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Two identical charges of 5nc repel each other when they are 5 cm apart from each other. find out the magnitude of force b/w them.
What is the magnitude of a point charge chosen so that the electric field intensity E has a magnitude of 3.30 N/C at a distance of 76cm. what do you mean by point charge?
A block of mass 4 kg is released from rest at the top of the curved frictionless
ramp shown below. The block slides down the ramp and collides with a 6 kg block at
rest at the bottom of the incline. The 6 kg block moves to the right at a speed
12.8 m/s immediately after the collision. The blocks do not stick together.
(a) The larger block slides a distance 15 m before coming to rest. Determine the
value of the coefficient of kinetic friction between the 6 kg block and the
surface on which it slides.
(b) Indicate whether the collision between the two blocks is elastic or inelastic.
Justify your answer.
What must be the distance between the point charge q 1 = 26.3C and q 2 = 38.2C in order to have a electrostatic attractive force between them has a magnitude of 4.89N.
Given A= 2i + 4j – 3k , B = 6i-4j+3k , C= 2i-2j+3k
Show that (i) A. B = B.A (ii) A*B = - B*A
(iii) A. (B+C) = A.B + A.C (iv) A* (B+C) = A*B + A*C
n electron in a uniform electric and magnetic field has a velocity of 1.20 104 m/s (in the positive x direction) and an acceleration of 2.00 1012 m/s2 (in the positive z direction). If the electric field has a magnitude of 20.0 N/C (in the positive z direction), what can you determine about the magnetic field in the region? What can you not determine
An electron is accelerated through 2 400 V from rest and then enters a uniform 1.70-T magnetic field. What are (a) the maximum and (b) the minimum values of the magnetic force this particle can experience?
The needle of a magnetic compass has magnetic moment 9.70 mA
m2. At its location, the Earth’s magnetic field is 55.0 mT north at 48.0° below the horizontal. (a) Identify the orientations of the compass needle that represent minimum potential energy and maximum potential energy of the needle–field system. (b) How much work must be done on the needle to move it from the former to the latter orientation?
A wire is formed into a circle having a diameter of 10.0 cm and placed in a uniform magnetic field of 3.00 mT. The wire carries a current of 5.00 A. Find (a) the maximum torque on the wire and (b) the range of potential energies of the wire–field system for different orientations of the circle.
Imagine a wire with linear mass density 2.40 g/m encircling the Earth at its magnetic equator, where the field is modeled as having the uniform value 28.0 mT horizontally north. What magnitude and direction of the current in the wire will keep the wire levitated immediately above the ground?
