its dipole moment 4x10^-9Cm parallel to the field. Find the work done in turning the dipole till its dipole moment points in the direction opposite to the electric field.

a resistance of 400 ohm and 600 ohm are connected in series with 6 volt battery of negligible internal resistance.A voltmeter of resisitance 10000 ohm is used to measure the potential difference across 400 ohm.the error in the measurement of potential difference in volts aprroximately is
1)0.01
2)0.05
3)0.02

In a certain city, electricity costs $0.13 per kW·h. What is the annual cost for electricity to power a lamp-post for 5.50 hours per day with (a) a 100.-watt incandescent light bulb (b) an energy efficient 25-watt fluorescent bulb that produces the same amount of light? Assume 1 year = 365 days.