Ohm's Law Multiple choice Question (Electrical Mcqs) and Answer Part 8
Electrical Engineering Objective Question and Answer
Q 141 to Q 142 refer to the data given below :
An electric circuit having passive element with instantaneous voltage three times the cube of instantaneous current through it.
141- If I= 0.1 A , the power dissipated in passive element is
(A) 3 W
(B) 0.3 W
(C) 3 x 12^-3 W
(D) 3 x 10^-4 W
Answer: (D)
142- if i = 10 A, The power dissipated will be
(A) 3 W
(B) 30 W
(C) 3 kW
(D) 30 kW
Answer: (D)
143- if R = 30 Kilo ohm and i = 0.5 mA , the conductance will be
(A) 15
(B) 30000
(C) 3.33 x 10^-5
(D) 3.33^ x 10^-3
Answer: (C)
144- The circuit has terminal voltage of
(A) 15 mV
(B) 1.5 V
(C) 15 V
(D) 150 V
Answer: (C)
145- How many electrons contribute to make 1.6 x 10^-19 Columbus of charge ?
(A) one
(B) one million
(C) 6.2 x 10^18
(D) 1.6 x 10^-19
Answer: (C)
146- The current at the terminal is given by
For the time t = 1 sec and t = 2 sec , the charge flowing will be
(A) 2.2 X 10^-6 C
(B) 1.6 x10^ -6 C
(C) 0.6 x10^-8 C
(D) 0.6 x 10^-10 C
Answer: (A)
147- If a electron moves from point A to point B and lose 1.6 x 10^-20 J energy. The potential at point B w.r.t A is
(A) -1 V
(B) + 1 V
(C) -0.1 V
(D) +0.1 V
Answer: (C)
148- A resistor has a resistance R as shown in the figure and if a same Resistor of 0.2 millimeter by 0.2 millimeter has a resistance of
(A) 4 R
(B) 2 R
(C) R
(D) R/2
Answer: (C)
149- Certain substances show their resistance at very low temperature , These substances are called,
(A) dielectric
(B) super- conductors
(C) semi conductors
(D) perfect conductors
Answer: (B)
150- If the three resistances are connected in parallel /series , to obtain an equivalent resistance , how many values can be obtained by different combinations of these resistances.
(A) Three
(B) Four
(C) Five
(D) Six
Answer: (B)
151- if R = 3 Kilo ohm and i = 0.3 mA , the conductance will be
(A) 30000 mho
(B) 30 mho
(C) 0.33 milli mho
(D) 30 micro mho
Answer: (C)
152-
Answer: (C)
153- An ohm meter reads an open resistor as
(A) Zero ohm
(B) high but with in tolerance
(C) low but not zero
(D) infinite
Answer: (D)
154- if R = 1 Mega ohm , 2 W and current of 1 mA flows through it , the power dissipated will be
(A) 2 W
(B) 1 W
(C) 0.5 W
(D) 0.1 W
Answer: (B)
155- The color code for a carbon resistor , if it is 10 Kilo ohm and have a tolerance of 20%
(A) Red , red , green and silver strips
(B) Yellow , violet, yellow and silver strips
(C) Orange , orange , black and Gold strips
(D) Brown , black , orange and no tolerance band
Answer: (D)
156- For a sophisticated design of an electric circuit , a resistor have to meet the following conditions
V = 5 V
Current = 100 mA
Safety factor for power dissipation : 2
(A) 5 ohm , 10 watt
(B) 0.5 ohm , 100 watt
(C) 5 ohm , 10 watt
(D) 50 ohm , 1 watt
Answer: (D)
Answer: (B)
Answer: (C)
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Answer: (D)
Answer: (A)
157- If R = 10 ohm , 10 W , the resistor may be
(A) carbon resistor
(B) wire wound resistor
(C) either carbon or wire wound resistor
(D) neither carbon nor wire wound resistor
Answer: (B)
158- If 2 resistor having value of 10 kilo ohm and 5 W are connected in parallel , the power ratio will be
(A) 2.5 W
(B) 5 W
(C) 10 W
(D) 25 W
Answer: (C)
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159- Which of the following is typical resistance and power dissipation value for a wire wound resistance
(A) 1 Mega ohm , 1/3 W
(B) 50 K ohm , 1/2 W
(C) 500 ohm , 1 W
(D) 10 ohm , 50 W
Answer: (D)
160- A 100 kilo ohm resistor with a 1 watt power rating is likely to be a
(A) carbon resistor
(B) wire wound resistor
(C) either carbon or wire wound resistor
(D) neither carbon or wire wound resistor
Answer: (A)
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