Bridges MCQs | AC Bridges MCQs

16. When is the bridge circuit balanced?

1. When voltage is applied
2. When current flows through the opposite ends of the bridge circuit
3. When no current flows through the galvanometer
4. When impedance is minimum

17. Tuned detectors are used in the frequency range of

1. 1 Hz to 100 Hz
2. 10 Hz to 100 Hz
3. 1 kHz to 100 kHz
4. 1 MHz to 100 MHz

18. The accuracy of a bridge depends on the

1. null indicator
2. bridge components
3. current source
4. voltage source

19. For single frequency value, the most sensitive detector is ________

1. tuned detector
2. vibration galvanometer
3. headphone
4. oscillator

20. What is the frequency range for a headphone as a detector?

1. 20 Hz to 20 kHz
2. 10 kHz to 1 MHz
3. 10 MHz to 1 GHz
4. 250 Hz to 4 kHz

21. Which principle operates a bridge circuit?

1. null indication
2. ampere’s rule
3. partial indication
4. kirchhoff’s laws

22. At high frequency, source consists of

1. amplifiers
2. regulators
3. oscillators
4. op amps

23. A bridge circuit uses which method of measurement?

1. absolute
2. relative
3. differential
4. comparison

24. A simple bridge circuit consists of a network of

1. 3 resistance arms
2. 2 resistance arms
3. 4 resistance arms
4. 6 resistance arms

25. A bridge circuit is used for the measurement of which of the following components?

1. Resistance, capacitance, and inductance
2. Diode, triode, and thyristor
3. Transistor, thermistor, and antenna
4. LED, op amp, and transducer

26. The vibration galvanometer used as detector, it responds

1. Only to the fundamental frequency
2. Only to the harmonics frequency
3. Both (a) and (b)
4. Does not respond to any frequency

27. The Maxwell’s Inductance-Capacitance bridge is not suitable for the measurement inductance of coil if the Q factor is

1. Less than 1
2. Between 1 to 10
3. More than 10
4. Both (a) and (c)

28. In Maxwell’s Inductance-Capacitance bridge, the frequency ω

1. Is directly proportional to the inductance in the balanced equation
2. Is inversely proportional to the capacitance in the balanced equation
3. Is directly proportional to the product of inductance and capacitance
4. Does not appear in the balanced equations

29. Under balanced condition, the current flowing through the detector is equal to

1. 1 A
2. 0 A
3. Sum of the currents flowing in the adjacent arms
4. Difference between the current flowing in the adjacent arms

30. The Ac Bridge used for the measurement of inductance is/are

1. Maxwell’s inductance bridge
2. Hay’s bridge
3. Anderson’s bridge, Owen’s bridge
4. All of these