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When the coil is turned slightly and released, it oscillates about its stable equilibrium with a frequency of 2.0 s-1. What is the moment of inertia of the coil about its axis of rotation?
What is the force and torque on the solenoid if a uniform horizontal magnetic field of 7.5 × 10-2T is set up at an angle of 30º with the axis of the solenoid?
What is the amount of work required by an external torque to turn the magnet so as to align its magnetic moment: (i) normal to the field direction, (ii) opposite to the field direction?
If the solenoid in Exercise 5.5 is free to turn about the vertical direction and a uniform horizontal magnetic field of 0.25 T is applied, what is the magnitude of torque on the solenoid when its ax
After reaching the bottom of the slope, the block continues to slide on the level ground for 30.0 m before stopping, what is the kinetic coefficient of friction between the level ground and the bloc
Find the force required to give a helicopter of mass M an acceleration of 0.25g upward. What would be the apparent weight in newtons of a passenger of the helicopter while it is accelerating upward?
Calculate the thrust in newtons that is needed for curiosity to land on the martian surface at 1.7 mi/h. The acceleration due to the gravity on mars is 3.76 m/s^2.
A closely wound solenoid of 800 turns and area of cross section 2.5 × 10-4 m2 carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated
If the bar is free to rotate in the plane of the field, which orientation would correspond to its (a) stable, and (b) unstable equilibrium? What is the potential energy of the magnet in each case?
Consider a tank containing 40.0 kg of water. Neglecting the heat capacity of the tank, how much heat (in joules) would be required to raise the water temperature of from 1 to 94 degrees Celsius?
A short bar magnet placed with its axis at 30º with a uniform external magnetic field of 0.25 T experiences a torque of magnitude equal to 4.5 × 10-2 J. What is the magnitude of magnetic
What is the power radiated (in watts) by the sphere? For simplicity, assume the sphere and the vessel are both ideal blackbody radiators, with emissivity e = 1.
What value of current (with appropriate sense of circulation) in the windings of the solenoid can support the weight of the wire? g = 9.8 m s-2
Would doubling the angular acceleration during the given period have doubled final angular speed?
A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in the coil is 5.0 A, what is the (a) total torque on the
A uniform magnetic field of 1.5 T exists in a cylindrical region of radius10.0 cm, its direction parallel to the axis along east to west. A wire carrying current of 7.0 A in the north to south direc
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 repulsive?
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 m s-2.
Determine the trajectory of the electron if the field (a) is transverse to its initial velocity, (b) makes an angle of 30º with the initial velocity.
A charged particle enters the chamber and travels undeflected along a straight path with constant speed. What can you say about the initial velocity of the particle?
Ignoring viscosity, calculate the difference between the fluid pressure at location 2 and the fluid pressure at location 1.
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 t