Bridges MCQs | AC Bridges MCQs

31. Schering bridges are used for the measurement of

1. Unknown capacitance
2. Dielectric loss
3. Power factor
4. All of these

32. The bridge suitable for the measurement of capacitance is /are

1. Anderson’s bridge
2. Hay’s bridge
3. Owen’s bridge
4. None of these

33. The Schering bridges can be used at

1. low voltage
2. high voltage
3. medium voltage
4. both (a) and (b)

34. If δ is the loss angle then the dissipation factor is given by

1. sin δ
2. cos δ
3. tan δ
4. cot δ

35. The dielectric loss of a pure capacitor is equal to

1. 1
2. 0
3. Maximum
4. None of these

36. Anderson bridges are suitable for the measurement of

1. Resistance
2. Inductance
3. Capacitance
4. All of these

37. The Hay’s bridge is suitable for the measurement of inductances of coils with Q factor

1. More than 10
2. Less than 1
3. More than 1
4. Less than 10

38. If C₄ is the capacitance and R₄ is the resistance of Hay’s bridge, then the Q-factor of Hay’s bridge is given by

1. 1 / ωC₄R₄
2. ωC₄R₄
3. ωC₄ / R₄
4. ωR₄ / C₄

39. At 2 MHz, the resonance is obtained with a resonating capacitance value of 12 pF and at 400 kHz, the resonance is obtained with resonating capacitance value of 320 pF. Then the self-capacitance of the coil is

1. 0.62 pF
2. 0.83 pF
3. 1.2 pF
4. 1.5 pF

40. Shielding of the capacitor is done to

1. Make the value of capacitor definite
2. Balance the bridge without any problem
3. Both (a) and (b)
4. None of these