Q.26 Identify whether the given statements with reference to DC machines are true or false. 1. Swinburne’s test cannot be performed on a DC series motor.2. Swinburne’s test is a non-loading test.Ans 1. 1-False, 2-True2. 1-True, 2-True3. 1-False, ...

Q.11 Which of the following types of instruments is used for the standardisation of polar-type AC potentiometer?Ans 1. A dynamometer instrument2. A thermal instrument3. A moving coil instrument4. An electrostatic instrumentCorrect Ans: 2

Q.25Ans 1. 02. 23. 44. 1Correct Ans: 2

Q.24 Read the given information and solve the question given at the end. D, E, F, G, H, I, J and K are eight friends sitting around a circular table by facing its centre. H is third to the ...

Q.21 Four letter-cluster have been given, out of which three are alike in some manner and one is different. Select the one that is different.Ans 1. ROYM2. HEOC3. PMXJ4. XUESCorrect Ans: 3

Q.58 A 20 mH coil is coupled with a coil of 5 mH. What could be the maximum possible value of mutual inductance?Ans 1. 10 mH2. 20 mH3. 15 mH4. 5 mHCorrect Ans: 1

Q.12 Which of the following methods of speed control CANNOT be used for squirrel cage induction motor?Ans 1. Slip power recovery control2. Stator voltage and stator frequency control3. Stator frequency control4. Stator voltage controlCorrect Ans: 1

Q.14 The peak reverse recovery current of a power diode depends on _________.Ans 1. rate of current flow and storage charge2. peak inverse voltage3. temperature4. storage chargeCorrect Ans: 1

Q.27 In a potentiometer circuit, a cell of 1.5 V EMF gives balance point at 30 cm length of wire. If another cell of 2.5 V EMF replaces the first cell, then at what length of the wire ...

Q.62 The equipotential surfaces in the potential field of a point charge are ______ centred at the point charge.Ans 1. circles2. cones3. spheres4. squaresCorrect Ans: 3