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1.
The time taken by AC of 50 Hz in reaching from zero to the maximum value is
2.
A 100 V, AC source of frequency 500 Hz is connected to an L-C-R circuit with L=8.1 mH, 
, 
all connected in series as shown in figure. What is the qualityfactor of circuit?
, all connected in series as shown in figure. What is the qualityfactor of circuit?
3.
An AC voltage source has an output of 
This source is connected to a 
resistor. RMS current in the resistance is
This source is connected to a resistor. RMS current in the resistance is
4.
The average power dissipated in a pure inductor of inductance 
when an ac current is passing through it, is
(Inductance of the coil L and current I)
when an ac current is passing through it, is(Inductance of the coil L and current I)
5.
A rectangular loop with a sliding connector of length 
m is situated in a uniform magnetic field B = 2T. Perpendicular to the plane of loop. Resistance of connector is 
. Two resistance of 6
and 3 are connected as shown in figure. The external force required to keep the connector moving with a constant velocity 
is
m is situated in a uniform magnetic field B = 2T. Perpendicular to the plane of loop. Resistance of connector is . Two resistance of 6 and 3 are connected as shown in figure. The external force required to keep the connector moving with a constant velocity is
6.
In a region of uniform magnetic induction 
, a circular coil of radius 
and resistance 
is rotated about an axis which is perpendicular to the direction of 
and which forms a diameter of the coil. If the rotates at 
the amplitude of the alternating current induced in the coil is
, a circular coil of radius and resistance is rotated about an axis which is perpendicular to the direction of and which forms a diameter of the coil. If the rotates at the amplitude of the alternating current induced in the coil is
7.
In an ac circuit with voltage 
and current 
, the power dissipated is
and current , the power dissipated is
8.
In an AC circuit, the instantaneous values of emf and current are 
volt and 
amp
The average power consumed in watt is
volt and amp The average power consumed in watt is
9.
If an 
resistance and 
reactance are present in an ac series circuit then the impedance of the circuit will be
resistance and reactance are present in an ac series circuit then the impedance of the circuit will be
10.
Alternating current cannot be measured by DC ammeter because