. 2018 the resuh of elength is oy 62. Of the followine, the e F intrared Tigst u

Question

. 2018 the resuh of elength is oy 62. Of the followine, the e F intrared Tigst uliwaviolet lighe called quanta, was 61. The concept that sibrating emie light in discrete amounts of energy A Mawell B. Tinstein C New on Young E.) Planck being rubbed with a wool cloth, and the charge is 64. A rubber balloon has become measured as 2 x 1O C. ecording to this charge, the balloon contains an xess to A. 1.25 X 10 B. 1.25 X10 C. 12.5 x 10 D. 12.5 X 10" uit. What is the resistance of the toaster? Tt 0o current or IA through a toaster connected to a 1 A. 1.200 ? B. 21.82 ? C. 120.012 D. 2.182 ? 66. A 15 ohm toster is turned on in a circuit that already has a 025 hp motor, thr electric A, 16A B. 15? C. 120 A D. 746 W iron that are on. What is the total current? SA on that are on what inthetotal that already has?0.25 hp motor, three 75W lightbulbs, and assow Page 12 o

Explanation / Answer

64.

Q = n*e

n = Q/e = 2*10^-14/(1.6*10^-19)

n = 125000 excess electrons = 1.25*10^5

Correct option is A

65.

Using ohm's law:

V = i*R

R = V/i = 120/1 = 120 ohm

Correct option is C.

66.

Power is given by:

P = i^2*R = V*i

Also, V = i*R

for household uses, Voltage = 120 V

for toaster

i = V/R = 120/15 = 8 Amp

For rest of the elements

P = Total power = 0.25 hp + 75*3 + 550 W

1 hp = 745.7 W,

0.25 hp = 186.4 W

P = 186.4 + 225 + 550 = 961.4 W

i = P/V = 961.4/120 = 8.01

total current = 8 + 8 = 16.0 Amp

Correct option is A.

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