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One (1) gram of aradioactive substance disintegrates at the rate of 3.7 × 1010 per
second. The atomic weight of the substance is 226. Calculate its mean life.
What inductance will be needed to store 1.00 Wh of energy in a coil carrying a current of 20 A?
Using the Weiszacker’s formula, calculate the binding energy per nucleon for 235
92 U and
its two fission products: 149
60 Nd and 86
32Ge.
A long thin solenoid has radius 2.40 cm and 1000 turns per meter. The current in the solenoid is increasing at a constant rate of 50.0 A/s. Determine the magnitude of the induced electric field at a point inside the solenoid and 0.80 cm from the axis of the solenoid.
A solenoid has radius 2.20 cm, length 0.90 m and 1000 total number of turns. a) Determine the magnetic field energy density inside the solenoid. b) Calculate the total energy stored in the magnetic field inside the solenoid. Neglect the end effects.
Show that the continuity equation follows from Maxwell's equations.
A copper wire is stretched to make it 0.2% longer. What is the percentage change in its resistance?
A proton travels in a circular path with a radius of 4.10 mm in a magnetic field of strength 1.90 T. a) Calculate the speed of the proton. b) Determine the time required for it to make one–half of a revolution.
. Show that a uniform electric field cannot exist in the presence of a time-dependent magnetic field.
Show that a time-dependent magnetic field cannot exist without an electric field.
