Author: Anonymous

A uniform magnetic field passes through a horizontal circular wire loop at an angle  16.2°  from the normal to the plane of the loop. The magnitude of the magnetic field is [B]  T , and the radius of the wire loop is [r]  m . Find the magnetic flux through the loop.

A charged particle is moving with speed v perpendicular to a uniform magnetic field. A second identical charged particle is moving with speed 2v perpendicular to the same magnetic field. The frequency of revolution of the first particle is f. The frequency of revolution of the second particle is

The magnetic field produced by a long straight current carrying wire is 

The phase angle of a series  RL ac circuit with a 100-Ω resistor and a 20.0-mH inductor is 70.0°. What is the inductive reactance of this circuit?

The ampere is defined using the [BLANK-1] between current carrying wires

A 109  turn circular coil of radius  2.41  cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. Over an interval of  0.159  s , the magnetic field strength increases from 58.3  mT to  98.3  mT . Find the magnitude of the average emf  induced in the coil during this time interval, in millivolts.

A simple ac circuit is composed of a capacitor connected across the terminals of an ac power source. If the frequency of the source is doubled, what happens to the reactance of the capacitor?

An ideal parallel-plate capacitor has a capacitance of  C. If the area of the plates is doubled and the distance between the plates is halved, what is the new capacitance?

A heart defibrillator being used on a patient has a resistance of [R] k  Ω and a capacitance of [C] μF.  If the initial voltage is 12.0 kV, how long does it take to decline to 600 V?

You are given a copper bar of dimensions 3 cm × 5 cm × 8 cm and asked to attach leads to it in order to make a resistor. If you want to achieve the  largest possible resistance, you should attach the leads to the opposite faces that measure