Losses and Efficiency of Transformer MCQ
Q1. Which of the following losses in a transformer remains constant from no-load to full-load?…
Q1. Which of the following losses in a transformer remains constant from no-load to full-load?…
Q1. Why is a transformer rated in kVA instead of kW? A. Core loss depends on load B. Copper …
Q1. The approximate voltage drop in a transformer at lagging power factor is: A. I₂R₀₂ sinφ +…
Q1. The equivalent resistance of a transformer referred to the primary side is: A. R 1 + K²R…
Q1. The r.m.s. value of induced emf per turn in a transformer is: A. 2.22 f Φ m B. 4 f Φ m …
Q1. A transformer works on the principle of: A. Self-induction B. Mutual induction C. Stati…
Q1. Why is a starter necessary for a DC shunt motor? A. To increase back EMF B. To increase …
Q1. Electric braking in DC motors is preferred over mechanical braking because: A. It is chea…
Q1. Speed of DC motor is given by: A. N ∝ Ï• B. N ∝ I a C. N ∝ E b /Ï• D. N ∝ Ï•/E b Correct…
Q1. Performance curves of a DC motor show relation between: A. Speed vs flux B. Power factor…