ISRO 2023 Quiz 6

A 3-phase balanced supply system is connected to a 3-phase unbalanced load. Power supplied to this load can be measured using:

1. two wattmeters

2. one wattmeter

3. three wattmeters

Which of these statements is/are correct?

In case of the Wheatstone bridge shown in the below circuit diagram  and. The null value for the galvanometer is obtained when . Find the value of R and the resistance measurement range of the bridge if 'S' value varies from  to

A weight of 2.8 mg is used as the controlling weight is a gravity-controlled instrument. The deflecting torque corresponding to a deflection of 60° is 3. Find the distance from axis of rotation.

Find the % accuracy of the ammeter when it is desired to measure the value of current is the 250 Ω resistor as shown in the figure. (Internal resistance of the ammeter is (5 Ω).

A palindrome is a word that reads the same forwards and backwards. In a game of words, a player has the following two plates painted with letters.

From the additional plates given in the options, which one of the combinations of additional plates would allow the player to construct a five-letter palindrome.

The player should use all the five plates exactly once. The plates can be rotated in their plane.