Question based on terminal PD across a cell #!#Power dissipated through a resistor

Power dissipated in 4 Omega resistor is :

The power dissipated 6 Omega resistor is

Three equal resistors connected in series across a source emf together dissipate 4 watt.If the same resistors are connected in parallel across the same emf the power dissipate will be

A current of 3 A flows through the 2 Omega resistor as shown in the circuit. The power dissipated in the 5 Omega resistor is

Find out the folowing in the electric circuit given in (Fig. (a) Effective resistance of two 8 Omega resistors in the combination (b) Current flowing through 4 Omega resistor ( c) Potential difference across 4 Omega resistance (d) Power dissipated in 4 Omega resistor (e) Difference in ammeter readings, if any. .