When two resistors of $R \ \Omega$ value are connected in parallel,what is the equivalent resistance?

The equivalent resistance of the given circuit between the terminals $A$ and $B$ is $....\Omega$

Two bulbs,one of $50\, W$ and another of $25\, W$,are connected in series to the mains. The ratio of the currents through them is:

The current $I$ in the network shown in the figure is .......... $A$.

Find the potential difference across the $24\,\Omega$ resistor in the given circuit. (in $,V$)

$A$ letter $A$ is constructed of a uniform wire with resistance $1.0\,\Omega/cm$. The sides of the letter are $20\,cm$ and the cross-piece in the middle is $10\,cm$ long. The apex angle is $60^\circ$. The resistance between the ends $A$ and $D$ is ............. $\Omega$.