Physics-
General
Easy
Question
An inductor L, a resistance R and two identical bulbs B1 and B2 are connected to a battery through a switch S as shown in the figure. The resistance of coil having inductance L is also R. Which of the following statement gives the correct description of the happenings when the switch S is closed?
- The bulb lights up earlier than and finally both the bulbs shine equally bright.
- light up earlier and finally both the bulbs acquire equal brightness.
- lights up earlier and finally shines brighter than
- light up together with equal brightness all the time.
The correct answer is: The bulb lights up earlier than and finally both the bulbs shine equally bright.
Related Questions to study
physics-
A circuit element is placed in a closed box. At time t=0, constant current generator supplying a current of 1 amp, is connected across the box. Potential difference across the box varies according to graph shown in figure. The element in the box is :
A circuit element is placed in a closed box. At time t=0, constant current generator supplying a current of 1 amp, is connected across the box. Potential difference across the box varies according to graph shown in figure. The element in the box is :
physics-General
physics-
A conducting rod PQ of length L = 1.0 m is moving with a uniform speed v = 20 m/s in a uniform magnetic field B = 4.0 T directed into the paper. A capacitor of capacity C = 10 is connected as shown in figure. Then
A conducting rod PQ of length L = 1.0 m is moving with a uniform speed v = 20 m/s in a uniform magnetic field B = 4.0 T directed into the paper. A capacitor of capacity C = 10 is connected as shown in figure. Then
physics-General
physics-
Two circular coils A and B are facing each other as shown in figure. The current i through A can be altered
Two circular coils A and B are facing each other as shown in figure. The current i through A can be altered
physics-General
physics-
A conducting wire frame is placed in a magnetic field which is directed into the paper. The magnetic field is increasing at a constant rate. The directions of induced currents in wires AB and CD are
A conducting wire frame is placed in a magnetic field which is directed into the paper. The magnetic field is increasing at a constant rate. The directions of induced currents in wires AB and CD are
physics-General
physics-
In the shown AC circuit phase different between currents
In the shown AC circuit phase different between currents
physics-General
physics-
The current I, potential difference across the inductor and potential difference across the capacitor in circuit as shown in the figure are best represented vectorially as
The current I, potential difference across the inductor and potential difference across the capacitor in circuit as shown in the figure are best represented vectorially as
physics-General
physics-
are the respective r.m.s. values of the time varying currents as shown in the four cases I, II, III and IV. Then identify the correct relations.
are the respective r.m.s. values of the time varying currents as shown in the four cases I, II, III and IV. Then identify the correct relations.
physics-General
physics-
In the circuit diagram shown, and R = 100 . The effective current through the source is
In the circuit diagram shown, and R = 100 . The effective current through the source is
physics-General
physics-
The effective value of current is:
The effective value of current is:
physics-General
physics-
The direct current which would give the same heating effect in an equal constant resistance as the current shown in figure, i.e. the r.m.s. current, is
The direct current which would give the same heating effect in an equal constant resistance as the current shown in figure, i.e. the r.m.s. current, is
physics-General
physics-
The given figure represents the phasor diagram of a series LCR circuit connected to an ac source. At the instant t¢ when the source voltage is given by the current in the circuit will be
The given figure represents the phasor diagram of a series LCR circuit connected to an ac source. At the instant t¢ when the source voltage is given by the current in the circuit will be
physics-General
physics-
In a series CR circuit shown in figure, the applied voltage is 10 V and the voltage across capacitor is found to be 8V. Then the voltage across R, and the phase difference between current and the applied voltage will respectively be
In a series CR circuit shown in figure, the applied voltage is 10 V and the voltage across capacitor is found to be 8V. Then the voltage across R, and the phase difference between current and the applied voltage will respectively be
physics-General
physics-
In the circuit shown if the emf of source at an instant is 5 V, the potential difference across capacitor at the same instant is 4 V. The potential difference across R at that instant may be
In the circuit shown if the emf of source at an instant is 5 V, the potential difference across capacitor at the same instant is 4 V. The potential difference across R at that instant may be
physics-General
physics-
An inductive circuit contains resistance of 10 and an inductance of 2.0 H. If an AC voltage of 120 V and frequency 60 Hz is applied to this circuit, the current would be nearly:
An inductive circuit contains resistance of 10 and an inductance of 2.0 H. If an AC voltage of 120 V and frequency 60 Hz is applied to this circuit, the current would be nearly:
physics-General
physics-
In the circuit, as shown in the figure, if the value of R.M.S current is 2.2 ampere, the power factor of the box is
In the circuit, as shown in the figure, if the value of R.M.S current is 2.2 ampere, the power factor of the box is
physics-General