A lamp in a circuit consissing of a coil of large number of turns and a battery does not light up to full brilliance instantly on switching on the circuit. Why?

A circuit consists of a coil, a switch and a battery, all in series. The internal resistance of the battery is negligible compared with that of the coil. The switch is originally open. It is thrown closed, after a time interval Deltat . The current in the circuit reaches 80.0% of its final value. The switch then remains closed for a time interval much longer than Deltat . The wires connected to the terminals of the battery are then short circuited with another wire and removed from the battery, so that the current is uninterrupted. At an instant that is a time interval Deltat . After the short circuit, the current is what percentage of its maximum value? a)20% b) 8% c) 4% d)10 %

A circuit consists of three identical lamps connected to a battery as shown in the figure. When the switch S is closed then the intensities of lamps A and B

In a transformer number of turns in primary circuit is 500 and in secondary circuit number of turns is 10 and load resistance to 10 Omega and voltage of secondary coil is 50 V then find the current in primary circuit .

A uniform wound solenoidal coil of self inductance 1.8xx10^(-4) henry and resistance 6 ohm is broken up into two identical coils. These identical coils are then connected in parallel across a 15-volt battery of negligible resistance. The time constant for the current in the circuit is.......seconds and the steady state current through the battery is ..............amperes.

A series circuit consists of three identical lamps connected to a battery as shown in Fig. 7.13 . when the switch S is closed, what happens (a) to the intensities of lamps A and B , (b) to the intensity of lamp C , ( c ) to the current in the circuit , and (d) to the voltage drop across the three lamps ? Does the power dissipated in the circuit increase, decrease, or remain the same ?

What is meant by electric circuit ? Why does electric current start flowing in a circuit the moment circuit is complete ? When do we say that the potential difference across a conductor in a circuit is 1 volt ? Calculate the potential difference between the two terminals of a battery if 12 joules of work is done in transferring 2 coulombs of charge.

Figure shows two capacitors of capacitance 2muF and 4muF and a cell of 90 V. The switch 'k' is such that when it is in position 1, the circuit ABCD is closed and when it is in position 2, the circuit BCEF is closed.the resistance of both the circuits is negligible os that the capacitor gets fully charged instantly. Initially the switch is in position1. then it is turned in position 2 and then in position 1. Now two cycles are completed. Find the charge ("in" mu C) after two cycles.

Two moving coil galvanometers 1 and 2 are with identical field magnets and suspension torque constants, but with coil of different number of turns N_(1) and N_(2) , area per turn A_(1) and A_(2) , and resistance R_(1) and R_(2) . When they are connected in series in the same circuit, they show deflections theta_(1) and theta_(2) . then theta_(1)//theta_(2) is

A 1 -k Omega resistor is connected in series with a 10-mH inductor, a 30 V battery and an open switch. At time t= 0 , the switch is suddenly closed. a. What is the maximum current in this circuit and when does it occur? b. What are the voltage drops across the inductor and across the resistor 20 mu s after the switch is closed? c. On a single set of axes, sketch the voltage across the resistor and the voltage across the inductor as functions of time. Also, sketch a graph of the current in the circuit as s function of time.

In a school-wide competition held at Saul C. Tigh memorial High school, Olympiad teams are challenged to come up with different circuits involving both real and imaginary currents, imaginary currents exists in spots where the electrical energy encounters zero resistance, such as through a coil or wire. Real currents exist only where the electrical energy headed through the circuit encounters resistance, such as when a light bulb "resists" the current and takes up some of the energy carried throughout the circuit. The members of team Charlie develop a circuit in which the total current, real and imaginary, can be measured at 50+12i amps. They then add the current together with the current produced by Team Delta's circuit, 40-9i amps. Finally, they decide to multiply the resulting current, in amps, by Team Epsilon's total current, 60-2i amps. What is the final current , in amps, after the entire process is completed?