AIPMT 2012 Prelims | Alternating Current Question 42 | Physics

AIPMT 2012 Prelims

MCQ (Single Correct Answer)

-1

In an electrical circuit R, L, C and a.c. voltage source are all connected in series. When L is removed from the circuit, the phase difference between the voltage and the current in the circuit is If instead, C is removed from the circuit, the phase difference is again. The power factor of the circuit is

$${1 \over 2}$$

$${1 \over {\sqrt 2 }}$$

$${{\sqrt 3 } \over 2}$$

AIPMT 2011 Mains

MCQ (Single Correct Answer)

-1

A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz frequency. If an ac source, of 200 volt, 100 Hz, is connected across the coil, the current in the coil will be

2.0 A

4.0 A

8.0 A

$${{20} \over {\sqrt {13} }}A$$

AIPMT 2011 Mains

MCQ (Single Correct Answer)

-1

The r.m.s. value of potential difference V shown in the figure is

AIPMT 2011 Mains Physics - Alternating Current Question 47 English

$${{{V_0}} \over {\sqrt 3 }}$$

V₀

$${{{V_0}} \over {\sqrt 2 }}$$

$${{{V_0}} \over 2}$$

AIPMT 2011 Prelims

MCQ (Single Correct Answer)

-1

An ac voltage is applied to a resistance R and an inductor L in series. If R and the inductive reactance are both equal to 3 $$\Omega $$, the phase difference between the applied voltage and the current in the circuit is

$$\pi /6$$

$$\pi /4$$

$$\pi /2$$

zero

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