Question

QUESTION 6

1. The time constant in an RC circuit is the time it takes

a. so that the current reaches its maximum value

b. so that the capacitor is fully charged.

C. in which the current decreased 37% of its initial value.

d. so that the current drops to zero.

QUESTION 7

1. A charged particle is fired at a speed of 5.2x10 ^ 4 m / s at an angle of 35 degrees to a magnetic field of 0.0045 T. If the magnetic field exerts a force of 0.0026 N on the particle, determine the magnitude of the load.

a. 15 microC

b. 27 microC

C. 11 microC

d. 23 microC

e. 19 microC

QUESTION 8

1. A computer monitor uses 2 A of current and is connected to a 120 V receptacle. The monitor never turns off. Determine the annual cost of operating the monitor if the cost of electricity is 12 cents per kWh.

a. 98 dollars

b. 250 dollars

C. 21 dollars

d. 14 dollars

e. 170 dollars

QUESTION 9

1. An electron travels rapidly 3.5x10 ^ 5 m / s when a 0.60 T magnetic field is enclosed. The direction of the magnetic field forms an angle of 60 degrees to the speed of the electron. Determine the magnitude of the force on the electron.

a. 3.4x10 ^ -14 N

b. 4.9x10 ^ -13 N

C. 2.9x10 ^ -14 N

d. 3.2x10 ^ -13 N

e. 1.7x10 ^ -13 N

QUESTION 10

1. A current of 5 A is maintained in a simple circuit consisting of a resistance between the terminals of an ideal battery. If the battery supplies power at the rate of 20 W, determine the value of the resistance.

a. 0.4 ohms

b. 4 ohms

C. 2 ohms

d. 0.8 ohms

e. 8 ohms

Answer 1