The diagram shows a capacitor C and a resistor R connected in series to an ac source. V₁ and V₂ are voltmeters and A is an ammeter.

   

Consider now the following statements

I.	Readings in A and V2 are always in phase
II.	Reading in V1 is ahead in phase with reading in V2
III.	Readings in A and V1 are always in phase

Which of these statements is/are correct?

1.	I only	2.	II only
3.	I and II only	4.	II and III only

The figure shows the variation of R, X_L, and X_C with frequency f in a series of L, C, and R circuits. For which frequency point is the circuit inductive?

One 10 V, 60 W bulb is to be connected to 100 V line. The required induction coil has a self-inductance of value: (f = 50 Hz) 

1. 0.052 H

2. 2.42 H

3. 16.2 mH

4. 1.62 mH

In an LCR series network, ${\mathrm{V}}_{\mathrm{L}}=40$ $\mathrm{V},$ ${\mathrm{V}}_{\mathrm{C}}=20$ $\mathrm{V}$ $\mathrm{and}$ ${\mathrm{V}}_{\mathrm{R}}=15$ $\mathrm{V}$. The supply voltage will be:

1.  25 V

2.  75 V

3.  35 V

4.  Zero

In a step-up transformer, the turn ratio is 1:2 . A Leclanche cell (e.m.f. 1.5 V) is connected across the primary coil. What would be the voltage developed in the secondary coil?

A 220 V, 50 Hz ac source is connected to an inductance of 0.2 H and a resistance of 20 ohms in series. How much current flows across the circuit?

1.  10 A

2.  5 A

3.  33.3 A

4.  3.33 A

When a step-down transformer is connected to a 2400 volt line, the output load receives 80 amps of current. The ratio of the turns in the primary and secondary coils is 20:1. If transformer efficiency is 100%, then the current flowing in the primary coil will be:

A generator produces a voltage that is given by V = 240 sin 120 t, where t is in seconds. The frequency and r.m.s. voltage are:

In an ac circuit, the current is given by \(i=5\sin(100t-\frac{\pi}{2})\) and the ac potential is V = 200 sin(100t) volt. The power consumption is:

1. 20 W

2. 40 W

3. 1000 W

4. 0