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Three capacitors are connected to D.C. source of 100 volts shown in the adjoining figure. If the charge accumulated on plates of C1 , C2 and C3 are qa ,qb ,qc ,qd ,qe and qf respectively, then
The correct answer is:
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A parallel plate capacitor with air as medium between the plates has a capacitance of 10
. The area of capacitor is divided into two equal halves and filled with two media as shown in the figure having dielectric constant k1 = 2 and k2 = 4. The capacitance of the system will now be
A parallel plate capacitor with air as medium between the plates has a capacitance of 10. The area of capacitor is divided into two equal halves and filled with two media as shown in the figure having dielectric constant k1 = 2 and k2 = 4. The capacitance of the system will now be
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The capacity of an air condenser is 
. If a medium is placed between its plates. The capacity becomes 12mF. The dielectric constant of the medium will be
The capacity of an air condenser is . If a medium is placed between its plates. The capacity becomes 12mF. The dielectric constant of the medium will be
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As in figure shown, if a capacitor C is charged by connecting it with resistance R, then energy is given by the battery will be
As in figure shown, if a capacitor C is charged by connecting it with resistance R, then energy is given by the battery will be
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What is the area of the plates of a 3F parallel plate capacitor, if the separation between the plates is 5mm
What is the area of the plates of a 3F parallel plate capacitor, if the separation between the plates is 5mm
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A light bulb, a capacitor and a battery are connected together as shown here, with switch S initially open. When the switch S is closed, which one of the following is true
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An uncharged capacitor is connected to a battery. On charging the capacitor
An uncharged capacitor is connected to a battery. On charging the capacitor
physics-General
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A frictionless dielectric plate S is kept on a frictionless table T. A charged parallel plate capacitance C. (of which the plates are frictionless) is kept near it. The plate S is between the plates. When the plate S is left between the plates :
A frictionless dielectric plate S is kept on a frictionless table T. A charged parallel plate capacitance C. (of which the plates are frictionless) is kept near it. The plate S is between the plates. When the plate S is left between the plates :
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The capacity of a parallel plate capacitor increases with the :
The capacity of a parallel plate capacitor increases with the :
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The energy stored in a condenser of capacity C which has been raised to a potential V is given by
The energy stored in a condenser of capacity C which has been raised to a potential V is given by
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To make the central fringe at the centre O, a mica sheet of refractive index 1.5 is introduced. Choose the correct statements (s).
To make the central fringe at the centre O, a mica sheet of refractive index 1.5 is introduced. Choose the correct statements (s).
physics-General
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In a Young's double slit experiment, green light is incident on the two slits. The interference pattern is observed on a screen. Which of the following changes would cause the observed fringes to be more closely spaced?
In a Young's double slit experiment, green light is incident on the two slits. The interference pattern is observed on a screen. Which of the following changes would cause the observed fringes to be more closely spaced?
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Radio waves coming at 
to vertical are received by a radar after reflection from a nearby water surface & directly. What should be height of antenna from water surface so that it records a maximum intensity. (wavelength = 
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Radio waves coming at to vertical are received by a radar after reflection from a nearby water surface & directly. What should be height of antenna from water surface so that it records a maximum intensity. (wavelength = ).
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The figure shows a transparent slab of length 1m placed in air whose refractive index in x direction varies as 
The optical path length of ray R will be
The figure shows a transparent slab of length 1m placed in air whose refractive index in x direction varies as The optical path length of ray R will be
physics-General
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In the YDSE shown the two slits are covered with thin sheets having thickness t & 2t and refractive index 2m and m. Find the position (y) of central maxima
In the YDSE shown the two slits are covered with thin sheets having thickness t & 2t and refractive index 2m and m. Find the position (y) of central maxima
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Young’s double slit experiment is carried with two thin sheets of thickness 10.4 mm each and refractive index m1= 1.52 and m2 = 1.40 covering the slits S1 and S2 , respectively. If white light of range 400 nm to 780 nm is used then which wavelength will form maxima exactly at point O, the centre of the screen ?
Young’s double slit experiment is carried with two thin sheets of thickness 10.4 mm each and refractive index m1= 1.52 and m2 = 1.40 covering the slits S1 and S2 , respectively. If white light of range 400 nm to 780 nm is used then which wavelength will form maxima exactly at point O, the centre of the screen ?
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