14. In the figure, a bar magnet moves towards the solenoid. The direction of the induced current through the resistor R is R ww A) a to b b to a В) C) no current is induced

Q: A circular coil 11.0 cm in diameter and containing nine loops lies flat on the ground. The Earth's…

A: Given: diameter of coil d = 11.0 cm number of loop n =9 Magnitude of earth magnetic field at…

Q: A permanent magnet moving up and down on the end of a spring induces an e.m.f. in a coil Which…

A: Ques: we have a permanent magnet attached with spring and a coil

Q: A circular coil consisting of a single loop of wire has a radius of 30.0 cm and carries a current of…

A:

Q: 31) A loop of wire is placed in a magnetic field as shown. If the magnetic field's strength is…

A: Given that Initial Magnetic field B1 = 2 T Final Magnetic field B2 = 20 T Time t = 3 s Area of the…

Q: 29) A flat coil is in a uniform magnetic field. The magnetic flux through the coil is greatest when…

A:

Q: 22. If on looking at any one end of a solenoid, the direction of current flow is found to be…

A:

Q: Current is induced by a stationary conductor placed in a region of the stationary magnetic field.…

A: Faraday's Law tells us that inducing a voltage into a conductor can be done by either passing it…

Q: A bar magnet with its north pole pointing downward is falling toward the center of a horizontal…

A: To find: A bar magnet with its north pole pointing downward is falling toward the center of a…

Q: Assuming the Earth's magnetic field averages about 0.50×10-4 T near Earth's surface, estimate the…

A:

Q: 17. According to the Len’s Law, the direction of the magnetic field induced by a current always have…

A: To discuss Lenz law.

Q: 16. A solenoid of length 0-20 m, having 120 turns carries a current of 2-5 A. Find the magnetic…

A:

Q: A bar magnet is falling approaching a loop of wire, the induced current in the loop of wire sets up…

A: Force on the magnet due yo induced current in the loop be repulsive.

Q: (4) A solenoid 0.28 m long has 1200 turns of wire. What should the current in the solenoid be in…

A: Given Length of Solenoid L = 0.28m No of turns N = 1200 Magnetic Field B = 2.5×10-5 Tesla Current I…

Q: How does reversing the pole of the bar magnet affect the magnitude and direction of the induced…

A: Whenever there is a relative motion between bar magnet and copper coil then an current in induced…

Q: 5. A solenoid is connected to a battery as shown in Fig. 20.51, and a bar magnet is placed nearby.…

A:

Q: A wire loop moves at constant velocity without rotationthrough a constant magnetic field. The…

A: Wire loop is moving in a magnetic field

Q: In the figure below, a solenoid is moved toward a bar magnet. The current induced through the…

A:

Q: A 6.0 H coil whose resistance is 12 ohms is connected in series with a 24 ohms resistor and to a 144…

A:

Q: As shown, a square loop of wire, with a mass of 200 g, is free to pivot about a horizontal axis…

A:

Q: Consider a 75.0 Ohm, 5.08-cm circular loop (diameter) with 100.0 turns in the plane of the page and…

A:

Q: 3. If the current is increased in a coil, the magnetic field: a) increases b) remains the same c)…

A: Magnetic field due to current-carrying circular loop at the center of the loop is given by:

Q: How much current is needed in a 5-winding, 10 cm diameter coil to produce a 0.5 G magnetic field at…

A:

Q: A square loop 24.0 cm on a side has a resistance of 6.10 Ω It is initially in a 0.665-T magnetic…

A: Magnetic flux is the field lines passing through particular area when that area loop is kept…

Q: An air-cored solenoid with length 30 cm, area of cross-section 25 cm2 and number of turns 500,…

A:

Q: The 1700-turn coil in a dc motor has an area per turn of 1.2 × 10-2 m2. The design for the motor…

A:

Q: 6. A 10 cm long rod is placed on two parallel rails so that it completes a loop. This device is…

A: Given  Length of rod l=0.1 m Magnetic field B=4T

Q: 17. A 6.0 H coil whose resistance is 12 Ω is connected in series with a 24 Ω resistor and to a 144 V…

A: Inductance of coil =6H Resistance of coil = 12 ohm Resistance in series = 24 ohm V= 144v

Q: 20.A solenoid 150 cm long with 1550 turns has a central magnetic field of 1.50 mT. Find the current…

A: Given that, Length of solinoid (L)= 1.50 m Number of turns(N)= 1550 Magnetic field (B)= 1.50 × 10-³…

Q: . The vertical magnetic field, initially zero, is slowly increased. When the field strength reaches…

A: In this problem  Frictional force = magnetic  force μmg= BIL Given that B=B0

Q: A wire loop in the presence of an "out-of B-field is twisted, as shown A wire loop is moved to the…

A:

Q: 9. A flat coil is in a uniform magnetic field. The magnetic flux through the coil is greatest when…

A: Let the magnetic field strength = B Let the area of the flat coil = A Let the angle between the…

Q: Which part of the D.C motor is used to change the direction of aurrent after a half cyc O a. Loop or…

A: Required : Which part of the DC motor is used to change the direction of the current after a half…

Q: 16. A solenoid of length 0-20 m, having 120 turns carries a current of 2-5 A. Find the magnetic…

A:

Q: Suppose you plan to make an electromagnet by passing electric current through this solenoid so that…

A: In Electromagnetics concept,  When we make any electromagnet by passing the current, we get  North…

Q: 18. A 0.65-T magnetic field is perpendicular to a circular loop of wire with 73 turns and a radius…

A:

Q: 2) A single-turn wire loop 10 cm in diameter carries a 12-A current. It experiences a 0.015 Nm…

A: When a current carrying loop is placed in magnetic field at some angle then it experience torque.

Q: A motor run by a 8.8-V battery has a 17-turn square coil with sides of length 4.2 cm and total…

A: The given values are, V=8.8 Vn=17a=4.2 cm=0.042 mR=29 ΩB=0.022 T

Q: How does the rate of motion of the bar magnet affect the magnitude and direction of the induced…

A:

Q: 99. State the direction of the induced current for each case shown below, observing from the side of…

A: Solution:

Q: A 550-turn solenoid is 17 cm long. The current into it is 34 A. A 3.4 cm -long straight wire cuts…

A:

Q: does reversing the pole of the bar magnet affect the magnitude and direction of the induced current?

A: The magnitude of the induced emf is proportional to the rate of change of magnetic flux. ε=dΦdt

Q: A galvanometer has a rectangular coil side of 10mm*30mm pivoted about the center of shorter side. It…

A:

Q: 2. Calculate both magnetic flux and magnetic field strength on the axis of solenoid with length 1 cm…

A: Given, Length of solenoid ,l = 1cm = 0.01m Number of turns = 200 Current, I = 1.5 A

Q: 3) 1250 circular loops are staked together and placed inside of a solenoid (a region of uniform…

A:

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.