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A scale reads 328 N when a piece of brass is hanging from it. What does it read (in N) when it is lowered so that the brass is submerged in water?
a body of mass 0.004kg executes SHM the force acting on the body when the displacement is 8cm is 0.024kgwt find the periodif the maximum velocity is 5m s find amplitude and maximum acceleration given g 9.8 m s²
A particle with the same charge as an electron experiences a force of 5.2 × 10-12N and traveling at a speed of 4.21 × 107m/s at right angles to a magnetic field. a. How strong is the magnetic field? b. What does its acceleration if its mass is 1.88 × 10-28 kg?
Suppose you have a circular coil with a radius of 7 cm that has 50 loops. The way it is oriented makes it form magnetic field lines normal to the area of the coil. If the magnetic field changed from 0.10 T to 0.75 T in 3 milliseconds, what is the average EMF induced in the coil?
Suppose you have a 70-cm solenoid having a cross-sectional area of 9 cm². This is wound with 900 turns of wire and carries a current of 3.4 A. Suppose that its core has a relative permeability of 400. What is the flux in the solenoid?
Consider a circular coil of radius 6 cm that has 70 loops. Its orientation forms magnetic field lines that are perpendicular to the area of the coil. Suppose the magnetic field changed from 0.20 T to 0.65 T in 5 milliseconds, how much average EMF is induced in the coil?
Consider a solenoid that is 50 cm long and has a cross-sectional area of 5 cm2. It is wound with 400 turns of wire, and a current of 2.3 A is supplied to it. Assume that its core has a relative permeability of 400. How much flux is in the solenoid?
A coil of wire is situated in a 0.5 T uniform magnetic field. The area of the coil is 2.0 m2. (a) What is the magnetic flux if the angle between the magnetic field and the normal to the surface of the coil is 60°? (b) After 5 s, the magnetic field is now parallel to the normal to the surface, (at 0°).
a 250v generator supplies through a pair of feeders to a load consisting of 200 lamps of 200 watt each, 50 lamps of 100 watt each and 25 lamps of 40 watt each at a distance of 200m. the potential difference across the lamps is 240v. find the cross-section area of the wire, if the specific resistance of the wire is 1.77 micro ohm cm
An oil drum with a diameter of 400mm and height of 2 meters is filled with water. calculate the force of pressure on the bottom of the tank.
