In the formula for magnetic deflection, fm is equal to qvb. match each symbol in this formula with what it represents.
1. deflecting force
b
2. charge
fm
3. velocity of the charge
q
4. perpendicular magnetic field strength
v

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft