A 500-turn circular loop 15.0 cm in diameter is initially aligned so that its axis is parallel to the Earth's magnetic field. In 2.77 ms the coil is flipped so that its axis is perpendicular to the Earth's field. If a voltage of 0.166 V is induced in the coil, what is the value of the Earth's magnetic field?
5.20 × 10^-5 T
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Circular Motion of Charges: A charged particle of mass 0.0040 kg is subjected to a 4.0-T magnetic field which acts at a right angle to its motion. If the particle moves in a circle of radius 0.10 m at a speed of 2.0 m/s, what is the magnitude of the charge on the particle?
A. 0.020 C B. 50 C C. 0.00040 C D. 2500 C
A long solenoid has a radius of 4.0 cm and has 800 turns/m. If the current in the solenoid is increasing at the rate of 3.0 A/s, what is the magnitude of the induced electric field at a point 2.2 cm from the axis of the solenoid?
a. 3.3 × 10^-5 V/m b. 3.6 × 10^-5 V/m c. 3.9 × 10^-5 V/m d. 4.2 × 10^-5 V/m e. 6.0 × 10^-5 V/m
The ______________ distance is used in calculating work
a. normal b. square of c. perpendicular d. parallel
A compound lens is made by joining the plane surfaces of two thin plano-convex lenses of different glasses. The radius of curvature of each convex surface is 80 cm. The indices of refraction of the two glasses are 1.50 and 1.60
What is the focal length of the compound lens? A) 71 B) 75 C) 67 D) 69 E) 73