Physics Answers

If a voltage is induced it will create a current. What is the use of this current that was produced? Begin to _______

A. recharge the inductor

B. discharge the inductor

C. recharge the capacitor

D. discharge the capacitor

how many turns of solenoid is required to produce a magnetic field having magnitude of 3.0 T upon the application of 600A current if the solenoid is 8.50 m long and is having 4500 turns.  (note: \mu _(0)=4\pi x10^(-7)T. m/A).

determine the magnitude of a magnetic force produced on a straight wire 60.0 cm long when a 10.5 A current flow on it while being exposed on a 27.5 T magnetic field acting 90.0^(0) on the wire.

The temperature coefficient of copper is 0.00427/°C. The resistance of the coil is 8.82 ohms

at 24°.C. Determine its resistance at 0°.C and 42°.C.

What potential difference must be applied to cause a current of 2.5 A in a circuit to have a resistance of 53 ohms?

An aeroplane of mass 1.12 ×10^5 kg is accelerating constantly from rest along a runaway. Calculate the weight of the aeroplane. Name one of the two forces acting on the aeroplane apart from weight. The aeroplane starts from rest and after 50 seconds the aeroplane reaches a speed of 70m/s. Calculate the horizontal force on the aeroplane

A boy throws a baseball onto a roof and it rolls back down and off the roof with a speed of 3.80 m/s. If the roof is pitched at 24.0° below the horizon and the roof edge is 3.30 m above the ground, find the time the baseball spends in the air and the horizontal distance from the roof edge to the point where the baseball lands on the ground.

An object is placed 10 cm infront of a diverging lens of focal length 11cm. where is the image located?Is the image real or virtual? What is the magnification?

The velocity of a train changes from 0 to 60km/hr in 20 seconds. Assuming that it is

uniformly accelerated, what is the acceleration in m/s2?

2 meter of resistance wire of Cross section .5mm² has a resistance of 2.2ohm c calculate the resistivity of the meter