Student Login

Home›Chapters›Alternating Current PYQs›AC Generator & Transformer›Question 51

NEET 2013 · AC Generator & Transformer

AC Generator & Transformer question from NEET 2013

Q51NEET 2013Easy

AC Generator & Transformer

The primary of a transformer when connected to a dc battery of 10 Volt draws a current of 1 mA. The number of turns of the primary and secondary windings are 50 and 100 respectively. The voltage in the secondary and the current drawn by the circuit in the secondary are respectively

Show answer and solution

Answer: (c)

A transformer works only on changing flux (mutual induction).
Steady dc in the primary gives constant flux, so $\dfrac{d\phi}{dt} = 0$ in the secondary.
Induced emf in the secondary is zero, so no secondary current.
So the answer is (c) zero volt and therefore no current.

Report a mistake

More questions on AC Generator & Transformer

A 220 volt input is supplied to a transformer. The output circuit draws a current of 2.0…NEET 2010 (AIPMT, Prelims)
A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main…NEET 2007 (AIPMT)
The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If…NEET 2007 (AIPMT)
In an AC generator, a coil with N turns, all of the same area A and total resistance R…JEE Main 2006 (AIEEE)
The core of a transformer is laminated becauseNEET 2006 (AIPMT)
The core of any transformer is laminated so as toJEE Main 2003 (AIEEE)
In a transformer, number of turns in the primary coil are 140 and that in the secondary…JEE Main 2002 (AIEEE)
A step-up transformer operates on a 230 V line and supplies current of 2 A to a load. The…NEET 1998 (AIPMT)