61. In R-L-C series resonant circuit magnitude of resonance frequency can be changed by changing the value of
62. Which of the following circuit component opposes the change in the circuit voltage ?
63. For the same peak value, which of the following wave has the least mean value?
64. In a sine wave the slope is constant
65. For the same peak value which of the following wave will 'have the highest r.m.s. value?
66. In a R-L-C circuit
67. Inductance of coil
68. Power factor of the following circuit will be unity
69. The voltage of domestic supply is 220 V. This figure represents
70. A parallel AC. circuit in resonance will
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