This document consists of 6 printed pages. 19 M Test (Unit 16-20) :................................................................................................................ :........................................................ Code: 5054 Class: CII urn over [T heory Section: T [Total arks] Time Allowed: 35Minutes Maximum Marks: 25 NIQUE SCIENCE ACADEMY U Date Name Paper: Physics 1 [Total 6] Dedicated to My Son Mohammad Irtaza Zain. Code 5054 Fig. 1.1 Fig. 1.1 shows a loudspeaker cone oscillating to produce sound waves. 1 cone oscillates to produce sound waves loudspeaker cone (a) As the sound wave passes a point, it produces regions of higher and lower pressure. State the names of these regions. higher pressure .......................................................... lower pressure .......................................................... [2] (b) Describe how the movement of the loudspeaker cone produces these regions of different pressure. higher pressure ......................................................................................................................... ................................................................................................................................................... lower pressure .......................................................................................................................... .............................................................................................................................................. [2] (c) State the effect on the loudness and pitch of the sound from the loudspeaker when (i) the amplitude increases but the frequency of the sound stays the same, loudness ............................................................................................................................ pitch ................................................................................................................................... (ii) the amplitude stays the same but the frequency increases. loudness ............................................................................................................................ pitch ................................................................................................................................... [2] Irtaza Zain
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This document consists of 6 printed pages.
19 M
Test (Unit 16-20) :................................................................................................................
(c) The student now connects a voltmeter to the circuit, so that readings can be taken to find the resistance of the coil of wire. On your circuit diagram, draw the voltmeter, connected to measure the potential difference across the coil. [1]
[Total 4]
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3
Fig. 3.1
Fig. 3.1 shows a circuit containing a 12 V power supply, some resistors and an ammeter whose 3 resistance is so small that it may be ignored.
6Ω
2Ω 4Ω
12V
A
3Ω
(a) (i) Determine the potential difference across the 2 Ω resistor.