Question
Calculate the current drawn from the battery in the given network.
✓
Answer
$\text{R}_{\text{equivalent}} = 2\Omega$
$\text{I} = \frac{\text{V}}{\text{R}} = 2\it\text{A}.$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Define the SI unit of the magnetic field.
The current in a discharging LR circuit is given by $\text{i}=\text{i}_0\text{e}^{\frac{-\text{t}}{\tau}}$ where $\tau$ is the time constant of the circuit. Calculate the rms current for the period $\text{t}=0$ to $\text{t}=\tau.$
→Electrons are emitted from a photosensitive surface when it is illuminated by green light but electron emission does not take place by yellow light. Will the electrons be emitted when the surface is illuminated by (i) red light, and (ii) blue light?
Calculate the bulk modulus of air from the following data about a sound wave of wavelength 35cm travelling in air. The pressure at a point varies between $(1.0\times10^5\pm14)$ Pa and the particles of the air vibrate in simple harmonic motion of amplitude 5.5 × 10-6m.
→Unpolarised light is passed through a polaroid P1. When this polarised beam passes through another polaroid P2 and if the pass axis of P2 makes angle $\theta$ with the pass axis of P1, then write the expression for the polarised beam passing through P2. Draw a plot showing the variation of intensity when $\theta$ varies from 0 to $2\pi$.
→An inductor is connected to a battery through a switch. Explain why the emf induced in the inductor is much larger when the switch is opened as compared to the emf induced when the switch is closed.
In the decay 64Cu → 64Ni + e+ + v, the maximum kinetic energy carried by the positron is found to be 0.650MeV.
- What is the energy of the neutrino which was emitted together with a positron of kinetic energy 0.150MeV?
- What is the momentum of this neutrino in kg-m/s?
A railroad car of mass M is at rest on frictionless rails when a man of mass m starts moving on the car towards the engine. If the car recoils with a speed v backward on the rails, with what velocity is the man approaching the engine?
Distinguish between polarised and unpolarized light. Does the intensity of polarised light emitted by a Polaroid depend on its orientation? Explain briefly.
The vibrations in a beam of polarised light make an angle of 60° with the axis of the polaroid sheet. What percentage of light is transmitted through the sheet?
The vibrations in a beam of polarised light make an angle of 60° with the axis of the polaroid sheet. What percentage of light is transmitted through the sheet?
What is lens? State their types and draw their diagram.