Observation

       (a) Circuit diagram required to convert a galvanometer to ammeter and voltmeter       
(i)                                                                             (ii)                                                                                                      

                    
(b) Quantities that can be measured with cathode ray oscilloscope
-  Frequency
-  Period (Time)
-  Voltage (d.c.)/(a.c)
-  Wavelength
-  Current
-  Phase angle
The conversions of the galvanometer are as shown. Many candidates listed ‘resistance’ as one of the quantites that can be measured by CRO in (b) and only very new listed phase angle/difference.