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If the first two statements are true, the third statement is :
I. Battery X lasts longer than Battery Y.
II. Battery Y doesn't last as long as Battery Z.
III. Battery Z lasts longer than Battery X.
A three-phase full converter charges a battery from a three-phase supply of 230 V. The battery emf is 200 V and the internal resistance of the battery is 0.5 Ω. Find the value of the continuous current which is flowing through the battery if its terminal voltage is 210 V
Consider the relational schema given below, where eId of the relation dependent is a foreign key referring to empId of the relation employee. Assume that every employee has at least one associated dependent in the dependent relation. Employee (empId, empName, empAge) Dependent(depId, eId, depName, depAge) Consider the following relational algebra query: ΠempId(employee)-ΠempId (employee⋈(empId = eID)∧(empAge ≤ depAge)dependent) The above query evaluates to the set of empIds of employees whose age is greater than that of
Given below are four jumbled sentences. Out of the given options pick the one that gives their correct order. A. You’ve probably noticed, with great disappointment, that the battery doesn’t seem to last as long as it did when it was brand new. B. Partial charging is just fine for lithium-ion batteries and can actually have some positive benefits for cell longevity. C. Smartphone users are forever in search of longer battery life, but unfortunately, battery capacity inevitably declines with age. D. However, one thing you can do to prolong the life of your battery and handset is partial charging.
Consider the following statements: 1. A solid-state battery has a higher energy density than a Lithium-ion battery that uses liquid electrolyte solution. 2. A solid-state battery is cost-effective as compared to a Lithium-ion battery. Which of the statements given above is/are correct?
The Taxi charges in a city consist of a fixed charge together with the charge for the distance covered. For a distance of 7 km, the charge is Rs. 27 and for a distance of 5 km, the charge is Rs. 21. What is the charge per km?
A three-phase full converter charges a battery from a three-phase supply of 230 V. The battery emf is 200 V. Find the value of the firing angle if the battery terminal voltage is 210 V.
Consider the following statements: 1. The voltage developed across the OFF switches of the half-bridge converter is the maximum dc-link voltage. 2. In the full-bridge converter, the voltage across the primary of the transformer is the dc link voltage. 3. The voltage developed across the OFF switches of the full-bridge converter is half the maximum dc-link voltage. Which of the above statements are correct?
A voltage commutated chopper feeds power to an electric car (battery-powered). The battery voltage is 60 V. The SCR turn-off time is 20 μs. Calculate the value of capacitor (C) required for the commutating circuit.
A voltage commutated chopper feeds power to an electric car (battery-powered). The battery voltage is 60 V. Starting current is 60 A and the SCR turn-off time is 20 μs. Calculate the value of inductance (L) required for the commutating circuit.