A. hot because of heavy iron losses taking place in it due to high flux density
B. hot because primary will carry heavy current
C. cool as there is no secondary current
D. none of above will happen
Related Mcqs:
- The secondary of a current transformer is always short-circuited under operating conditions because it____________________?
A. avoids core saturation and high voltage induction
B. is safe to human beings
C. protects the primary circuit
D. none of the above - If R2 is the resistance of secondary winding of the transformer and K is the transformation ratio then the equivalent secondary resistance referred to primary will be___________?
A. R2/VK
B. R2IK2
C. R22!K2
D. R22/K - The purpose of providing an iron core in a transformer is to_____________?
A. provide support to windings
B. reduce hysteresis loss
C. decrease the reluctance of the magnetic path
D. reduce eddy current losses - The purpose of providing iron core in a step-up transformer is?
A. to provide coupling between primary and secondary
B. to increase the magnitude of mutual flux
C. to decrease the magnitude of mag-netizing current
D. to provide all above features - While conducting short-circuit test on a transformer the following side is short circuited?
A. High voltage side
B. Low voltage side
C. Primary side
D. Secondary side - In a transformer the resistance between its primary and secondary is____________?
A. zero
B. 1 ohm
C. 1000 ohms
D. infinite - In a transformer the resistance between its primary and secondary should be_____________?
A. zero
B. 10 Q
C. 1000 Q
D. infinity - An ideal transformer has infinite values of primary and secondary inductances. The statement is______________?
A. true
B. false - A transformer core is laminated to__________?
A. reduce hysteresis loss
B. reduce eddy current losses
C. reduce copper losses
D. reduce all above losses - Which of the following properties is not necessarily desirable for the material for transformer core ?
A. Low hysteresis loss
B. High permeability
C. High thermal conductivity
D. Adequate mechanical strength
