Current Electri...

Which is the dimensional formula for condutance from the give below?

How would you arrange 48 cells each of e.m.f 2V and internal resistance 1.5Ω so as to pass maximum current through the external resistance of 2Ω ?

How many dry cells, each of emf 1.5V and internal resistance 0.5Ω, much be joined in series with a resistor of 20Ω to give a current of 0.6A in the circuit ?

Two electirc bulbs whose resistances are in the ratio of 1:2 are connected in parallel to a constant voltage source the power dissipated in them have the ratio.

If the above two bulbs are connected in series, the power dissipatd in them have the ratio:

An electric kettle has two coils. when once of them is switched on, the water in the kettle boils in 6 minutes. When the other coil is switched on, the water boils in 3 minutes If the two coils are connected in series the time taken to boil water in the kettle is:

An electric kettle has two coils when one of these is switched on. the water in the kettle boils in 6 minutes. When the other coil is switched on, boils in 3 minutes If the two coils are connected in parallel, the time taken to boil water in the kettle is.

The potential difference between the terminals of a battery is 10V and internal resistance 1Ω drops to 8V when connected across an external resistor find the resistance of the external resistor.

Two heater wires of equal length are first connected in series and then in parallel The ratio of heat produced in the two cases is....