Alternating Voltage Across Different Elements
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PHXII07:ALTERNATING CURRENT

356001 A coil of self-inductance \({L}\) is connected in series with a bulb \({B}\) and an ac source. Brightness of the bulb decreases when

1 an iron rod is inserted in the coil
2 frequency of the ac source is decreased
3 number of turns in the coil is reduced
4 a capacitance of reactance \({X_{C}=X_{L}}\) is included in the same circuit
PHXII07:ALTERNATING CURRENT

356002 In an \(L-R\) circuit, the value of \(L\) is \(\left( {\frac{{0.4}}{\pi }} \right)H\) and the valueof \(R\) is \(30 \Omega\). If in the circuit, an alternating emf of \(200\;V\) at 50 cycle \(/ \mathrm{s}\) is connected, the impedance of the circuit and current will be

1 \(11.4 \Omega, 17.5 \mathrm{~A}\)
2 \(30.7 \Omega, 6.5 \mathrm{~A}\)
3 \(40.4 \Omega, 5 \mathrm{~A}\)
4 \(50 \Omega, 4\) A
PHXII07:ALTERNATING CURRENT

356003 An inductive coil has a resistance of \(100 \Omega\). When an \(A C\) signal of frequency \(1000\;Hz\) is applied to the coil, the voltage leads the current by \(45^{\circ}\). The inductance of the coil is

1 \(\dfrac{1}{10 \pi}\)
2 \(\dfrac{1}{20 \pi}\)
3 \(\dfrac{1}{40 \pi}\)
4 \(\dfrac{1}{60 \pi}\)
PHXII07:ALTERNATING CURRENT

356004 A \(100\,\Omega \) resistance is connected in series with a \(4\,H\) inductor. The voltage across the resistor is \({V_R} = 2\sin (1000\,t)V\). The voltage across the inductor is

1 \(80\sin \left( {1000\,t + \frac{\pi }{2}} \right)\)
2 \(40\sin \left( {1000\,t + \frac{\pi }{2}} \right)\)
3 \(80\sin \left( {1000\,t - \frac{\pi }{2}} \right)\)
4 \(40\sin \left( {1000\,t - \frac{\pi }{2}} \right)\)
PHXII07:ALTERNATING CURRENT

356005 A coil of self-inductance \(L\) is connected in series with a bulb \(B\) and an \(AC\) source. Brightness of the bulb decreases when

1 Number of turns in the coil is reduced
2 A capacitance of reactance \({X_C} = {X_L}\) is induced in the same circuit
3 Frequency of the \(AC\) source is decreased
4 An iron rod is inserted in the coil
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PHXII07:ALTERNATING CURRENT

356001 A coil of self-inductance \({L}\) is connected in series with a bulb \({B}\) and an ac source. Brightness of the bulb decreases when

1 an iron rod is inserted in the coil
2 frequency of the ac source is decreased
3 number of turns in the coil is reduced
4 a capacitance of reactance \({X_{C}=X_{L}}\) is included in the same circuit
PHXII07:ALTERNATING CURRENT

356002 In an \(L-R\) circuit, the value of \(L\) is \(\left( {\frac{{0.4}}{\pi }} \right)H\) and the valueof \(R\) is \(30 \Omega\). If in the circuit, an alternating emf of \(200\;V\) at 50 cycle \(/ \mathrm{s}\) is connected, the impedance of the circuit and current will be

1 \(11.4 \Omega, 17.5 \mathrm{~A}\)
2 \(30.7 \Omega, 6.5 \mathrm{~A}\)
3 \(40.4 \Omega, 5 \mathrm{~A}\)
4 \(50 \Omega, 4\) A
PHXII07:ALTERNATING CURRENT

356003 An inductive coil has a resistance of \(100 \Omega\). When an \(A C\) signal of frequency \(1000\;Hz\) is applied to the coil, the voltage leads the current by \(45^{\circ}\). The inductance of the coil is

1 \(\dfrac{1}{10 \pi}\)
2 \(\dfrac{1}{20 \pi}\)
3 \(\dfrac{1}{40 \pi}\)
4 \(\dfrac{1}{60 \pi}\)
PHXII07:ALTERNATING CURRENT

356004 A \(100\,\Omega \) resistance is connected in series with a \(4\,H\) inductor. The voltage across the resistor is \({V_R} = 2\sin (1000\,t)V\). The voltage across the inductor is

1 \(80\sin \left( {1000\,t + \frac{\pi }{2}} \right)\)
2 \(40\sin \left( {1000\,t + \frac{\pi }{2}} \right)\)
3 \(80\sin \left( {1000\,t - \frac{\pi }{2}} \right)\)
4 \(40\sin \left( {1000\,t - \frac{\pi }{2}} \right)\)
PHXII07:ALTERNATING CURRENT

356005 A coil of self-inductance \(L\) is connected in series with a bulb \(B\) and an \(AC\) source. Brightness of the bulb decreases when

1 Number of turns in the coil is reduced
2 A capacitance of reactance \({X_C} = {X_L}\) is induced in the same circuit
3 Frequency of the \(AC\) source is decreased
4 An iron rod is inserted in the coil
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PHXII07:ALTERNATING CURRENT

356001 A coil of self-inductance \({L}\) is connected in series with a bulb \({B}\) and an ac source. Brightness of the bulb decreases when

1 an iron rod is inserted in the coil
2 frequency of the ac source is decreased
3 number of turns in the coil is reduced
4 a capacitance of reactance \({X_{C}=X_{L}}\) is included in the same circuit
PHXII07:ALTERNATING CURRENT

356002 In an \(L-R\) circuit, the value of \(L\) is \(\left( {\frac{{0.4}}{\pi }} \right)H\) and the valueof \(R\) is \(30 \Omega\). If in the circuit, an alternating emf of \(200\;V\) at 50 cycle \(/ \mathrm{s}\) is connected, the impedance of the circuit and current will be

1 \(11.4 \Omega, 17.5 \mathrm{~A}\)
2 \(30.7 \Omega, 6.5 \mathrm{~A}\)
3 \(40.4 \Omega, 5 \mathrm{~A}\)
4 \(50 \Omega, 4\) A
PHXII07:ALTERNATING CURRENT

356003 An inductive coil has a resistance of \(100 \Omega\). When an \(A C\) signal of frequency \(1000\;Hz\) is applied to the coil, the voltage leads the current by \(45^{\circ}\). The inductance of the coil is

1 \(\dfrac{1}{10 \pi}\)
2 \(\dfrac{1}{20 \pi}\)
3 \(\dfrac{1}{40 \pi}\)
4 \(\dfrac{1}{60 \pi}\)
PHXII07:ALTERNATING CURRENT

356004 A \(100\,\Omega \) resistance is connected in series with a \(4\,H\) inductor. The voltage across the resistor is \({V_R} = 2\sin (1000\,t)V\). The voltage across the inductor is

1 \(80\sin \left( {1000\,t + \frac{\pi }{2}} \right)\)
2 \(40\sin \left( {1000\,t + \frac{\pi }{2}} \right)\)
3 \(80\sin \left( {1000\,t - \frac{\pi }{2}} \right)\)
4 \(40\sin \left( {1000\,t - \frac{\pi }{2}} \right)\)
PHXII07:ALTERNATING CURRENT

356005 A coil of self-inductance \(L\) is connected in series with a bulb \(B\) and an \(AC\) source. Brightness of the bulb decreases when

1 Number of turns in the coil is reduced
2 A capacitance of reactance \({X_C} = {X_L}\) is induced in the same circuit
3 Frequency of the \(AC\) source is decreased
4 An iron rod is inserted in the coil
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PHXII07:ALTERNATING CURRENT

356001 A coil of self-inductance \({L}\) is connected in series with a bulb \({B}\) and an ac source. Brightness of the bulb decreases when

1 an iron rod is inserted in the coil
2 frequency of the ac source is decreased
3 number of turns in the coil is reduced
4 a capacitance of reactance \({X_{C}=X_{L}}\) is included in the same circuit
PHXII07:ALTERNATING CURRENT

356002 In an \(L-R\) circuit, the value of \(L\) is \(\left( {\frac{{0.4}}{\pi }} \right)H\) and the valueof \(R\) is \(30 \Omega\). If in the circuit, an alternating emf of \(200\;V\) at 50 cycle \(/ \mathrm{s}\) is connected, the impedance of the circuit and current will be

1 \(11.4 \Omega, 17.5 \mathrm{~A}\)
2 \(30.7 \Omega, 6.5 \mathrm{~A}\)
3 \(40.4 \Omega, 5 \mathrm{~A}\)
4 \(50 \Omega, 4\) A
PHXII07:ALTERNATING CURRENT

356003 An inductive coil has a resistance of \(100 \Omega\). When an \(A C\) signal of frequency \(1000\;Hz\) is applied to the coil, the voltage leads the current by \(45^{\circ}\). The inductance of the coil is

1 \(\dfrac{1}{10 \pi}\)
2 \(\dfrac{1}{20 \pi}\)
3 \(\dfrac{1}{40 \pi}\)
4 \(\dfrac{1}{60 \pi}\)
PHXII07:ALTERNATING CURRENT

356004 A \(100\,\Omega \) resistance is connected in series with a \(4\,H\) inductor. The voltage across the resistor is \({V_R} = 2\sin (1000\,t)V\). The voltage across the inductor is

1 \(80\sin \left( {1000\,t + \frac{\pi }{2}} \right)\)
2 \(40\sin \left( {1000\,t + \frac{\pi }{2}} \right)\)
3 \(80\sin \left( {1000\,t - \frac{\pi }{2}} \right)\)
4 \(40\sin \left( {1000\,t - \frac{\pi }{2}} \right)\)
PHXII07:ALTERNATING CURRENT

356005 A coil of self-inductance \(L\) is connected in series with a bulb \(B\) and an \(AC\) source. Brightness of the bulb decreases when

1 Number of turns in the coil is reduced
2 A capacitance of reactance \({X_C} = {X_L}\) is induced in the same circuit
3 Frequency of the \(AC\) source is decreased
4 An iron rod is inserted in the coil
Join With Us for More Updates
PHXII07:ALTERNATING CURRENT

356001 A coil of self-inductance \({L}\) is connected in series with a bulb \({B}\) and an ac source. Brightness of the bulb decreases when

1 an iron rod is inserted in the coil
2 frequency of the ac source is decreased
3 number of turns in the coil is reduced
4 a capacitance of reactance \({X_{C}=X_{L}}\) is included in the same circuit
PHXII07:ALTERNATING CURRENT

356002 In an \(L-R\) circuit, the value of \(L\) is \(\left( {\frac{{0.4}}{\pi }} \right)H\) and the valueof \(R\) is \(30 \Omega\). If in the circuit, an alternating emf of \(200\;V\) at 50 cycle \(/ \mathrm{s}\) is connected, the impedance of the circuit and current will be

1 \(11.4 \Omega, 17.5 \mathrm{~A}\)
2 \(30.7 \Omega, 6.5 \mathrm{~A}\)
3 \(40.4 \Omega, 5 \mathrm{~A}\)
4 \(50 \Omega, 4\) A
PHXII07:ALTERNATING CURRENT

356003 An inductive coil has a resistance of \(100 \Omega\). When an \(A C\) signal of frequency \(1000\;Hz\) is applied to the coil, the voltage leads the current by \(45^{\circ}\). The inductance of the coil is

1 \(\dfrac{1}{10 \pi}\)
2 \(\dfrac{1}{20 \pi}\)
3 \(\dfrac{1}{40 \pi}\)
4 \(\dfrac{1}{60 \pi}\)
PHXII07:ALTERNATING CURRENT

356004 A \(100\,\Omega \) resistance is connected in series with a \(4\,H\) inductor. The voltage across the resistor is \({V_R} = 2\sin (1000\,t)V\). The voltage across the inductor is

1 \(80\sin \left( {1000\,t + \frac{\pi }{2}} \right)\)
2 \(40\sin \left( {1000\,t + \frac{\pi }{2}} \right)\)
3 \(80\sin \left( {1000\,t - \frac{\pi }{2}} \right)\)
4 \(40\sin \left( {1000\,t - \frac{\pi }{2}} \right)\)
PHXII07:ALTERNATING CURRENT

356005 A coil of self-inductance \(L\) is connected in series with a bulb \(B\) and an \(AC\) source. Brightness of the bulb decreases when

1 Number of turns in the coil is reduced
2 A capacitance of reactance \({X_C} = {X_L}\) is induced in the same circuit
3 Frequency of the \(AC\) source is decreased
4 An iron rod is inserted in the coil