A student while performing the experiment to find the resultant resistance of two resistors connected in series observed the ammeter pointer at position P when the key is 'off' and the same pointer at position Q when the key is 'on'.



The correct reading of ammeter is:
(1) 0.2 A
(2) 2.5 A
(3) 2.3 A
(4) 2.7 A

Q. While performing an experiment to determine the equivalent resistance of two resistors connected in parallel, a student observes the pointer of voltmeter at position X when the key is 'off' and the same pointer at position Y when the key is 'on'.



The correct voltmeter reading is :
(1) 0.2 V
(2) 2 V
(3) 2.2 V
(4) 1.8 V

Q. Choose the appropriate set of apparatus for performing the experiment to determine the equivalent resistance of two resistors when connected in series:
(1) Voltmeter, Ammeter, Two resistors, Key, Battery
(2) Ammeter, Two resistors, Key, Connecting wires, Rheostat, Battery
(3) Key, Rheostat, Voltmeter, Two resistors, Battery, Connecting wires
(4) Battery, Ammeter, Connecting wires, Rheostat, Voltmeter, Two resistors, Key

Q. A student is performing an experiment to verify Ohm's Law in the laboratory. The ammeter given to him for this purpose has 10 divisions between 0 and 0.5 A on its scale. If the pointer shows 22 divisions on the ammeter scale while taking a reading, what is the value of current according to this position of pointer?

Q. Four students measured the reading by observing the position of pointer on the ammeter scale as shown below:



Assuming that the ammeter has no zero error, the correct reading is :
(1) 1.25 A
(2) 1.30 A
(3) 1.15 A
(4) 1.1 A

Q. In the circuit shown, the variable resistance is so adjusted that the ammeter reading is same in both the position $1$ and $2$ of the key the reading of ammeter is $2\text{A}$. If $E=10\text{V}$ and internal resistance$=0,$ then find $x.$ (in ohm)