Physics-
General
Easy
Question
An ac generator G with an adjustable frequency of oscillation is used in the circuit, as shown.
Current drawn from the ac source will be maximum if its angular frequency is –
The correct answer is:
Related Questions to study
physics-
Statement-1 : In a series R,L,C circuit if 
, 
, and 
denote rms voltage across R, L and C repectively and 
is the rms voltage across the source, then 
.
Statement-2 : In AC circuits, kirch off voltage law is correct at every instant of time.
Statement-1 : In a series R,L,C circuit if , , and denote rms voltage across R, L and C repectively and is the rms voltage across the source, then .
Statement-2 : In AC circuits, kirch off voltage law is correct at every instant of time.
physics-General
physics-
In the AC circuit shown below, the supply voltage has constant rms value V but variable frequency f. At resonance, the circuit :
In the AC circuit shown below, the supply voltage has constant rms value V but variable frequency f. At resonance, the circuit :
physics-General
physics-
In the circuit shown in figure, if both the bulbs 
and 
are identical :
In the circuit shown in figure, if both the bulbs and are identical :
physics-General
physics-
A resistor R, an inductor L, a capacitor C and voltmeters 
, 
and 
are connected to an oscillator in the circuit as shown in the adjoining diagram. When the frequency of the oscillator is increased, up to resonance frequency, the voltmeter reading (at resonance frequency) is zero in the case of :
A resistor R, an inductor L, a capacitor C and voltmeters , and are connected to an oscillator in the circuit as shown in the adjoining diagram. When the frequency of the oscillator is increased, up to resonance frequency, the voltmeter reading (at resonance frequency) is zero in the case of :
physics-General
physics-
In the series LCR circuit as shown in figure, the voltmeter and ammeter readings are :
In the series LCR circuit as shown in figure, the voltmeter and ammeter readings are :
physics-General
physics-
A time varying voltage V = 2t volt is applied across an ideal inductor of inductance L = 2H as shown in figure. Then select incorrect statement
A time varying voltage V = 2t volt is applied across an ideal inductor of inductance L = 2H as shown in figure. Then select incorrect statement
physics-General
physics-
A symmetrical converging convex lens of focal length 10 cm & diverging concave symmetrical lens of focal length - 20 cm are cut from the middle and perpendicularly and symmetrically to their principal axis. The parts thus obtained are arranged as shown in the figure. The focal length of this arrangement will be:
A symmetrical converging convex lens of focal length 10 cm & diverging concave symmetrical lens of focal length - 20 cm are cut from the middle and perpendicularly and symmetrically to their principal axis. The parts thus obtained are arranged as shown in the figure. The focal length of this arrangement will be:
physics-General
physics-
In the given figure an object ' O ' is kept in air in front of a thin plano convex lens of radius of curvature 10 cm. It's refractive index is 3/ 2 and the medium towards right of plane surface is water of refractive index 4/3. What should be the distance ' x ' of the object so that the rays become parallel finally
In the given figure an object ' O ' is kept in air in front of a thin plano convex lens of radius of curvature 10 cm. It's refractive index is 3/ 2 and the medium towards right of plane surface is water of refractive index 4/3. What should be the distance ' x ' of the object so that the rays become parallel finally
physics-General
physics-
In the figure shown, the image of a real object is formed at point I. AB is the principal axis of the mirror. The mirror must be:
In the figure shown, the image of a real object is formed at point I. AB is the principal axis of the mirror. The mirror must be:
physics-General
physics-
In the given figure a parallel beam of light is incident on the upper part of a prism of angle 
and R.I. 3/2. The light coming out of the prism falls on a concave mirror of radius of curvature 20 cm. The distance of the point (where the rays are focused after reflection from the mirror) from the principal axis is: [use 
= 3.14]
In the given figure a parallel beam of light is incident on the upper part of a prism of angle and R.I. 3/2. The light coming out of the prism falls on a concave mirror of radius of curvature 20 cm. The distance of the point (where the rays are focused after reflection from the mirror) from the principal axis is: [use = 3.14]
physics-General
physics-
In the shown figure 
and 
are two concave mirrors of the same focal length 10 cm. AB and CD are their principal axes respectively. A point object O is kept on the line AB at a distance 15 cm from . The distance between the mirrors is 20 cm. Considering two successive reflections first on M1 and then on . The distance of final image from the line AB is
In the shown figure and are two concave mirrors of the same focal length 10 cm. AB and CD are their principal axes respectively. A point object O is kept on the line AB at a distance 15 cm from . The distance between the mirrors is 20 cm. Considering two successive reflections first on M1 and then on . The distance of final image from the line AB is
physics-General
physics-
In the figure shown a point object O is placed in air. A spherical boundary of radius of curvature 1.0 m separates two media. AB is principal axis. The refractive index above AB is 1.6 and below AB is 2.0. The separation between the images formed due to refraction at spherical surface is
In the figure shown a point object O is placed in air. A spherical boundary of radius of curvature 1.0 m separates two media. AB is principal axis. The refractive index above AB is 1.6 and below AB is 2.0. The separation between the images formed due to refraction at spherical surface is
physics-General
physics-
In the figure shown a thin parallel beam of light is incident on a plane mirror 
at small angle 
. 
is a concave mirror of focal length ‘f’. After three successive reflections of this beam the x and y coordinates of the image is
In the figure shown a thin parallel beam of light is incident on a plane mirror at small angle . is a concave mirror of focal length ‘f’. After three successive reflections of this beam the x and y coordinates of the image is
physics-General
physics-
A light ray I is incident on a plane mirror M. The mirror is rotated in the direction as shown in the figure by an arrow at frequency 
rps. The light reflected by the mirror is received on the wall W at a distance 10 m from the axis of rotation. When the angle of incidence becomes 
the speed of the spot (a point) on the wall is
A light ray I is incident on a plane mirror M. The mirror is rotated in the direction as shown in the figure by an arrow at frequency rps. The light reflected by the mirror is received on the wall W at a distance 10 m from the axis of rotation. When the angle of incidence becomes the speed of the spot (a point) on the wall is
physics-General
physics-
Two plane mirrors of length L are separated by distance L and a man is standing at distance L from the connecting line of mirrors as shown in figure. A man is walking in a straight line at distance 2 L parallel to mirrors at speed u, then man at O will be able to see image of for time:
Two plane mirrors of length L are separated by distance L and a man is standing at distance L from the connecting line of mirrors as shown in figure. A man is walking in a straight line at distance 2 L parallel to mirrors at speed u, then man at O will be able to see image of for time:
physics-General
