A closely wound solenoid of 800 turns and area of cross section `2*5xx10^-4m^2` carries a current of `3*0A`. Explain the sense in which the solenoid acts like a bar magnet. What is its associated magnetic moment?

A closely wound solenoid of 800 turns and area of cross section 2.5xx10^(-4)m^2 carries a current of 3.0 A . Explain te sense in which the solenoid acts like a bar magnet . What is its associated magnetic moment ?

A closely wound solenoid of 2000 turns and are of cross - section 1.6xx10^(-4)m^2 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 7.5xx10^(-2)T is set up at an angle of 30^@ with the axis of the solenoid ?

A solenoid of length 0.5 m has a radius of 1 cm and is made up of 500 turns. It carries a current of 5 A. What is the magnitude of magnetic field inside the solenoid ?

An air-cored solenoid with length 30 cm, area of cross-section 25cm^(2) and number of turns 500, carries a current of 2.5 A. The current is suddenly switched off in a brief time of 10^(-3)s . How much is the average back emf induced across the ends of the open switch in the circuit? Ignore the variation in magnetic field near the ends of the solenoid.

A 100 turn closely wound circular coil of radius 10 cm carries a current of 3.2 A. a. What is the field at the centre of the coil ? b. What is the magnetic moment of this coil ? The coil is placed in a vertical plane and is free to rotate about a horizontal axis which coincides with its diameter. A unifrom magnetic field of 2 T in the horizontal direction exists such that initially the axis of the coil is in the direction of the field. The coil rotates through an angle of 90^@ under the influence of the magnetic field . c. What are the magnitudes of the torques on the coil in the initial and final position ? d. What is the angular speed acqired by the coil when it has rotated by 90^(@) ? The moment of inertia of the coil is 0.1 kg m^2

A tightly-wound, long solenoid having 50 turns cm^(-1) , carris a current of 4.00 A . Find the magnetic intensity H and the magnetic field B at the centre of the solenoid. What will be the values of these quantities if an iron core is inserted in the solenoid and the magnetization I in the core is 4.00 xx 10^6 A m^(-1) ?

A long solenoid has 200 turns per cm. and carries a current of 2.5 amps. The magnetic field at its centre is (muo=4pixx10^-7wber//amp-m) …

What is the self-inductance of a solenoid of length 40cm, area of cross - section 20cm^(2) and total number of turns is 800 ?

A tightly- wound solenoid of radius a and length l has n turns per unit length. It carries an electric current i. Consider a length dx of the solenoid at a distance x from one end. This contains n dx turns and may be approximated as a circular current I n dx. (a) Write the magnetic field at the center of the solenoid due to this circular current. Integrate this expression under proper limits to find the magnetic field at the center of the solenoid. (b) Verify that if lgtgta , the field tends to (B=(mu_0ni) and if agtgt1 , the field tends to B= ((mu_0)nil/2a) . Interpret these results.