Q27. _______ is a device which makes use of mutual induction for stepping up or down an alternating e.m.f. Physics — Magnetism and Electromagnetic Induction Past Paper — Question 27 of 591A. Sonometer B. Transformer C. Ammeter D. Voltmeter E. Potentiometer Practice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →