Physics Magnetism,Magnetic Effects Of Current Level: Misc Level
A 9.0- cm- diameter circulater loop of wire is in a 1.60-T magnetic field. The loop is removed from the field in 0.25 s. What is the average induced emf?
Physics Modern Physics Level: Misc Level
Protons move in a circle of radius 6.90 cm in a 0.510- T magnetic field. what value of electric field could make their paths straight?
Physics Current Electricity Level: Misc Level
If the restoring spring of a galvanometer weakens by 18% over the years, what current will give full -scale deflection if it originally required 36:A?
Physics Magnetism,Magnetic Effects Of Current Level: Misc Level
A single square loop of wire 12.0 cm on a side is placed with its face parallel to the magnetic field between the pole pieces of a large magnet . when 8.10 A flows in the coil , the torque on it 0.355 m:*N.
What is the magnetic field strength?
Physics Magnetism,Magnetic Effects Of Current Level: Misc Level
A positive charge and a negative charge held near each other are released. As they move, the force on each particle a. increases b. decreases c.stays the same.
Physics Magnetism,Magnetic Effects Of Current Level: Misc Level
The magnetic north pole of the Earth is nearest a. the Hudson Bay region of Canada b. Australia c. bothof these
Physics Modern Physics Level: Misc Level
Two charged particles repel each other with a force F. If the charge of one of the particles is doubed and the distance between them is also doubed, then the force will be a. F b. 2F c.F/2 d.F/4 e. none of these
Physics Wave Optics Level: Misc Level
The worst thing you can do for a health of a green -leafed plant is to illuminate it with only a. red light b.green c.blue light d. all are equally naughty
Physics Wave Optics Level: Misc Level
The color of an opaque object is the same as the light that is a. transmitted b. absorbed c.reflected d.all of these e. none of these
Physics Wave Optics Level: Misc Level
What is the frequency of an electromagnetic wave that has a wavelenght of 300,000 km? a. less than 1 Hz.b. more than 1 Hz. c, 1 Hz
Physics Current Electricity Level: Misc Level
If you plug an electric toaster rated at 110 V into a 220-V outlet, the current in the toaster will be about a. half what it should be b. the same as if it were plugged into 110 V. c. twice what it should be d. more than twice what it should be
Physics Modern Physics Level: Misc Level
A proton and electron are placed in an electric field. Which undergoes the greater acceleration?a. both accelerate equally b. proton c. Electron d. Neither accelerates
Physics Waves And Oscillations Level: Misc Level
Double the frequency of sound and you also double its a.wavelength b. speed c. amplitude d. all of these e. non of these
Physics Waves And Oscillations Level: Misc Level
Unlike a transverse wave, a longitudinal wave has a. no amplitude b. no frequency c. no wavelength d. no speed e.....a longitudinal wave has all of these
Physics Wave Optics Level: Misc Level
The dark lines in the Sun ,s spectrum represent light that is a. absorbed by the Sun ,s atomsphere b. emitted by the sun c. not emitted by the sun
