Physics-
General
Easy
Question
In a black box of unkown elements (L, C or R or any other combination) an AC voltage 
is applied and current in the circuit was found to be 
Then the unknown elements in the box may be
- only capacitor
- both inductor and resistor
- either capacitor, resistor and inductor or only capacitor and resistor
- only resistor
The correct answer is: either capacitor, resistor and inductor or only capacitor and resistor
Related Questions to study
physics-
In the circuit shown, a 30V d.c source gives a current 2.0 A as recorded in the ammeter A and 30V a.c source of frequency 100Hz gives a current 1.2A The inductive reactance is
In the circuit shown, a 30V d.c source gives a current 2.0 A as recorded in the ammeter A and 30V a.c source of frequency 100Hz gives a current 1.2A The inductive reactance is
physics-General
physics-
Assertion (A): The average value of 
is zero
Reason (R): The average value of function (t) over a period T is 
Assertion (A): The average value of is zero
Reason (R): The average value of function (t) over a period T is
physics-General
physics-
curved surface of radius R separates two medium of refractive indices and as shown in figures A and B
Choose the correct statement (s) related to the real image formed by the abject o placed at a distance x, as shown in figure A
curved surface of radius R separates two medium of refractive indices and as shown in figures A and B
Choose the correct statement (s) related to the real image formed by the abject o placed at a distance x, as shown in figure A
physics-General
physics-
Two refracting media are separated by a spherical interface as shown in the figure. 
is the principal axis, 
and 
are the refractive indices of medium of incidence and medium of refraction respectively. Then :
Two refracting media are separated by a spherical interface as shown in the figure. is the principal axis, and are the refractive indices of medium of incidence and medium of refraction respectively. Then :
physics-General
physics-
In the figure shown a point object O is placed in air on the principal axis. The radius of curvature of the spherical surface is 60 cm is the final image formed after all the refractions and reflections.
In the figure shown a point object O is placed in air on the principal axis. The radius of curvature of the spherical surface is 60 cm is the final image formed after all the refractions and reflections.
physics-General
physics-
In the diagram shown, a ray of light is incident on the interface between 1 and 2 at angle slightly greater than critical angle. The light suffers total internal reflection at this interface. After that the light ray falls at the interface of 1 and 3, and again it suffers total internal reflection. Which of the following relations should hold true?
In the diagram shown, a ray of light is incident on the interface between 1 and 2 at angle slightly greater than critical angle. The light suffers total internal reflection at this interface. After that the light ray falls at the interface of 1 and 3, and again it suffers total internal reflection. Which of the following relations should hold true?
physics-General
physics-
The figure shows a ray incident at an angle 
. If the plot drawn shown the variation of 
versus 
(r= angle of refraction)
The figure shows a ray incident at an angle . If the plot drawn shown the variation of versus (r= angle of refraction)
physics-General
physics-
A ray of light in a liquid of refractive index 1.4, approaches the boundary surface between the liquid and air at an angle of incidence whose sine is 0.8. Which of the following statements is correct about the behaviour of the light
A ray of light in a liquid of refractive index 1.4, approaches the boundary surface between the liquid and air at an angle of incidence whose sine is 0.8. Which of the following statements is correct about the behaviour of the light
physics-General
physics-
The magnetic field between the plates of a capacitor when 
is given by
The magnetic field between the plates of a capacitor when is given by
physics-General
maths-
Total number of 4 digit number that are greater than 3000, that can be formed using the digits 1, 2, 3, 4, 5, 6 (no digit is being repeated in any number) is equal to:
Total number of 4 digit number that are greater than 3000, that can be formed using the digits 1, 2, 3, 4, 5, 6 (no digit is being repeated in any number) is equal to:
maths-General
maths-
If the line x + y = 1 touches the parabola 
, then the co-ordinates of the point of contact are
If the line x + y = 1 touches the parabola , then the co-ordinates of the point of contact are
maths-General
maths-
The mean of following frequency table is 50
The missing frequencies are :
The mean of following frequency table is 50
The missing frequencies are :
maths-General
chemistry-
Which of the following is not the resonance contributor for phenoxide ion -
Which of the following is not the resonance contributor for phenoxide ion -
chemistry-General
chemistry-
What is the correct increasing order of bond lengths of the bonds indicated as I, II, III and IV in following compounds -
What is the correct increasing order of bond lengths of the bonds indicated as I, II, III and IV in following compounds -
chemistry-General
chemistry-
Which one of the carbanions is most stable?
Which one of the carbanions is most stable?
chemistry-General
