In the given circuit,the reading of the ammeter is ................. $A$ (assume internal resistance of the battery is zero).

In how much time will one litre of ${H_2}$ be collected by a $5\, A$ current? (Given: $Z = 1 \times {10^{ - 8}}\,kg/C$ and density of ${H_2} = 0.09\,kg/{m^3}$)

$A$ parallel combination of two resistors,of $1 \,\Omega$ each,is connected in series with a $1.5 \,\Omega$ resistor. The total combination is connected across a $10 \,V$ battery. The current flowing in the circuit is .............. $A$

In the given circuit,find the value of resistance $R$ if the current flowing through the circuit is $1 \, A$.

If a high power heater is connected to electric mains,then the bulbs in the house become dim,because there is a

Current flowing through the cell and potential difference between its two poles obtained by observations are given in the table below. The internal resistance of the cell is $r$.

Order	$V \ (V)$	$I \ (A)$
$1$	$1.0$	$0.08$
$2$	$0.5$	$0.18$
$3$	$0.8$	$0.12$

Find the $emf$ $(\varepsilon)$ of the cell used in the experiment. (in $V$)