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A spring with a spring constant of 6.2 N m−1 is used to launch a 5.0 g slider along a frictionless track as shown in the figure above. The spring is compressed by 16 cm.
To what height h above the height labeled 0 m in the figure does the slider reach? (in m to 2 s.f)
A proton moves through a uniform magnetic field of magnitude 2.0 μT = 2.0
x 10^-6 T at a speed of 5.00 x 10^6 m/s.
(a) What is the magnitude of maximum
magnetic force it can experience?
(b) If the proton is replaced by an electron,
will it experience the same maximum force?
A charge of 6x10-7C is transferred from infinity to point A. If the work done to do this is 1.2x10-5J what is the potential point A
What should be the length of an ideal solenoid consisting of 1250 turns for
the magnetic field in its interior to be 0.025 T?
A current of 2.0 A is flowing
through the solenoid.
Two parallel wires are separated by a distance of 0.05 m. Wire 1 carries a
carries current of 12.0 A. Wire 2 carries a current of 6.0 A flowing in the
opposite direction as shown in the illustration.
Find the
(a) magnitude and
direction of the magnetic field created by wire 1 at wire 2,
(b) force exerted
by wire 1 on the 2.0 m long section of wire 2, and
(c) force exerted by wire 2
on wire 1.
A 2.0 centimeter tall object id placed 30.0 centimeters from a concave mirror. The focal length of the mirror is 10.0 centimeters. (a) where is thr image seen? (b) how tall is the image?
Three 45-Ω lightbulbs and three 75-Ω lightbulbs are connected in series. (a) what is the total resistance of the circuit? (b) what is their resistance if all six are wired in parallel? (c) Show the circuit illustration.
Three resistors R1=2.0Ω, R2=12.0Ω, and R3=8.0Ω are connected in series with a 9.0-V battery. (a) Show the illustration (b) Calculate the current in the circuit and show that the sum of all voltage changes around the circuit is zero.
A 3.00-µF and 4.00-µF capacitor are connected in series, and this combination is connected in parallel with a 2.00-µF capacitor. (a) Show the illustration (b) What is the net capacitance?
Eight 7.0-W Christmas tree lights are connected in series to each other and to a 110-V source. (a) Show the illustration (b) What is the resistance of each bulb?
