A solenoid has 450 loops, each of radius 0.0254 m. The field increases from O T to 3.00 T in 1.55 s. What is the EMF generated in the coil?

massxgravity x heght=weightxheight= pe

4900=490xh

h=10

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

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y