A man is given a shock with 220 volt d.c. and thereafter with 220 volt (r.m.s.) a.c. will he feel the same intensity of shock in the two cases? Give reasons in support of your answer.

An air cored coil L and a bulb B are connected in series to the a.c. mains as shown in the given figures SAQ. 41: The bulb glows with some brightness. Now will the glow of the bulb change if an iron rod is insertd in the coil? Give reasons in support of your answer.

A diode is connected to 220V (r.m.s) a.c. in series with a capacitor as shown in the figure. What is the voltage V across the capacitor is

An electric lamp, which runs at 100 volt d.c. and 10 ampere current, is to be run on 220 volt - 50 cycles a.c. mains. Calculate the inductance of the required choke coil.

The r.m.s value of a.c. is 220 V. Nearly the peak value of a.c. is.

A 110 V d.c. heater is used on an a.c. source, such that the heat produced is the same. What would be the r.m.s. value of the alternating voltage?

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if assertion is true, but reason if false, (D) if both assertion and reason are false Assertion : An alternating voltage of 220V is more dangerous than a d.c. supply of 220 V. Reason : The peak value of 220V a.c. is about 311 V.

When an electric device X is connected to a 220 volt, 50 hertz a.c. supply, the current is 0.5 amp, and is in same phase as the applied voltage. When another device Y is connected to the same supply, the electric current is again 0.5amp, but it leads the potential difference by pi//2 . When X and Y are connected in serices across the same source, what will be the current ?

Direction. In the following questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if assertion is true, but reason if false, (D) if both assertion and reason are false Assertion : Faraday's law are consequence of the conservation of energy Reason : In a purely resistive a.c. circuit, the current lags behind the e.m.f. in phase

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false Assertion : A cirlar wire has resistane R. Then its resistance between two diametrically opposite points will be R/4 . Reason : The two semicircular portions, each having resistance R/2, form a parallel combination

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false Assertion : There are two values of angular frequency symmetrical about resonant angular frequency, for which same current can fow in an LCR-circuit. Reason : The two angular frequencies are given by omega _1 = 1 //sqrt(LC) and omega_2 = sqrt(LC)