HARD
12th West Bengal Board
IMPORTANT
Earn 100

An inductor 200 mH, a capacitor C and resistor 10Ω are connected in series with 100 V, 50 Hz ac source.If the current and voltage are in phase with each other, calculate the capacitance of the circuit.

Important Questions on Transient Current and Alternating Current

HARD
12th West Bengal Board
IMPORTANT

What should be the frequency of alternating 200 V so as to pass a maximum current 0.9 A through an inductance of 1 H.

 

HARD
12th West Bengal Board
IMPORTANT

A sinusoidal voltage of peak value 283 V and frequency 50 Hz is applied to a series LCR circuit in which R=3 ΩL=25.48 mH and C=796 μF. The impedance of the circuit.

MEDIUM
12th West Bengal Board
IMPORTANT

A sinusoidal voltage of peak value 283 V and frequency 50 Hz is applied to a series LCR circuit in which R=3 Ω, L=25.48 mH and C=796 μF.

Calculate the phase-difference between the voltage across the source and the current,

MEDIUM
12th West Bengal Board
IMPORTANT

A sinusoidal voltage of peak value 283 V and frequency 50 Hz is applied to a series LCR circuit in which R=3 Ω, L=25.48 mH and 

C=796 μF. Calculate the power dissipated in the circuit.

MEDIUM
12th West Bengal Board
IMPORTANT

A sinusoidal voltage of peak value 283 V and freqnecy 50 Hz is applied to a series LCR circuit in which R=3 ΩR=3 Ω, L=25.48 mHL=25.48 mH and C=796 μF.

(d) the power factor.

HARD
12th West Bengal Board
IMPORTANT
In an ideal transformer, the number of turns in primary and secondary are 100 and 2000 respectively. If maximum voltage in primary is 120 V, what is the maximum voltage in the secondary ?
EASY
12th West Bengal Board
IMPORTANT

In an ideal transformer, number of turns in the primary and secondary are 200 and 1000 respectively. If the power input to the primary is 10 kW at 200 V, Calculate output voltage.

MEDIUM
12th West Bengal Board
IMPORTANT

In an ideal transformer, number of turns in the primary and secondary are 200 and 1000 respectively. If the power input to the primary is 10 kW at 200 V, Calculate 

(b) current in the primary ?