84) In a small workshop 5 A energy meter is connected through a CT. The meter reader recorded 1000 units for a particular month but, the meter shows only 25 units. What is the current in primary of CT when a current of 4 A is flowing through the meter ?

85) The standard rated value of secondary current of current transformer as per IS 2705 (part I) -1981 shall be either :

86) The standard values of rated secondary current of the current transformer is

87) The rated secondary voltage of a single phase potential transformer is :

88) In which material, core of the transformer is constructed ?