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What is the magnitude of magnetic force per unit length on a wire carrying a current of 8 A and making an angle of 30º with the direction of a uniform magnetic field of 0.15

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A 3.0 cm wire carrying a current of 10 A is placed inside a solenoid perpendicular to its axis. The magnetic field inside the solenoid is given to be 0.27 T. What is the magnetic force on the

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Two long and parallel straight wires A and B carrying currents of 8.0 A and 5.0 A in the same direction are separated by a distance of 4.0 cm. Estimate the force on a 10 cm section of wire

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm. If the current carried is 8.0 A, estimate the magnitude of B inside the solenoid near its

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A square coil of side 10 cm consists of 20 turns and carries a current of 12 A. The coil is suspended vertically and the normal to the plane of the coil makes an angle of 30º with the direction of a uniform horizontal magnetic field of magnitude 0.80 T. What is the magnitude of torque experienced by the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Two moving coil meters, M1 and M2 have the following particulars: R1 = 10 Ω, N1 = 30, A1 = 3.6 × 10–3 m2 , B1 = 0.25 T R2 = 14 Ω, N2 = 42, A2 = 1.8 × 10–3 m2 , B2 = 0.50 T (The spring constants are identical for the two meters). Determine the ratio of(i) current sensitivity (ii) voltage sensitivity of M2 and M1

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In a chamber, a uniform magnetic field of 6.5 G (1 G = 10 –4 T) is maintained. An electron is shot into the field with a speed of 4.8 × 106 m s–1 normal to the field. Explain why the path of the electron is a circle. Determine the radius of the circular orbit. (e = 1.5 × 10–19 C, `m_e` = 9.1×10–31

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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In Exercise 4.11 obtain the frequency of revolution of the electron in its circular orbit. Does the answer depend on the speed of the electron?

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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(i) A circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of 60° with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning.(ii) Would your answer change, if the circular coil in (a) were replaced by a planar coil

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Two concentric circular coils X and Y of radii 16 cm and 10 cm, respectively, lie in the same vertical plane containing the north to south direction. Coil X has 20 turns and carries a current of 16 A; coil Y has 25 turns and carries a current of 18 A. The sense of the current in X is anticlockwise, and clockwise in Y, for an observer looking at the coils facing west. Give the magnitude and direction of the net magnetic field due to the coils at their

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A magnetic field of 100 G (1 G = 10–4 T) is required which is uniform in a region of linear dimension about 10 cm and area of cross-section about 10–3 m2 . The maximum current-carrying capacity of a given coil of wire is 15 A and the number of turns per unit length that can be wound round a core is at most 1000 turns m–1. Suggest some appropriate design particulars of a solenoid for the required purpose. Assume the core is not

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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For a circular coil of radius R and N turns carrying current I, the magnitude of the magnetic field at a point on its axis at a distance x from its centre is given by, B=`(mu_0IR^2N ) /(2(x^2+R^2)^(3/2))`(i) Show that this reduces to the familiar result for field at the centre of the coil.(ii) Consider two parallel co-axial circular coils of equal radius R, and number of turns N, carrying equal currents in the same direction, and separated by a distance R. Show that the field on the axis around the mid-point between the coils is uniform over a distance

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A toroid has a core (non-ferromagnetic) of inner radius 25 cm and outer radius 26 cm, around which 3500 turns of a wire are wound. If the current in the wire is 11 A, what is the magnetic field(i) outside the toroid,(ii) inside the core of the toroid, (iii) in the empty space surrounded by the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions: A magnetic field that varies in magnitude from point to point but has a constant direction (east to west) is set up in a chamber. A charged particle enters the chamber and travels undeflected along a straight path with constant speed. What can you say

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions: A charged particle enters an environment of a strong and non-uniform magnetic field varying from point to point both in magnitude and direction, and comes out of it following a complicated trajectory. Would its final speed equal the initial speed if it suffered no collisions

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Answer the following questions: An electron travelling west to east enters a chamber having a uniform electrostatic field in north to south direction. Specify the direction in which a uniform magnetic field should be set up to prevent the electron from deflecting from its straight line

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An electron emitted by a heated cathode and accelerated through a potential difference of 2.0 kV, enters a region with uniform magnetic field of 0.15 T. Determine the trajectory of the electron if the field(i) is transverse to its initial velocity,(ii) makes an angle of 30º with the initial

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A magnetic field set up using Helmholtz coils (described in Exercise 4.16) is uniform in a small region and has a magnitude of 0.75 T. In the same region, a uniform electrostatic field is maintained in a direction normal to the common axis of the coils. A narrow beam of (single species) charged particles all accelerated through 15 kV enters this region in a direction perpendicular to both the axis of the coils and the electrostatic field. If the beam remains undeflected when the electrostatic field is 9.0 × 10–5 V m–1, make a simple guess as to what the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A straight horizontal conducting rod of length 0.45 m and mass 60 g is suspended by two vertical wires at its ends. A current of 5.0 A is set up in the rod through the wires.(i) What magnetic field should be set up normal to the conductor in order that the tension in the wires is zero?(ii) What will be the total tension in the wires if the direction of current is reversed keeping the magnetic field same as before? (Ignore the mass of the wires.) g = 9.8 ms–2

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The wires which connect the battery of an automobile to its starting motor carry a current of 300 A (for a short time). What is the force per unit length between the wires if they are 70 cm long and 1.5 cm apart? Is the force attractive or

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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