FIGURE 18-17 3 5 12 V 10 Ii I2 I3 41) In Fig, 18-17, what is the value of the cu

Question

FIGURE 18-17 3 5 12 V 10 Ii I2 I3 41) In Fig, 18-17, what is the value of the current 12 A) 0.32 A B) 0.11 A C) 0.29 A D) 0.89 AE) 0.61 A 42) What is the index of refraction inside a certain transparent material if the critical angle is found to be 48.° (air is outside)? A) 1.35 43) A 4- resistor, an 8 resistor, and a 24- resistor are connected together. What is the maximum B) 1.48 C) 0.743 D) 1.22 E) 1.49 resistance that can be produced using all three resistors? A)288 B)36 C)96 D) 12 E)192 44) It takes 10.J of energy to move 2.0 C of charge from point A to point B. What is the potential difference between points A and B? A) zeroB) 0.20 V C)20. V D) 0.50V E)5.0 v 45) A 1 pF capacitor is connected in parallel with a 2 pF capacitor, the parallel combination then being connected in series with a 3 pF capacitor. The resulting equivalent capacitance is A)3 pF B)4.5 pF. 6 pF. D)5 pF. E1.5pF.

Explanation / Answer

42 ) Given , critical angle (C)= 48°

So , the refractive index of material is :

= 1/sin(C) = 1/sin(48°)

= 1.35

Answer) option A) 1.35

43 ) Maximum possible resistance when resistances are connected in series,

Req = R1 + R2 + R3

Req = 4 + 8 + 24 = 36 ohms

Answer) option B) 36 ohms

44) Given ,

W = 10 J , Q = 2 C

W = Q*V

V = W/Q = 10/2 = 5 V

Answer) option E)

45) 1 pF and 2 pF are connected in parallel

So , (Ceq) = 1+2 = 3 pF

Now the equivalent circuit is connected in series with 3 pF

So

Ceq = (3*3)/3+3 = 1.5 pF

Answer) option E)

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