मैट्रिक स्पेशल | 60 मिनट 60 प्रश्न | V.V.I OBJECTIVE QUESTIONS | अब 90% कंफर्म✅Bihar Board

Two bulbs are rated 30 W - 200 V and 60 W - 200 V . They are connected with a 400 V power supply. Find which bulb will get fused if they are connected in (i) series and (ii) parallel.

There are two electric bulb : (i) marked 60 W, 220 V and (ii) marked 100W, 220 V Which one of them has higher resistance ?

Each of these questions consists of a question followed by information in two statements I and II. You have to study the question and the statements and decide that the information in which of the statement/s is/are required to answer the question. In the following question, the symbols *, %, #, @, &, $ , and © are used with the following meanings as illustrated below. A * B = A is the father of B A % B = A is the sister of B A @ B = A is the mother of B A # B = A is the brother of B A & B = A is the husband of B A $ B = A is the son of B A © B = A is the daughter of B There are three married couples and S is not married to K and V is unmarried, then who is the uncle of K? I. P * R, T @ S, R & U, Q * K, V © R, P & T. II. P @ U, Q * S, T % K, R * V, S & T, V & P.

A speaks truth n 60% of the cases and B in 90% of the cases. In what percentage of cases are they likely to i. contradict each other in stating the same fact? ii. agree in stating the same fact?

A step down transformer converts transmission line voltage from 11000 V to 220 V. The primary of the transformer has 6000 turns and efficiency of the transformer is 60%. If the output power is 9 kW, then the input power will be

A 100 mu F capacitor in series with a 40 Omega resistance is connected to a 100 V_(1) 60 Hz supply. Calculate (i) the reactance (ii) the impedance and (iii) maximum current in the circuit.

A three - way light bulb has three brightness settings ( low , medium , and high) but only two filaments . The two filaments are arranged in three settings, when connected across a 120 V line and can dissipate 60 , 120 and 180 W . Answer the following questions: (i) Higher resistance filament only works for 60 W ii. Low resistance filament works for 120 W iii.Low resistance filament works for 60 W iv. High resistance filament works for 120 W v. Low and high resistance filaments in parallel for 180 W vi. Low and high resistance filament in series for 180 W