Q. 4 A4.0( 29 Votes )
Three resistors 2 W, 4 W and 5 W are combined in parallel. What is the total resistance of the combination?
Since three resistors are connected in parallel, hence total resistance(R) of the combination is given by
Hence, Total Resistance is 1.05 Ω
Rate this question :
An inductor-coil, a capacitor and an AC source of rms voltage 24 V are connected in series. When the frequency of the source is varied, a maximum rms current of 6.0 A is observed. If this inductor coil is connected to a battery of emf 12 V and internal resistance 4.0Ω, what will be the current?HC Verma - Concepts of Physics Part 2
An inductance of 2.0 H, a capacitance of 18 μF and a resistance of 10 kΩ are connected to an AC source of 20 V with adjustable frequency.
(a) What frequency should be chosen to maximize the current in the circuit?
(b) What is the value of this maximum current?
HC Verma - Concepts of Physics Part 2
The current in a discharging LR circuit is given by i = i0e–t/τ where τ is the time constant of the circuit. Calculate the rms current for the period t = 0 to t = τ.HC Verma - Concepts of Physics Part 2
The household supply of electricity is at 220 V (rms value) and 50 Hz. Find the peak voltage and the least possible time in which the voltage can change from the rms value to zero.HC Verma - Concepts of Physics Part 2
Find the time required for a 50 Hz alternating current to change its value from zero to the rms value.HC Verma - Concepts of Physics Part 2
For wiring in the home, one uses Cu wires or Al wires. What considerations are involved in this?Physics - Exemplar