#### Electrical engineering

• ( 1 ) All the voltage drops and the source voltage added together in a series circuit is equal to

• 1) the total of the source voltage and the voltage drops
• 2) zero
• 3) the source voltage
• 4) the total of the voltage drops
• Discussion in forum
Solution : All the voltage drops and the source voltage added together in a series circuit is equal to zero

discussion

• ( 2 ) A device that opens and closes a circuit is a __________.

• 1) conductor
• 2) switch
• 3) volt
• 4) electrical current
• Discussion in forum
Solution : A device that opens and closes a circuit is a volt.

discussion

• ( 3 ) A voltmeter should be connected to a circuit in __________.

• 1) series
• 2) short form
• 3) series-parallel
• 4) parallel
• Discussion in forum
Solution : A voltmeter should be connected to a circuit in parallel.

discussion

• ( 4 ) A circuit that has only one electric flow is _________.

• 1) parallel circuit
• 2) series circuit
• 3) battery circuit
• 4) paper circuit
• Discussion in forum
Solution : A circuit that has only one electric flow is series circuit.

discussion

• ( 5 ) In a parallel circuit containing set of bulbs, if one of the bulb blew up the effective resistance offered will:

• 1) Fluctuate
• 2) Decrease
• 3) Increase
• 4) Remains same
• Discussion in forum
Solution : In a parallel circuit containing set of bulbs, if one of the bulb blew up the effective resistance offered will Increase

discussion

• ( 6 ) Which of the following quantity remains in parallel circuit:

• 1) Voltage
• 2) Current and Voltage
• 3) Current
• 4) none of these
• Discussion in forum
Answer : 2) Current and Voltage
Solution : Current and Voltage remains in parallel circuit

discussion

Answer : 2) Current and Voltage

• ( 7 ) The total power in a certain circuit is 12 W. Each of the four equal-value series resistors making up the circuit dissipates

• 1) 3 W
• 2) 8 W
• 3) 12 W
• 4) 48 W
• Discussion in forum
Solution : Total power p = 12
All equal value resistors so
p= p1 = p2 = p3 = p4
total power p = p + p + p + p
12 = 4p
p = 12/4
p = 3 w

discussion

• ( 8 ) To measure the current out of the second resistor in a circuit consisting of four resistors, an ammeter can be placed

• 1) between the second and third resistors
• 2) at the negative terminal of the source
• 3) between the third and fourth resistors
• 4) at any point in the circuit
• Discussion in forum
Answer : 4) at any point in the circuit
Solution : To measure the current out of the second resistor in a circuit consisting of four resistors, an ammeter can be placed at any point in the circuit

discussion

Answer : 4) at any point in the circuit

• ( 9 ) What determines the total resistance in a series circuit?

• 1) the sum of the resistors
• 2) the largest resistor minus the smaller
• 3) the smallest resistor
• 4) the largest resistor
• Discussion in forum
Answer : 1) the sum of the resistors
Solution : The sum of the resistors determines the total resistance in a series circuit.

discussion

Answer : 1) the sum of the resistors

• ( 10 ) If two resistors have the same voltage drop in a series circuit, it means:

• 1) they are of unequal value
• 2) they are connected in parallel
• 3) the voltage has doubled
• 4) they are of equal value
• Discussion in forum
Answer : 4) they are of equal value
Solution : If two resistors have the same voltage drop in a series circuit, it means they are of equal value.

discussion

Answer : 4) they are of equal value