MHT CET 2021 20th September Morning Shift | Alternating Current Question 76 | Physics

An inductor coil wound uniformly has self inductance 'L' and resistance 'R'. The coil is broken into two identical parts. The two parts are then connected in parallel across a battery of 'E' volt of negligible internal resistance. The current through battery at steady state is

$$\mathrm{\frac{2E}{R}}$$

$$\mathrm{\frac{3E}{R}}$$

$$\mathrm{\frac{4E}{R}}$$

$$\mathrm{\frac{E}{R}}$$

MHT CET 2021 20th September Morning Shift

MCQ (Single Correct Answer)

-0

An inductor coil takes current 8A when connected to an 100 V and 50 Hz a.c. source. A pure resistor under the same condition takes current of 10A. If inductor coil and resistor are connected in series to an 100V and 40 Hz a.c. supply, then the current in the series combination of above resistor and inductor is

$$\frac{10}{\sqrt3}$$A

$$\frac{5}{\sqrt2}$$A

10$$\sqrt2$$A

5$$\sqrt2$$A

MHT CET 2020 19th October Evening Shift

MCQ (Single Correct Answer)

-0

An AC circuit contains resistance of $12 \Omega$ and inductive reactance $5 \Omega$. The phase angle between current and potential difference will be

$\sin ^{-1}\left(\frac{12}{13}\right)$

$\cos ^{-1}\left(\frac{5}{12}\right)$

$\sin ^{-1}\left(\frac{5}{12}\right)$

$\cos ^{-1}\left(\frac{12}{13}\right)$

MHT CET 2020 16th October Evening Shift

MCQ (Single Correct Answer)

-0

A step-up transformer has 300 turns of primary winding and 450 turns of secondary winding. A primary is connected to 150 V and the current flowing through it is 9A. The current and voltage in the secondary are

$$13.5 \mathrm{~A}, 100 \mathrm{~V}$$

$$13.5 \mathrm{~A}, 225 \mathrm{~V}$$

$$4.5 \mathrm{~A}, 100 \mathrm{~V}$$

$$6.0 \mathrm{~A}, 225 \mathrm{~V}$$

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