Physics-
General
Easy
Question
The instantaneous values of current and voltage in an ac circuit are 
and 
respectively. If the resistance is 1 
then the reactance of the circuit will be
S
S
The correct answer is:
V0 = i0Z Þ 200 = 100 Z Þ Z = 2W
Also 
Þ 
Þ 
Related Questions to study
Physics-
An oxide coated filament is useful in vacuum tubes because essentially
An oxide coated filament is useful in vacuum tubes because essentially
Physics-General
Physics-
In an electron gun the control grid is given a negative potential relative to cathode in order to
In an electron gun the control grid is given a negative potential relative to cathode in order to
Physics-General
Physics-
In Millikan's experiment for the determination of the charge on the electron, the reason for using the oil is
In Millikan's experiment for the determination of the charge on the electron, the reason for using the oil is
Physics-General
Physics-
If A and B are identical bulbs which bulbs glows brighter
If A and B are identical bulbs which bulbs glows brighter
Physics-General
Physics-
Following figure shows an ac generator connected to a "block box" through a pair of terminals. The box contains possible R, L, C or their combination, whose elements and arrangements are not known to us. Measurements outside the box reveals that
e = 75 sin (sin 
t) volt, i = 1.5 sin ( t + 45o) amp then, the wrong statement is
Following figure shows an ac generator connected to a "block box" through a pair of terminals. The box contains possible R, L, C or their combination, whose elements and arrangements are not known to us. Measurements outside the box reveals that
e = 75 sin (sin t) volt, i = 1.5 sin ( t + 45o) amp then, the wrong statement is
Physics-General
Physics-
Which of the following plots may represent the reactance of a series LC combination
Which of the following plots may represent the reactance of a series LC combination
Physics-General
Physics-
The graphs given below depict the dependence of two reactive impedances X1 and X2 on the frequency of the alternating e.m.f. applied individually to them. We can then say that
The graphs given below depict the dependence of two reactive impedances X1 and X2 on the frequency of the alternating e.m.f. applied individually to them. We can then say that
Physics-General
Physics-
The resonance point in 
and 
curves is
The resonance point in and curves is
Physics-General
Physics-
The vector diagram of current and voltage for a circuit is as shown. The components of the circuit will be
The vector diagram of current and voltage for a circuit is as shown. The components of the circuit will be
Physics-General
Physics-
The voltage across a pure inductor is represented by the following diagram. Which one of the following diagrams will represent the current
The voltage across a pure inductor is represented by the following diagram. Which one of the following diagrams will represent the current
Physics-General
Physics-
Two sinusoidal voltages of the same frequency are shown in the diagram. What is the frequency, and the phase relationship between the voltages
Frequency in Hz Phase lead of N over M in radians</span
Two sinusoidal voltages of the same frequency are shown in the diagram. What is the frequency, and the phase relationship between the voltages
Frequency in Hz Phase lead of N over M in radians</span
Physics-General
Physics-
When an ac source of e.m.f. 
is connected across a circuit, the phase difference between the e.m.f. e and the current i in the circuit is observed to be 
, as shown in the diagram. If the circuit consists possibly only of RC or LC in series, find the relationship between the two elements [IIT-JEE (Screening) 2003]
When an ac source of e.m.f. is connected across a circuit, the phase difference between the e.m.f. e and the current i in the circuit is observed to be , as shown in the diagram. If the circuit consists possibly only of RC or LC in series, find the relationship between the two elements [IIT-JEE (Screening) 2003]
Physics-General
Physics-
The current 'i' in an inductance coil varies with time 't' according to following graph
Which one of the following plots shows the variations of voltage in the coil
The current 'i' in an inductance coil varies with time 't' according to following graph
Which one of the following plots shows the variations of voltage in the coil
Physics-General
Physics-
The output current versus time curve of a rectifier is shown in the figure. The average value of output current in this case is
The output current versus time curve of a rectifier is shown in the figure. The average value of output current in this case is
Physics-General
Physics-
A constant voltage at different frequencies is applied across a capacitance C as shown in the figure. Which of the following graphs
Correctly depicts the variation of current with frequency ?
A constant voltage at different frequencies is applied across a capacitance C as shown in the figure. Which of the following graphs
Correctly depicts the variation of current with frequency ?
Physics-General
