Tag: chemical effects of electric current

Filament of torch bulb is ?

An inductor coil stores $U$ when a current is passed through it and dissipates heat energy at the rate of $P .$ The time constant of the circuit when this connected across a battery of zero internal resistance is:

An electric circuit which starts from one terminal of a cell and ends at the other terminal of the cell without any break is called:

Five cells each of emf $\varepsilon $ and internal resistance r each are connected in series. If one cell is connected wrongly, then potential difference across this cell will be

State whether given statement is True or False
We use battery cell in our everyday life ?

A wire of length $L$ and $3$ identical cells of negligible internal resistances are connected in series. Due to the current, the temperature of the wire is raised by $\Delta\ T$ in a time $t$. A number $N$ of similar cells is now connected in series with a wire of the same material and cross-section but of length $2\ L$. The temperature of the wire is raised by the same amount $\Delta\ T$ in the same time. The value of $N$ is

Two cells of emf's $3V$ and $3V$ have internal resistances  $1.5\Omega\ &\ 1\Omega$ are connected in parallel across $3\Omega,$ such that they send the current through $3\Omega$ in same direction calculate the p.d. across $3\Omega$ resistor.

How many cells each marked ( 12V - A) should be connected  in mixed  grouping  so that it may be marked as ( 48 V- 18 A)  

Why the bulb brighter in a simple circuit that has more cells?

Two Leclanche cells assisting each other could be balanced on a length $L$ of a potentiometer wire. If the current through the wire is halved, what will be balancing length for one Leclanche cell?