Parallel Circuit - 7

A Parallel circuit has certain characteristics and basic rules: A parallel circuit has two or more paths for current to flow through. Voltage is the same across each component of the parallel circuit. The sum of the currents through each path is equal to the total current that flows from the source.

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This set of Basic Electrical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Parallel Networks” Set-7.

43. If two 4 Ohm resistors are connected in parallel the effective resistance of the circuit is:

(a)  8 Ohm

(b)  4 Ohm

(c)  2 Ohm

(d)  1 Ohm

Answer: c

44.  The effect of connecting an additional parallel load to an electrical supply source is to increase the:

(a)  resistance of the load

(b)  voltage of the source

(c)  current taken from the source

(d)  p.d. across the load

Answer: c

45.  The equivalent resistance when a resistor of 13 Ohm is connected in parallel with a  

     14 Ohm resistance is:

(a)  17 Ohm

(b)  7 Ohm 

(c)  112 Ohm

(d)  34 Ohm

Answer: a

46 A 10 Ohm resistor is connected in parallel with a 15 Ohm resistor and the

     combination in series with a 12 Ohm resistor. The equivalent resistance of the circuit 

     is:

(a)  37 Ohm

(b)  18 Ohm

(c)  27 Ohm

(d)  4 Ohm

Answer: b

47.  When three 3 Ohm resistors are connected in parallel, the total resistance is:

(a)  3 Ohm

(b)  9 Ohm

(c)  1 Ohm

(d)  0.333 Ohm

Answer: c

48.  The total resistance of two resistors R1 and R2 when connected in parallel is given by:

(a)  R1+R2

(b)  1 / R1+1 / R2

(c)  R1+R2 / R1R2

(d)  R1R2 / R1+R2

Answer: d

 

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Parallel Circuit - 6

A Parallel circuit has certain characteristics and basic rules: A parallel circuit has two or more paths for current to flow through. Voltage is the same across each component of the parallel circuit. The sum of the currents through each path is equal to the total current that flows from the source.

This set of Basic Electrical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Parallel Networks” Set-6.

36. What is RT for a 12 k, a 4 k, and a 3 k resistor in parallel?

a)  1.5 k

b)  2 k

c)  6.3 k

d)  19 k

Answer: A

37. What is the total resistance of four 1 k parallel-connected resistors?

a)  200 ohms

b)  250 ohms

c)  400 ohms

d)  4 K.ohms

Answer: B

38. Which are the better test devices used to isolate a suspected open component within  

      a parallel circuit?

a)  a voltmeter or an ohmmeter

b)  neither an ammeter nor a voltmeter

c)  a wattmeter or a voltmeter

d)  an ammeter or an ohmmeter

Answer: D

39. What is RT for fifteen 2 M resistors all connected in parallel?

a)  133 k

b)  300 k

c)  750 k

d)  30 M

Answer: A

40. Which is considered to be the common reference for a parallel circuit?

a)  Voltage

b)  Current

c)  Power

d)  Resistance

Answer: A

41. The output of a certain voltage divider is 12 V with no load. When a load is

       connected, the output voltage

 a)   remains the same

 b)  increases

 c)  becomes zero

 d)  decreases

Answer: d

42. If two 4 Ohm resistors are connected in series the effective resistance of the circuit is:

(a)  8 Ohm

(b)  4 Ohm

(c)  2 Ohm

(d)  1 Ohm

Answer: a

  

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