$A$ car has a fresh storage battery of emf $12 \, V$ and internal resistance $2 \times 10^{-2} \, \Omega$. If the starter motor draws a current of $80 \, A$, then the terminal voltage when the starter is $ON$ is: (in $V$)

The ammeter reading in the following circuit will be .............. $A$.

When a constant voltage is applied across the ends of a metallic wire,the heat produced in the wire will be doubled if:

Four resistances $10 \ \Omega$,$5 \ \Omega$,$7 \ \Omega$ and $3 \ \Omega$ are connected to form the sides of a rectangle $AB$,$BC$,$CD$,and $DA$ respectively. Another resistance of $10 \ \Omega$ is connected across the diagonal $AC$. The equivalent resistance between $A$ and $B$ is ............. $\Omega$.

Two bulbs rated $25 \ W - 220 \ V$ and $100 \ W - 220 \ V$ are connected in series to a $440 \ V$ supply. Which of the following happens?

$A$ $100\, V$ voltmeter of internal resistance $20\, k\Omega$ in series with a high resistance $R$ is connected to a $110\, V$ line. The voltmeter reads $5\, V$. The value of $R$ is ................ $k\Omega$.