Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
Three charges ( each Q ) are placed at the three corners of an equilateral triangle. A fourth charge q is placed at the centre of the triangle . The ratio [q/Q] so as to make the system in equilibrium is
29
Oct
Three charges ( each Q ) are placed at the three corners of an equilateral triangle. A fourth charge q is placed at the centre of the triangle . The ratio [q/Q] so as to make the system in equilibrium is A positive point charge 50 muC is located in the plane xy at a [...]
A positive point charge 50 muC is located in the plane xy at a point with radius vector r0 = 2i + 3j . THe electric field vector E at a point with radius vector r = 8 i – 5 j, where r0 and r are expressed in meter , is
29
Oct
A positive point charge 50 muC is located in the plane xy at a point with radius vector r0 = 2i + 3j . THe electric field vector E at a point with radius vector r = 8 i – 5 j, where r0 and r are expressed in meter , is A positive point [...]
A 10 cm long perfectly conducting wire PQ is moving with a velocity 1 cm/s on a pair of horizontal rails of zero resistance. One side of the rails is connected to an inductor L = 1 mH and a resistance R = 1Ω as shown in figure. The horizontal rails L and R lie in the same plane with a uniform magnetic field B = 1 T perpendicular to the plane. If the key S is closed at certain instant the current in the circuit after 1 millisecond is x × 10–3 A where the value of x is ______.[Assume the velocity of wire PQ remains constant 1 cm/s after key S is closed. Given: e–1 = 0.37 where e is base of the natural logarithm]
29
Oct
A 10 cm long perfectly conducting wire PQ is moving with a velocity 1 cm/s on a pair of horizontal rails of zero resistance. One side of the rails is connected to an inductor L = 1 mH and a resistance R = 1Ω as shown in figure. The horizontal rails L and R lie [...]
Conducting wire of parabolic shape, initially y = x^2 is moving with velocity V = v0iˆ in a non-uniform magnetic field B = B0 (1+(y/ L )β )kˆ as shown in figure. If V0,B 0 L and B are +ve constant Δϕ is potential difference develop between the ends of wire, then correct statements (s) is/are
29
Oct
Conducting wire of parabolic shape, initially y = x^2 is moving with velocity V = v0iˆ in a non-uniform magnetic field B = B0 (1+(y/ L )β )kˆ as shown in figure. If V0,B 0 L and B are +ve constant Δϕ is potential difference develop between the ends of wire, then correct statements (s) [...]
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B 0 L and B are +ve constant Δϕ is potential difference develop between the ends of wire ,
Conducting wire of parabolic shape ,
initially y = x^2 is moving with velocity V = v0iˆ in a non-uniform magnetic field B = B0 (1+(y/ L )β )kˆ as shown in figure. If V0 ,
then correct statements (s) is/are ,
Four identical charges Q are fixed at the four corners of a square of side a. The electric field at a point P located symmetrically at a distance a/ root 2 from the centre of the square is
29
Oct
Four identical charges Q are fixed at the four corners of a square of side a. The electric field at a point P located symmetrically at a distance a/ root 2 from the centre of the square is Four identical charges Q are fixed at the four corners of a square of side a. The [...]
Two pith balls each with mass m are suspended from insulating threads. When the pith balls are given equal positive charge Q, they hang in equilibirum as shown. We now increase the charge on the left pith ball from Q to 2Q while leaving its mass essentially unchanged. Which of he following diagrams best represent the new equilibrium configuration?
29
Oct
Two pith balls each with mass m are suspended from insulating threads. When the pith balls are given equal positive charge Q, they hang in equilibirum as shown. We now increase the charge on the left pith ball from Q to 2Q while leaving its mass essentially unchanged. Which of he following diagrams best represent [...]
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A positive point charge 50 muC is located in the plane xy at a point with radius vector r0 = 2i + 3j . THe electric field vector E at a point with radius vector r = 8 i - 5 j ,
is ,
Two pith balls each with mass m are suspended from insulating threads. When the pith balls are given equal positive charge Q ,
where r0 and r are expressed in meter ,
Two identical moving coil galvanometers have 10 Ω resistance and full scale deflection at 2 μA current. One of them is converted into a voltmeter of 100 mV full scale reading and the other into an Ammeter of 1 mA full scale current using appropriate resistors. These are then used to measure the voltage and current in the Ohm’s law experiment with R = 1000 Ω resistor by using an ideal cell. Which of the following statements is/are correct?
29
Oct
Two identical moving coil galvanometers have 10 Ω resistance and full scale deflection at 2 μA current. One of them is converted into a voltmeter of 100 mV full scale reading and the other into an Ammeter of 1 mA full scale current using appropriate resistors. These are then used to measure the voltage and [...]
An EM wave from air enters a medium. The electric fields are E1 = E01 x cos [ 2 pie v { z/c – t } ] in air and E 2 =E 02 x ^ cos[k(2z−ct)] in medium, where the wave number k and frequency v refer to their values in air. The medium is non-magnetic. If ϵ r 1 and ϵ r 2 refer to relative permittivities of air and medium respectively, which of the following options is correct?
29
Oct
An EM wave from air enters a medium. The electric fields are E1 = E01 x cos [ 2 pie v { z/c – t } ] in air and E 2 =E 02 x ^ cos[k(2z−ct)] in medium, where the wave number k and frequency v refer to their values in air. [...]
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An EM wave from air enters a medium. The electric fields are E1 = E01 x cos [ 2 pie v { z/c - t } ] in air and E 2 =E 02 x ^ cos[k(2z−ct)] in medium ,
where the wave number k and frequency v refer to their values in air. The medium is non-magnetic. If ϵ r 1 and ϵ r 2 refer to relative permittivities of air and medium respectively ,
which of the following options is correct? ,
A red LED emits light at 0.1 watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 m from the diode is
29
Oct
A red LED emits light at 0.1 watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 m from the diode is A red LED emits light at 0.1 watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 [...]
During the propagation of electromagnetic waves in a medium :
29
Oct
During the propagation of electromagnetic waves in a medium : During the propagation of electromagnetic waves in a medium : October 29, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,