A bulb rated 60W at 220V is connected across a household supply of alternating voltage of 220V. Calculate the maximum instantaneous current through the filament.
Download our app for free and get started
$\text{P}=60\text{W},\text{V}=220\text{V}=\text{E}$
$\text{R}=\frac{\text{V}^2}{\text{P}}=\frac{220\times220}{60}$
$=806.67$
$\in_0=\sqrt{2}\text{E}=1.414\times220$
$=311.08$
$\text{I}_0=\frac{\in_0}{\text{R}}=\frac{806.67}{311.08}$
$=0.385\approx0.39\text{A}$
$\text{R}=\frac{\text{V}^2}{\text{P}}=\frac{220\times220}{60}$
$=806.67$
$\in_0=\sqrt{2}\text{E}=1.414\times220$
$=311.08$
$\text{I}_0=\frac{\in_0}{\text{R}}=\frac{806.67}{311.08}$
$=0.385\approx0.39\text{A}$
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1An inductor-coil, a capacitor and an AC source of rms voltage 24V are connected in series. When the frequency of the source is varied, a maximum rms current of 6.0A is observed. If this inductor coil is connected to a battery of emf 12V and internal resistance $4.0\Omega,$ what will be the current?View Solution
- 2The instantaneous current in an ac circuit is $\text{i}=0.5\sin314\text{t},$ what is (i) rms value and (ii) frequency of the current.View Solution
- 3View SolutionCalculate the equivalent capacitance between points A and B in the circuit below. If a battery of 10 V is connected across A and B, calculate the charge drawn from the battery by the circuit.
- 4View SolutionIn what way is Gauss’s law in magnetism different from that used in electrostatics? Explain briefly. The Earth’s magnetic field at the Equator is approximately 0.4 G. Estimate the Earth’s magnetic dipole moment. Given: Radius of the Earth = 6400 km.
- 5A sinusoidal voltage of peak value $283 V$ and frequency $50 Hz$ is applied to a series $L C R$ circuit in which $R =3 \Omega, L=25.48 mH$, and $C =796 \mu F$. Find (a) the impedance of the circuit; (b) the phase difference between the voltage across the source and the current; (c) the power dissipated in the circuit; and (d) the power factor.View Solution
- 6View Solution
- Draw a schematic ray diagram of a compound microscope when image is formed at distance of distinct vision.
- Write the expression for resolving power of a compound microscope. How can the resolving power of a microscope be increased?
- 7View SolutionA series LCR circuit with R = 20Ω, L = 1.5H and C = 35μF is connected to a variable-frequency 200V ac supply. When the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle?
- 8View SolutionUsing truth tables of AND gate and NOT gate show that NAND gate is an AND gate followed by a NOT gate. Hence write the truth table of NAND gate.
Why are NAND gates called ‘Universal Gates’? - 9View Solution
- Define the term ‘intensity of radiation’ in terms of photon picture of light.
- Two monochromatic beams, one red and the other blue, have the same intensity. In which case (i) The number of photons per unit area per second is larger, (ii) The maximum kinetic energy of the photoelectrons is more? Justify your answer.
- 10View SolutionAn object is placed 15 cm in front of a convex lens of focal length 10 cm. Find the nature and position of the image formed. Where should a concave mirror of radius of curvature 20 cm be placed so that the final image is formed at the position of the object itself?