Question
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.
✓
Answer
Due to self inductance the emf produced when circuit is open the growth of current in inductor is small but when switch is closed the decay in current is faster thus emf induced is more.
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
A boy puts a heavy box of mass M on his head and jumps down from the top of a multistoried building to the ground. How much is the force exerted by the box on his head during his free fall? Does the force greatly increase during the period he balances himself after striking the ground?
How much weight will be required to lift a stone weighting 800 kg in a hydraulic lift. Given that the ratio of the cross-sectional areas of the two piston is 4 then is the work done by the machine more than the work done on the machine? Explain.
A manometer reads the pressure of a gas in an enclosure as shown in Fig.$(a)$ When a pump removes some of the gas, the manometer reads as in Fig. $(b)$ The liquid used in the manometers is mercury and the atmospheric pressure is $76\ cm$ of mercury. Give the absolute and gauge pressure of the gas in the enclosure for cases $(i)$ and $(ii)$ in units of cm of mercury. How would the levels change in case $(i)$ if $13.6\ cm$ of water $($immiscible with mercury$)$ are poured into the right limb of the manometer? $($Ignore the small change in volume of the gas.$)$
→What is convection current? How does it form land and sea breeze?
A person driving a car suddenly applies the brakes on seeing a child on the road ahead. If he is not wearing seat belt, he falls forward and hits his head against the steering wheel. Why?
These days people use steel utensils with copper bottom. This is supposed to be good for uniform heating of food. Explain this effect using the fact that copper is the better conductor.
If the length and time period of an oscillating pendulum have errors of 1% and 2% respectively, what is the error in the estimate of g?
Find the binding energy of a hydrogen atom in the state n = 2.
Give any five discoveries which has effected the society more.
Find the temperature at which root mean square velocity of a gas is half of its value at 0°C, while pressure remaining constant.