Basic Electrical Engineering MCQs (Part-9)

What is the purpose of a multimeter?

A Measure current
B Measure voltage
C Measure resistance
D All of the above

What is the total resistance in a series circuit?

A Product of resistances
B Sum of individual resistances
C None of the above
D Reciprocal of resistances

In a parallel circuit, what happens to the total resistance when more resistors are added?

A It decreases
B It is zero
C It stays the same
D It increases

What is the function of an ammeter in an electrical circuit?

A Measure voltage
B Measure power
C Measure current
D Measure resistance

What is the primary function of a voltmeter?

A Measure current
B Measure voltage
C Measure power
D Measure resistance

Which of the following is used to measure electrical power?

A Wattmeter
B Ammeter
C Ohmmeter
D Voltmeter

What is the effect of adding more resistors in series?

A Voltage increases
B Current increases
C Total current decreases
D Total resistance increases

What happens in a short-circuit?

A Voltage decreases
B Current bypasses the load
C Resistance becomes infinite
D Current flows through a load

What is the main advantage of using a parallel circuit?

A Lower current
B Higher resistance
C Independent components
D Increased voltage

What is the function of a circuit breaker?

A Measure current
B Protect against overloads
C Increase current
D Control voltage

What does an open circuit indicate?

A No current flow
B Voltage drop across the load
C Complete current flow
D Current bypasses the load

What is the effect of increasing the number of resistors in a parallel circuit?

A Increase in total resistance
B Decrease in voltage
C Decrease in current
D Decrease in total resistance

Which instrument is used to measure resistance?

A Ammeter
B Ohmmeter
C Wattmeter
D Voltmeter

Which wiring system uses a common return wire for multiple devices?

A Ring circuit
B Series circuit
C Parallel circuit
D Ring circuit

What happens to the total current in a series circuit?

A It stays the same
B It increases
C It decreases
D It is zero