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In an n-type silicon, which of the following statement is true ? (a) Electrons are majority carriers and trivalent atoms are the dopants. (b) Electrons are minority carriers and pentavalent
20
Oct
In an n-type silicon, which of the following statement is true ? (a) Electrons are majority carriers and trivalent atoms are the dopants. (b) Electrons are minority carriers and pentavalent In an n-type silicon which of the following statement is true ? (a) Electrons are majority carriers and trivalent atoms are the dopants. (b) Electrons [...]
Determine the number density of donor atoms which have to be added to an intrinsic germanium semiconductor to produce an n-type semi-conductor of conductivity 5 ohm/cm
20
Oct
Determine the number density of donor atoms which have to be added to an intrinsic germanium semiconductor to produce an n-type semi-conductor of conductivity 5 ohm/cm Determine the number density of donor atoms which have to be added to an intrinsic germanium semiconductor to produce an n-type semi-conductor of conductivity 5 ohm/cm October 20, 2020 [...]
Energy of the photon of sodium light of wavelength 5,890 A equals the energy gap between valence and conduction band of a semiconductor. Find the minimum energy E required to
20
Oct
Energy of the photon of sodium light of wavelength 5,890 A equals the energy gap between valence and conduction band of a semiconductor. Find the minimum energy E required to 890 A equals the energy gap between valence and conduction band of a semiconductor. Find the minimum energy E required to Energy of the photon [...]
A doped semiconductor has impurity levels 40 meV (millielectron volt) below the conduction band, (a) Is the material n-type or p-type? (b) In a thermal collision, an amount of energy KT
20
Oct
A doped semiconductor has impurity levels 40 meV (millielectron volt) below the conduction band, (a) Is the material n-type or p-type? (b) In a thermal collision, an amount of energy KT (a) Is the material n-type or p-type? (b) In a thermal collision A doped semiconductor has impurity levels 40 meV (millielectron volt) below the [...]
A metallic square loop PQRS is moving in its own plane with velocity v in a uniform magnetic field perpendicular to its plane as shown in Fig. If VP,VQ,VRandVS are the potentials of points P, Q, R and S then which of the following is an incorrect statement?
20
Oct
A metallic square loop PQRS is moving in its own plane with velocity v in a uniform magnetic field perpendicular to its plane as shown in Fig. If VP,VQ,VRandVS are the potentials of points P, Q, R and S then which of the following is an incorrect statement? -q A metallic square loop PQRS is [...]
A plane loop is shaped as two squares (Fig) and placed in a uniform magnetic field at right angle to the loop’s plane. The magnetic induction varies with time as B = B0 sin (ω)t , where B0 = 10 mT and (ω) = 100 rad/s. The wires do not touch at point A. If resistance per unit length of the loop is 50 m(Ω)/m, then amplitude of current induced in the loop is
20
Oct
A plane loop is shaped as two squares (Fig) and placed in a uniform magnetic field at right angle to the loop’s plane. The magnetic induction varies with time as B = B0 sin (ω)t , where B0 = 10 mT and (ω) = 100 rad/s. The wires do not touch at point A. If [...]
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A plane loop is shaped as two squares (Fig) and placed in a uniform magnetic field at right angle to the loop's plane. The magnetic induction varies with time as B = B0 sin (ω)t ,
then amplitude of current induced in the loop is ,
where B0 = 10 mT and (ω) = 100 rad/s. The wires do not touch at point A. If resistance per unit length of the loop is 50 m(Ω)/m ,
Suppose that the energy liberated in the combination of a hole-electron pair is converted into electromagnetic radiation. If the maximum wavelength of the radiation emitted is 630 mm, what
20
Oct
Suppose that the energy liberated in the combination of a hole-electron pair is converted into electromagnetic radiation. If the maximum wavelength of the radiation emitted is 630 mm, what Suppose that the energy liberated in the combination of a hole-electron pair is converted into electromagnetic radiation. If the maximum wavelength of the radiation emitted is [...]
A conducting loop of radius R is present in a uniform magnetic field B perpendicular to the plane of the ring. If radius R varies as a function of time t, as R=R0+t. The emf induced in the loop is
20
Oct
A conducting loop of radius R is present in a uniform magnetic field B perpendicular to the plane of the ring. If radius R varies as a function of time t, as R=R0+t. The emf induced in the loop is A conducting loop of radius R is present in a uniform magnetic field B perpendicular [...]
A radioactive nucleus A with a half-life T, decays into a nucleus B. At t = 0, there is no nucleus B. At some time t, the ratio of the number of B to that of A is 0.3. Then, t is given by
20
Oct
A radioactive nucleus A with a half-life T, decays into a nucleus B. At t = 0, there is no nucleus B. At some time t, the ratio of the number of B to that of A is 0.3. Then, t is given by A radioactive nucleus A with a half-life T decays into a [...]
A wire loop is placed in a region of time varying magnetic field which is oriented orthogonally to the plane of the loop as shown in Fig. The graph shows the magnetic field variation as the function of time. Assume the positive emf is the one which drives a current in the clockwise direction and seen by the observer in the direction of B. Which of the following graphs best represents the induced emf as a function of time?
20
Oct
A wire loop is placed in a region of time varying magnetic field which is oriented orthogonally to the plane of the loop as shown in Fig. The graph shows the magnetic field variation as the function of time. Assume the positive emf is the one which drives a current in the clockwise direction and [...]