NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Expert Answers
ALL
Annabeth Chase
Subject: Physics
, asked on 1/4/18
3. Figure shows a square loop with edge length 'a' meter. The resistance of wire ABC is 'r'
Ω
and that of ADC is '2r'
Ω
. Magnetic field at the centre of the loop is:-
1
.
10
2
μ
0
3
πa
⊗
2
.
10
2
μ
0
3
πa
⊙
3
.
2
μ
0
6
πa
⊗
4
.
2
μ
0
6
πa
⊙
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Solve both the questions plzz..
Magnetic moment and angular momentum of an orbit electron are 'M' and L respectively. Specific charge of orbital
electron :-
1
)
M
2
L
2
)
2
M
L
3
)
L
2
M
4
)
2
L
M
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Q.):- Four wires each of length 2.0 m, are bent in four loop P, Q, R and S then suspended in uniform magnetic field. All loop carries equal currents, which statement of the following is true:
1. Couple acting on the loop P is greatest.
2. Couple acting on the loop Q is greatest.
3. Couple acting on the loop R is greatest.
4. Couple acting on the loop S is greatest.
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Q.
A coil of 100 turns kept in magnetic field B- 0.2T, carries a current of 2A as shown in figure. Torque on coil and which side of coil comes out from the plane of the paper :-
(1) 0.16 N-m, BC side comes out from plane of paper
(2) 0.16 N-m, AD side comes out from plane of paper
(3) 0.32 N, BC side comes out from plane of paper
(4) 0.32 N, AD side comes out from plane of paper
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Solve this plzzz...
Q. A rectangular loop ABCD is placed near on infinite length current carrying wire. Magnetic force on the loop is :-
(1) 1.25 x 10
-4
N, Attraction (2) 1.25 x 10
-4
N, Repulsion.
(3) 12.5 x 10
-4
N, Repulsion (4) 12.5 x 10
-4
N, Attraction.
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Q 9. A beam of proton moving with velocity 4 x 10
5
m/sec enters in a uniform magnetic field at 0.3 T at an angle of 60
o
to the magnetic field. Calculate radius of helical path and pitch of helix.
Q 10. A proton is projected with a speed of 2 x 10
6
m/sec at an angle of 60
o
to the x-axis. If a uniform magnetic field of 0.104T is applied along y axis. Calculate radius of helix and time period of proton.
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Solve this plzz...
4. An electron is moving at 10
6
m/sec in a direction parallel to a current of 5A flowing through an infinite long straight wire separated by a perpendiculr distance of 10 cm in air. Magnetic force experienced by the electron:-
1) 1.6 x 10
-19
N 2) 1.6 x 10
-20
N
3)1.6 x 10
-18
N 4) 1.6 x 10
-21
N
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Solve this plzzz...:
3. Three identical long solenoids P, Q and R connected to each other as shown in figure. If the magnetic field at the centre of P is 2.0 T, what would be the field at the centre of Q ?
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
↵
Solve this plzzz...
Radius of current carrying coil is R. If fractional decreases in field value with respect to centre of the coil for a near by axial point is 1% then find axial position of that point.
The ratio of magnetic field at centre of circular loop to the magnetic field at the centre of square loop.
Solve this plzzz...
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Find out the magnetic field at point O for the following current distribution..:
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Find out the magnetic field at point O for the following current distribution..
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Find out the magnetic field at point O for the following current distribution..
Q.
Find out the magnetic field at point O for the following current distribution.
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Solve this plzzz..
Two concentre coplanner coils of turns n
1
and n
2
, have radii ratio 2 : 1 respectively. Equal current in both the coils flows in opposite direction. If net magnetic field is zero at their common centre then n
1
: n
2
is :-
1) 2:1 2) 1:2 3) 1:1 4) 4:1
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Magnetic field at the centre of regular polygon of 'n' sides which is formed by wire, which carries
current I and side of polygon is 'a' :-
1
n
μ
0
I
πa
sin
π
n
c
o
t
π
n
2
n
μ
0
I
πa
cos
π
n
tan
π
n
3
n
μ
0
I
πa
sin
π
n
tan
π
n
4
n
μ
0
I
πa
Answer
1
Annabeth Chase
Subject: Physics
, asked on 1/4/18
Q. For given current distribution, each infinite length wire produces magnetic field 'B' at origin then resultant magnetic field at origin 'O' is :-
1
4
B
2
2
B
C
2
2
B
D
z
e
r
o
Answer
1
Prev
3
4
5
6
7
Next
What are you looking for?
Magnetic moment and angular momentum of an orbit electron are 'M' and L respectively. Specific charge of orbital
electron :-
1. Couple acting on the loop P is greatest.
2. Couple acting on the loop Q is greatest.
3. Couple acting on the loop R is greatest.
4. Couple acting on the loop S is greatest.
(1) 0.16 N-m, BC side comes out from plane of paper
(2) 0.16 N-m, AD side comes out from plane of paper
(3) 0.32 N, BC side comes out from plane of paper
(4) 0.32 N, AD side comes out from plane of paper
Q. A rectangular loop ABCD is placed near on infinite length current carrying wire. Magnetic force on the loop is :-
(1) 1.25 x 10-4N, Attraction (2) 1.25 x 10 -4 N, Repulsion.
(3) 12.5 x 10-4 N, Repulsion (4) 12.5 x 10-4 N, Attraction.
Q 10. A proton is projected with a speed of 2 x 106 m/sec at an angle of 60o to the x-axis. If a uniform magnetic field of 0.104T is applied along y axis. Calculate radius of helix and time period of proton.
4. An electron is moving at 106 m/sec in a direction parallel to a current of 5A flowing through an infinite long straight wire separated by a perpendiculr distance of 10 cm in air. Magnetic force experienced by the electron:-
1) 1.6 x 10-19 N 2) 1.6 x 10-20 N
3)1.6 x 10-18 N 4) 1.6 x 10-21 N
3. Three identical long solenoids P, Q and R connected to each other as shown in figure. If the magnetic field at the centre of P is 2.0 T, what would be the field at the centre of Q ?
Radius of current carrying coil is R. If fractional decreases in field value with respect to centre of the coil for a near by axial point is 1% then find axial position of that point.
Q. Find out the magnetic field at point O for the following current distribution.
Two concentre coplanner coils of turns n1 and n2, have radii ratio 2 : 1 respectively. Equal current in both the coils flows in opposite direction. If net magnetic field is zero at their common centre then n1: n2 is :-
1) 2:1 2) 1:2 3) 1:1 4) 4:1
current I and side of polygon is 'a' :-