Related Questions

The capacitance C is charged through a resistance R. The time constant of the charging circuit is given by
A $$\frac{{\text{C}}}{{\text{R}}}$$
B $$\frac{{\text{1}}}{{{\text{RC}}}}$$
C $${\text{RC}}$$
D $$\frac{{\text{R}}}{{\text{C}}}$$
The time constant and R-C circuit may also be defined as the time during which the charging current falls to ______ percent of its initial maximum value,
A 37
B 42
C 63
D 73
পাত-দূরত্ব d এবং ধারকত্ব C. এমন একটি সমান্তরাল পাত ধারকের পাত দুটির মাঝখানে d/2 পুরুত্ববিশিষ্ট একটি ধাতব পাত স্থাপন করা হলো। নতুন ধারকত্ব কত হবে? (A metal plate of thickness d/2 is inserted between the plates of a parallel plate capacitor with plate separation d and capacitance C. What is the new capacitance?)
A C/d
B C/2
C 4Cd
D 2c
A capacitance is a circuit component that opposes the change in circuit
A current
B voltage
C impedance
D none of the above
A Thevenin ac equivalent circuit always consists of an equivalent ac voltage source and an equivalent capacitance.
A True
B False
Time constant of a circuit is the time in seconds taken after the application of voltage to each
A 25% of maximum value
B 50% of maximum value
C 63% of maximum value
D 90% of the maximum value
The time constant of a first order process with resistance R and capacitance C is
A R + C
B R - C
C RC
D $$\frac{1}{{{\text{RC}}}}$$
A farad is defined as the amount of capacitance necessary for:
A dissipating 1 W of power
B causing an ac phase shift greater than 90 degree
C storing 1 V for 1 second
D changing the voltage on the plates at the rate of 1 V per second when 1 A of current is flowing
E None of the above
To tune a parallel resonant circuit to a higher frequency, the capacitance should be
A Increased
B Decreased
C Left alone
D Replaced with inductance
In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value
A Will change the maximum value of current at resonance
B Will change the resonance frequency
C Will change the impedance at resonance frequency
D Will increase the selectivity of the circuit

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