At resonance the value of the power factor in an L-C-R series circuit is_______________?
A choke is used as a resistance in_________________?
A 10Ω electric heater is connected to a 220V 50Hz mains supply. What is the peak value of the potential difference across the heater element ?
The frequency of a circuit consisting of a capacitance C and a resistor R is________________?
What is the self-inductance of a coil in which an induced emf of 2V is set up when the current changes at the rate of 4 As-1 ?
When a pure inductor of inductance L and a pure capacitor of capacitance C are connected in parallel to a sinusoidal potential difference V the potential difference across both L & C will be_______________?
Ammeter connected in an AC circuit measures______________?
A wire of resistance R is coiled inductively so that its inductance is L. The impedance of the coil at a frequency of f is_______________?
Unit vector n^ is along______________?
A vector can be multiplied by a number. The number may be_______________?
