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3. In Figure 2, what is the direction of the current induced in the resistor at the instant the switch is closed? ㄐㄧ - Figure 2 4. If a grandfather clock were running slow, how could we adjust the length of the pendulum to correct the time?
4. A 2.00 C charged 1.00 g cork ball is suspended vertically on a 0.500 m long light string in the presence of a uniform downward-directed electric field of magnitude E-1.00x10 N/C. If the ball is displaced slightly from the vertical, it oscillates like a simple pendulum. (a) Determine the period of the balls oscillation. (b) Should gravity be included in the calculation for part (a)? Explain. (15)
Part 3. Problems (Total 50 mar deep swimming pool sends a ray upward a 4.00 m strikes deep s Aslight on the t0 rom upward e point and at an angle so that the ray stat angle (in air) does the emerging ray make with the directly above the flashlight. waters surface? (10) 2. In Figure 3, the cube is 40.0 cm on each edge. Four straight segments o re-ab in the direction f w be, ad, and de--forn a closed loop that carries a current 1 -5.00 A in shown. A uniform magnetic field of magnitude B-0.0200T is direction. Determine segment. (10) in the positive the magnitude and direction of the magnetic force on each Figure3
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