Field Due to a Solenoid
Trending Questions
Q. Explain Why magnetic field outside the solenoid is zero?
Q.
What does the divergence of magnetic field lines near the ends of a current-carrying straight solenoid indicate?
Q. A coil is rotated with constant angular speed in a uniform magnetic field about an axis that is perpendicular to the field.
STATEMENT-1: The EMF induced in the coil is maximum at the instant the magnetic flux through the coil is zero.
STATEMENT-2: The angle between the normal to the coil and magnetic field induction is 90∘.
STATEMENT-1: The EMF induced in the coil is maximum at the instant the magnetic flux through the coil is zero.
STATEMENT-2: The angle between the normal to the coil and magnetic field induction is 90∘.
- Both STATEMENT-1 and STATEMENT-2 are TRUE and STATEMENT-2 is the correct explanation of STATEMENT-1
- Both STATEMENT-1 and STATEMENT-2 are TRUE but STATEMENT-2 is the NOT the correct explanation of STATEMENT-1
- STATEMENT-1 is FALSE and STATEMENT-2 is TRUE
- Both STATEMENT-1 and STATEMENT-2 are WRONG
Q. A small circular loop of area A and resistance R is fixed on a horizontal xy−plane with the center of the loop always on the axis ^n of a long solenoid. The solenoid has m turns per unit length and carries current I counterclockwise as shown in the figure. The magnetic field due to the solenoid is in ^n direction. List–I gives time dependences of ^n in terms of a constant angular frequency ω. List-II gives the torques experienced by the circular loop at time t=π6ω Let α=A2μ20m2I2ω2R.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1800761/original_11.png)
Which one of the following options is correct
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1800761/original_11.png)
List-I | List-II | ||
(I) | 1√2(sinωt ^j+cos ωt ^k) | (P) | 0 |
(II) | 1√2(sin ωt^i+cos ωt ^j) | (Q) | −α4^i |
(III) | 1√2(sin ωt ^i+cos ωt ^k) | (R) | 3α4^i |
(IV) | 1√2(cos ωt ^j+sin ωt ^k) | (S) | α4^j |
(T) | −3α4^i |
Which one of the following options is correct
- I→Q, II→P, III→S, IV→R
- I→Q, II→P, III→S, IV→T
- I→S, II→T, III→Q, IV→P
- I→T, II→Q, III→P, IV→R
Q.
does magnetic field of solenoid depend upon radius?if it does why it is not included in the equation?
Q. Two cells of emf E1 and E2 (E2>E1) are connected in series in a secondary circuit of a potentiometer experiment for determination of emf. The balancing length is found to be 825 cm. Now when the terminals of cell of emf E1 are reversed, then the balancing length is found to be 225 cm. The ratio of E1 and E2 is, then-
Q. Calculate the inductance of a solenoid containing 200 turns, a length of 25 cm and an area of cross section of 8 cm2.
- 2.4×10−4H
- 1.6×10−4H
- 3.2×10−4H
- 0.8×10−4H
Q. In Fig. (a) and Fig. (b), two air-cored solenoids P and Q have been shown.
They are placed near each other. In Fig. (a), when IP , the current in P, changes at the rate of 5 A/s, an emf of 2 mV is induced in Q. The current in P is then switched off, and a current changing at 2 A/s is fed through Q as shown in diagram. What emf will be induced in solenoid P?
![](https://search-static.byjusweb.com/question-images/byjus/ckeditor_assets/pictures/918391/original_Q12.png)
- 5×10−3 V
- 8×10−4 V
- 8×10−2 V
- 2×10−3 V
Q.
A closely wound solenoid of 2000 turns and area of cross-section 1.6 × 10−4 m2, carrying a current of 4.0 A, is suspended through its centre allowing it to turn in a horizontal plane.
(a) What is the magnetic moment associated with the solenoid?
(b) What is the force and torque on the solenoid if a uniform horizontal magnetic field of 7.5 × 10−2 T is set up at an angle of 30º with the axis of the solenoid?