Physics Current Electricity

Two identical cells connected in series send 10 A  current through a 5 W resistor. When they are connected in parallel, they send 8 A current through same resistance. What is internal resistance of each cell?

In the shown circuit, current through 4 Ω resistor is

A parallel plate capacitor is charged and then charging battery is disconnected. If the plates are now pulled apart with insulated handles

Two identical cells connected in series send 10 A  current through a 5 W resistor. When they are connected in parallel, they send 8 A current through same resistance. What is internal resistance of each cell?

In the shown circuit, current through 4 Ω resistor is

An ideal engine whose efficiency is 40%, receives heat at 500 K. If required efficiency is 50%, then intake temperature for the same exhaust temperature is

Consider the circuit shown. Galvanometer resistance is 10 Wand current through galvanometer is 3 mA. Find the resistance of shunt.

If electric current passing through a conductor vanes with time as I = I₀ + βt, where I₀ = 20A,β = 3A/s, then find charge flow through conductor in first 10 sec.

A square loop of resistance 16 Wis connected with battery of 9 V and internal resistance of 1W. In steady state, find energy stored in capacitor of capacity c = 4 mF as shown (at steady state current divides. symmetrically)

Two cell one of emf 8 V, internal resistance 2 W and other of emf 2 V and internal resistance 4 W are connected as shown in figure.

Find potential difference (in V) across point AC.