COMEDK 2025 Afternoon Shift | Alternating Current Question 1 | Physics

The ratio of the number of turns of the primary coil to the secondary coil of an ideal transformer is $5: 1$. The primary is connected to 220 V supply. What is the output power of the transformer if the output resistance is $11 \Omega$ ?

1760 W

1100 W

176 W

100 W

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

In which of the following circuit do we find the current and voltage in phase?

A purely resistive circuit

A circuit in which an inductor and a capacitor are in series.

A purely Inductive circuit

A purely capacitive circuit

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

What should be the value of the inductance of the coil which is to be connected to 220 V , 50 Hz supply so that maximum current of $3 \sqrt{2} A$ flows through the circuit ?

$L=\left(\frac{22}{15}\right) H$

$L=\left(\frac{15}{11 \pi}\right) H$

$L=\left(\frac{11}{15 \pi}\right) H$

$L=\left(\frac{22}{15} \sqrt{2}\right) H$

COMEDK 2025 Morning Shift

MCQ (Single Correct Answer)

-0

An ideal inductor is connected across a capacitor. Oscillations of energy $K$ are set up in the circuit. The capacitor plates are slowly drawn apart such that the frequency of oscillations is quadrupled. The work done in the process is

15K

13K

zero

COMEDK Subjects