CIE Physics Paper-1: Specimen Questions 45 - 46 of 109

Question number: 45

MCQ▾

Question

Complete the table below

Table for results of different loads and corresponding lengths carried out from experiment.

Here in above table lists of measured extension in length of rubber band for different load are given.

Load (N)

0

1

2

3

Length (cm)

15.2

16.2

17.3

18.6

Extension (cm)

0

1.0

________

3.4

Find missing figure in the table?

Choices

Choice (4) Response
a.

18.3

b.

2.1

c.

17.3

d.

17.4

Answer

b.

Explanation

Here due to load extension of rubber is taking places.

From first column, when load is zero, extension is zero so original length is 15.2.

Now as load increases, the length of rubber extended. Therefore for load 2 N, the length measured is 17.3 cm.

And original length is 15.2

So missing figure in extension of length is,

Length=Originallength+Extension

17.3=15.2+Extension

Extension=17.315.2=2.1cm

Question number: 46

MCQ▾

Question

Find 2 faulty ammeters, if there are 2 faulty ammeters and 2 perfect ammeters in series.

Circuit diagram of two faulty and two perfect ammeters.

Circuit diagram of two faulty and two perfect ammeters.

In figure two faulty and two perfect ammeters are connected in series with a resistance box and a battery.

The readings on the ammeters are

The readings on the ammeters are

In given table of readings on the ammeters are

A1

2.9A

A2

3.1A

A3

3.1A

A4

3.3A

Choices

Choice (4) Response
a.

A3 and A4

b.

A1 and A4

c.

A2 and A3

d.

A1 and A2

Answer

b.

Explanation

Here in given circuit diagram four ammeters are connected in series. In series same current passes through all elements which are connected in series. Therefore same current passing through all the ammeters, thus same reading should be indicated. But from given data A1 and A4 gave different readings from A2 and A3. So A1 and A4 are the faulty ammeter.

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