A `20 Omega` wire is used to supply current in a'circuit. If 5000V be the potential difference and 50k ‘W’ be the power supplied, then What is the potential difference?

Define-electric current what is the S.I. unit of potential difference?

A generator supplied power to a factory through cables of total resistance 20Ω. The potential difference at the generator is 5kV and the power output is 50kW. The potential difference of the supply mains at the factory is-

Three resistance of magnitudes 20Omega,30Omega and 40Omega are connected in series.(i) What is the equivalent resistance? (ii) IF the potential difference across the resistance 20Omega is 1V, calculate the potential differences across the other two resistances and also the total potential difference across the combination.

Two resistances 1 Omega and 2 Omega are connected in series and a potential difference of 6V is applied across the ends of this combination. What will be the terminal potential difference across the second resistance?

An ac source is connected in series with an inductor of 5H and a resistor of 1000Omega . The rms value of voltage of the source is 100 V and the frequency of the source is 50cps. What is the rms value of the current in the circuit? What is the phase difference of the voltage and the current in the circuit? What is the power dissipated in the circuit?

A factory requires a power of 90 kW. The energy is tranmitted to the factory through a 2.5Omega line wire .If 10 % of the power generated is lost in transmission , calculate The trasmission line current the potential difference at the power genrating station the potential drop due to line resistance .

A cell of emf 2.1 V and 0.1 Omega internal resistance sends 100 mA current in an external circuit. Determine the external resistance,terminal potential difference across that resistance and internal potential drop of the cell.

An alternating voltage 5V of frequency 50 Hz is connected to a series LCR circuit. The potential difference across the inductor and resistor are 6V and 4V respectively. What is the voltage across the capacitor (in V)?