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Consider an RL circuit with resistance 36 Ω and inductance 240 mH placed in series.
(a) If a 9-V battery is connected to the circuit, how long would it take the current to reach 10 mA?
(b) What is the voltage drop across the inductor at this time?
how many electrons must be removed from each of two 4.3-kg copper spheres to make the electric force of repulsion
A 8-kg block is set moving with an initial speed of 6 m/s on a rough horizontal surface. If the force of friction is 12 N, approximately how far does the block travel before it stops?
A small hole is drilled in a meter stick is toact as a pivot. The meter stick swings in a short arc as a physical pendulum. How far from the center of mass should the pivot point befor a period of 2.00 seconds?
A convex lens is held over a piece of paper outdoors on asunny day. When the paper is held 26 {\rm cm} below the lens, the sunlight is focused on the paper and the paperignites. What is the focal length of the lens?
A wire carries a current of 6.0 A in a direction that makes an angle of 36.0° with the direction of a magnetic field of strength 0.300 T. Compute the magnetic force on a 7.00-m length of the wire.
An oil droplet with 13.0 excess electrons is observed between two parallel electrodes spaced 11.0mm apart. What is the radius of the droplet
A ball of mass m is suspended from a rope of length R. the ball is set into freely swinging circular motion in a vertical plane. Find the centripetal acceleration of the ball at the bottom of the circle
A 45% efficient device uses chemical energy to generate 420 J of electric energy. How much chemical energy is used? A second device uses twice much chemical energy to generate half as much electric energy. What is its efficiency?
The resonant frequency of a series RCL circuit is 13.8 kHz. The inductance and capacitance of the circuit are each quadrupled. What is the new resonant frequency
An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. estimate the magnitudes of the net force acting on electron
A scientist is running at speed, u, toward a large, smooth wall while holding a tuning fork that vibrates at frequency, f. what is the beat frequency she hears
question a rectangular loop of copper wire of resistance r has width a and length b. the loop is stationary in a
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