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Ashutosh Patra
Subject: Physics
, asked on 17/4/18
a particle is projected with speed root(3GM/2R) form earth's surface at angle theta with vertical where 0<theta<90degree identify most appropriate statement among following-
a. the particle would escape from earths gravitational field
b. the particle would be set in an elliptical orbit around earth
c. the particle would rise initially and then return to earth and collide with it
d. cannot predict the motion
Answer
1
Aparna Sahu
Subject: Physics
, asked on 16/4/18
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Answer
1
Royel Ghost
Subject: Physics
, asked on 15/4/18
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Answer
2
Aparna Sahu
Subject: Physics
, asked on 10/4/18
23. An ideal monoatomic gas is taken round the cycle ABCDA as shown in the figure. The work done during the cycle is:
Answer
1
Aparna Sahu
Subject: Physics
, asked on 8/4/18
A tank containing water has two orifices at depths 40 cm and 90 cm below the free surface of water. The ratio of discharges through orifices is
(a) 4:9
(b) 2:3
(c) 5:9
(d) 1:1
Answer
1
Yashika Bhanwar
Subject: Physics
, asked on 4/4/18
In an hydrogen atom, the electron is making 6.6*10^15 rev/s around the nucleus in an orbit of radius 0.528angstrom. The magnetic moment (A-m^2) will be -
(a) 1*10^-15
(b) 1*10^-10
(c) 1*10^-23
(d) 1*10^-27
Answer
1
Yashika Bhanwar
Subject: Physics
, asked on 4/4/18
4. The uniform magnet field between the two identical plates is B parallel to the plates. Distance between the plates is d . There is a hole in a plane . If through this hole a particle of charge q mass m and kinetic energy E entres this magnetic field , then the particle will not collide with other plate provided.
Answer
1
Aparna Sahu
Subject: Physics
, asked on 4/4/18
Solve this.:
57. n=6 and l=3 is objected to magnetic field. The possible levels in which it can splits are .
(a) 3 (b) 12
(c) 7 (d) 18
Answer
2
Aparna Sahu
Subject: Physics
, asked on 4/4/18
Solve qus no. 63.
Q.63. Two ions having masses in the ratio 1 : 1 and charges 1 : 2 are projected from the same point into a uniform magnetic field with speeds in the ratio 2 : 3 perpendicular to the field. The ratio of the radii of circles along which the two particles move is
(a) 2 : 3
(b) 3 : 2
(c) 3 : 4
(d) 4 : 3
Answer
1
Aparna Sahu
Subject: Physics
, asked on 2/4/18
Solve this.
Answer
3
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Solve this please
Q.
A coil of one loop is made by a wire of length L and there after a coil of two loops is made by same wire. The ratio of magnetic field at the centre of coils respectively :-
(1) 1 : 4 (2) 1 : 1 (3) 1 : 8 (4) 4 : 1
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Solve this :
Q. An electron revolves with frequency 6.6 x 10
15
r.p.s. around nucleus in circular orbit of radius 0.53 Å of hydrogen atom, then magnetic field produced at centre of orbit is :-
(1) 0.125 T (2) 1.25 T (3) 12.5 T (4) 125 T
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Solve this :
75. An electron is moving in a circle of radius 5.1 x 10
-11
m. at a frequency of 6.8 x 10
15
revolution/sec. The equivalent current is approximately :-
(1) 5.1 x 10
-3
A (2) 6.8 x 10
-3
A
(3) 1.1 x 10
-3
A (4) 2.2 x 10
-3
A
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
77. An electron is moving around a proton in an orbit of radius 1
A
°
and produces 16 Wb/m
2
of magnetic field at the centre, then find the angular velocity of electron:-
1
.
20
π
×
10
16
rad
/
sec
2
.
10
×
10
16
rad
/
sec
3
.
5
2
π
×
10
16
rad
/
sec
4
.
5
4
π
×
10
16
rad
/
sec
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
A metal rod of mass 10 gm and length 25 cm is suspended on two springs as shown in figure. The springs are extended by 4 cm. When a 20 ampere current passes through the rod it rises by 1 cm. Determine the magnetic field assuming acceleration due to gravity to be 10 m/s
2
.
(1) 0.5 x 10
-2
T
(2) 5 x 10
-2
T
(3) 5 T
(4) 10 T
Answer
1
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What are you looking for?
a. the particle would escape from earths gravitational field
b. the particle would be set in an elliptical orbit around earth
c. the particle would rise initially and then return to earth and collide with it
d. cannot predict the motion
(a) 4:9
(b) 2:3
(c) 5:9
(d) 1:1
(a) 1*10^-15
(b) 1*10^-10
(c) 1*10^-23
(d) 1*10^-27
57. n=6 and l=3 is objected to magnetic field. The possible levels in which it can splits are .
(a) 3 (b) 12
(c) 7 (d) 18
Q.63. Two ions having masses in the ratio 1 : 1 and charges 1 : 2 are projected from the same point into a uniform magnetic field with speeds in the ratio 2 : 3 perpendicular to the field. The ratio of the radii of circles along which the two particles move is
(a) 2 : 3
(b) 3 : 2
(c) 3 : 4
(d) 4 : 3
Q. A coil of one loop is made by a wire of length L and there after a coil of two loops is made by same wire. The ratio of magnetic field at the centre of coils respectively :-
(1) 1 : 4 (2) 1 : 1 (3) 1 : 8 (4) 4 : 1
Q. An electron revolves with frequency 6.6 x 1015 r.p.s. around nucleus in circular orbit of radius 0.53 Å of hydrogen atom, then magnetic field produced at centre of orbit is :-
(1) 0.125 T (2) 1.25 T (3) 12.5 T (4) 125 T
75. An electron is moving in a circle of radius 5.1 x 10-11 m. at a frequency of 6.8 x 1015 revolution/sec. The equivalent current is approximately :-
(1) 5.1 x 10-3 A (2) 6.8 x 10-3 A
(3) 1.1 x 10-3 A (4) 2.2 x 10-3 A
(1) 0.5 x 10-2 T
(2) 5 x 10-2 T
(3) 5 T
(4) 10 T