Power in AC Circuits
« Previous Topic: Miscellaneous Problems on Alternating Current Next Topic: Resonance in Series LCR Circuit »
PHXII07:ALTERNATING CURRENT

356213 Statement A :
In a purely inductive or capacitive circuit, the current is referred to as wattless current.
Statement B :
No power is dissipated in a purely inductive or capacitive circuit even though a current is flowing in the circuit.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
PHXII07:ALTERNATING CURRENT

356215 A coil has an inductance of \(0.7H\) and is joined in series with a resistance of \(220\Omega \). When an alternating emf of \(220V\) at \(50cps\) is applied to it, then the wattless component of the current in the circuit is

1 \(7\,A\)
2 \(0.7\,A\)
3 \(5\,A\)
4 \(0.5\,A\)
PHXII07:ALTERNATING CURRENT

356216 The r.m.s. current in an \(AC\) circuit is 2\(A\). If the wattless current be \(\sqrt 3 A\), what is the power factor?

1 \(\frac{1}{{\sqrt 2 }}\)
2 \(\frac{1}{{\sqrt 3 }}\)
3 \(\frac{1}{3}\)
4 \(\frac{1}{2}\)
PHXII07:ALTERNATING CURRENT

356217 Current in the circuit is wattless, if

1 Resistance in the circuit is zero
2 Inductance in the circuit is zero
3 Resistance and inductance both are zero
4 Current is alternating
PHXII07:ALTERNATING CURRENT

356214 Match the following

Column IColumn II
A. Resistive circuitR. Maximum power dissipation
B. Purely inductive or capacitive circuitQ. Wattless current
C. Power dissipated at resonance in L-C-R circuitP. No dissipation

1 A - Q, B - P, C - R
2 A - R, B - Q,P, C - R
3 A - P, B - Q, C - R
4 A - P, B - R, C - Q
Join With Us for More Updates
PHXII07:ALTERNATING CURRENT

356213 Statement A :
In a purely inductive or capacitive circuit, the current is referred to as wattless current.
Statement B :
No power is dissipated in a purely inductive or capacitive circuit even though a current is flowing in the circuit.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
PHXII07:ALTERNATING CURRENT

356215 A coil has an inductance of \(0.7H\) and is joined in series with a resistance of \(220\Omega \). When an alternating emf of \(220V\) at \(50cps\) is applied to it, then the wattless component of the current in the circuit is

1 \(7\,A\)
2 \(0.7\,A\)
3 \(5\,A\)
4 \(0.5\,A\)
PHXII07:ALTERNATING CURRENT

356216 The r.m.s. current in an \(AC\) circuit is 2\(A\). If the wattless current be \(\sqrt 3 A\), what is the power factor?

1 \(\frac{1}{{\sqrt 2 }}\)
2 \(\frac{1}{{\sqrt 3 }}\)
3 \(\frac{1}{3}\)
4 \(\frac{1}{2}\)
PHXII07:ALTERNATING CURRENT

356217 Current in the circuit is wattless, if

1 Resistance in the circuit is zero
2 Inductance in the circuit is zero
3 Resistance and inductance both are zero
4 Current is alternating
PHXII07:ALTERNATING CURRENT

356214 Match the following

Column IColumn II
A. Resistive circuitR. Maximum power dissipation
B. Purely inductive or capacitive circuitQ. Wattless current
C. Power dissipated at resonance in L-C-R circuitP. No dissipation

1 A - Q, B - P, C - R
2 A - R, B - Q,P, C - R
3 A - P, B - Q, C - R
4 A - P, B - R, C - Q
For More Updates join with Us
PHXII07:ALTERNATING CURRENT

356213 Statement A :
In a purely inductive or capacitive circuit, the current is referred to as wattless current.
Statement B :
No power is dissipated in a purely inductive or capacitive circuit even though a current is flowing in the circuit.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
PHXII07:ALTERNATING CURRENT

356215 A coil has an inductance of \(0.7H\) and is joined in series with a resistance of \(220\Omega \). When an alternating emf of \(220V\) at \(50cps\) is applied to it, then the wattless component of the current in the circuit is

1 \(7\,A\)
2 \(0.7\,A\)
3 \(5\,A\)
4 \(0.5\,A\)
PHXII07:ALTERNATING CURRENT

356216 The r.m.s. current in an \(AC\) circuit is 2\(A\). If the wattless current be \(\sqrt 3 A\), what is the power factor?

1 \(\frac{1}{{\sqrt 2 }}\)
2 \(\frac{1}{{\sqrt 3 }}\)
3 \(\frac{1}{3}\)
4 \(\frac{1}{2}\)
PHXII07:ALTERNATING CURRENT

356217 Current in the circuit is wattless, if

1 Resistance in the circuit is zero
2 Inductance in the circuit is zero
3 Resistance and inductance both are zero
4 Current is alternating
PHXII07:ALTERNATING CURRENT

356214 Match the following

Column IColumn II
A. Resistive circuitR. Maximum power dissipation
B. Purely inductive or capacitive circuitQ. Wattless current
C. Power dissipated at resonance in L-C-R circuitP. No dissipation

1 A - Q, B - P, C - R
2 A - R, B - Q,P, C - R
3 A - P, B - Q, C - R
4 A - P, B - R, C - Q
NEET DIGITAL LIBRARY
PHXII07:ALTERNATING CURRENT

356213 Statement A :
In a purely inductive or capacitive circuit, the current is referred to as wattless current.
Statement B :
No power is dissipated in a purely inductive or capacitive circuit even though a current is flowing in the circuit.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
PHXII07:ALTERNATING CURRENT

356215 A coil has an inductance of \(0.7H\) and is joined in series with a resistance of \(220\Omega \). When an alternating emf of \(220V\) at \(50cps\) is applied to it, then the wattless component of the current in the circuit is

1 \(7\,A\)
2 \(0.7\,A\)
3 \(5\,A\)
4 \(0.5\,A\)
PHXII07:ALTERNATING CURRENT

356216 The r.m.s. current in an \(AC\) circuit is 2\(A\). If the wattless current be \(\sqrt 3 A\), what is the power factor?

1 \(\frac{1}{{\sqrt 2 }}\)
2 \(\frac{1}{{\sqrt 3 }}\)
3 \(\frac{1}{3}\)
4 \(\frac{1}{2}\)
PHXII07:ALTERNATING CURRENT

356217 Current in the circuit is wattless, if

1 Resistance in the circuit is zero
2 Inductance in the circuit is zero
3 Resistance and inductance both are zero
4 Current is alternating
PHXII07:ALTERNATING CURRENT

356214 Match the following

Column IColumn II
A. Resistive circuitR. Maximum power dissipation
B. Purely inductive or capacitive circuitQ. Wattless current
C. Power dissipated at resonance in L-C-R circuitP. No dissipation

1 A - Q, B - P, C - R
2 A - R, B - Q,P, C - R
3 A - P, B - Q, C - R
4 A - P, B - R, C - Q
Join With Us for More Updates
PHXII07:ALTERNATING CURRENT

356213 Statement A :
In a purely inductive or capacitive circuit, the current is referred to as wattless current.
Statement B :
No power is dissipated in a purely inductive or capacitive circuit even though a current is flowing in the circuit.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
PHXII07:ALTERNATING CURRENT

356215 A coil has an inductance of \(0.7H\) and is joined in series with a resistance of \(220\Omega \). When an alternating emf of \(220V\) at \(50cps\) is applied to it, then the wattless component of the current in the circuit is

1 \(7\,A\)
2 \(0.7\,A\)
3 \(5\,A\)
4 \(0.5\,A\)
PHXII07:ALTERNATING CURRENT

356216 The r.m.s. current in an \(AC\) circuit is 2\(A\). If the wattless current be \(\sqrt 3 A\), what is the power factor?

1 \(\frac{1}{{\sqrt 2 }}\)
2 \(\frac{1}{{\sqrt 3 }}\)
3 \(\frac{1}{3}\)
4 \(\frac{1}{2}\)
PHXII07:ALTERNATING CURRENT

356217 Current in the circuit is wattless, if

1 Resistance in the circuit is zero
2 Inductance in the circuit is zero
3 Resistance and inductance both are zero
4 Current is alternating
PHXII07:ALTERNATING CURRENT

356214 Match the following

Column IColumn II
A. Resistive circuitR. Maximum power dissipation
B. Purely inductive or capacitive circuitQ. Wattless current
C. Power dissipated at resonance in L-C-R circuitP. No dissipation

1 A - Q, B - P, C - R
2 A - R, B - Q,P, C - R
3 A - P, B - Q, C - R
4 A - P, B - R, C - Q