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Expert Mdcat: Expert Emergency Series 2020 F.Sc. (Part-II)

This document provides a practice test for the MDCAT exam covering alternating current concepts in physics. It contains 10 short answer questions worth 2 marks each (20 marks total) and 2 long answer questions worth 5 marks each (10 marks total), for a total of 30 marks. The questions cover topics like AM and FM radio, selecting radio stations, conditions for electromagnetic wave production, R-L circuits, peak and RMS current and voltage values, impedance, advantages of AC, and effects of frequency on inductor and capacitor reactance.

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58 views1 page

Expert Mdcat: Expert Emergency Series 2020 F.Sc. (Part-II)

This document provides a practice test for the MDCAT exam covering alternating current concepts in physics. It contains 10 short answer questions worth 2 marks each (20 marks total) and 2 long answer questions worth 5 marks each (10 marks total), for a total of 30 marks. The questions cover topics like AM and FM radio, selecting radio stations, conditions for electromagnetic wave production, R-L circuits, peak and RMS current and voltage values, impedance, advantages of AC, and effects of frequency on inductor and capacitor reactance.

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Copyright
© © All Rights Reserved
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EXPERT MDCAT
Expert Emergency Series 2020
F.Sc. (Part-II)
Test: Alternating Current Time Allowed: 40 Mins
Total Marks: 30 Marks
PHYSICS
SECTION-I
Short Questions
Note: Attempt all questions. All questions carry equal marks. 02x10 = 20 marks

Q.No.1: What Is meant by AM and FM?

Q.No.2: How the reception of a particular radio station is selected on your radio station?

Q.No.3: State the conditions under which the electromagnetic waves are produced from a
source.

Q.No.4: in a R-L circuit, will the current lag or lead the voltage? Illustrate by vector diagram.

Q.No.5: A sinusoidal current has rms value of 10 A. What is the maximum or peak value?

Q.No.6: What is choke? Why is it used?

Q.No.7: When 10 V are applied to a circuit, the current flowing in it is 100 mA. Find its
impedence.

Q.No.8: What is peak to peak value and root mean square value?

Q.No.9: What are the advantages of AC?

Q.No.10: How does doubling the frequency affect the reactance of:
(a) an inductor (b) a capacitor

SECTION-II
Long Questions
Note: Attempt all questions. All questions carry equal marks. 02x05 = 10 marks

Q.No.1: Write a note on AC through and inductor.

Q.No.2: A circuit has an inductance of 1/π H and resistance of 2000 Ω. A 50 Hz AC is


supplied to it. Calculate the reactance and impedance offered by the circuit.

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