Consider the circuit shown in the figure Q1.1,

\text { If the battery is } 10 \mathrm{~V} \text { and the resistors are } R_{1}=R_{2}=4 \Omega \text {, and } R_{3}=2 \Omega \text {, calculate } (a)the total resistance of the circuit across the battery terminals, (b)the total current supplied by the voltage source, (c)the voltage at point P, (d)the current through R₁, (e)the current through R₂" (f)the current through R3. ) Let the currents through R₁, R₂, R3 be respectively 1₁, 12, 13 produced by the battery of an unknown voltage value. If the voltage of the battery is doubled, what would be changes in the voltage at point P, in the total resistance, in the total current, and in currents 1₁, 12, 13?