Physics Sample Test Paper 1 - AIEEE 2009

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(SOLVED)
Note : All Answers are in red.

1. Two cells of e.m.f. 10 V & 15 V are connected in parallel to each other between points A & B. The cell of e.m.f. 10 V is ideal but the cell of e.m.f. 15 V has internal resistance 1 Ω. The equivalent e.m.f. between A and B is:

V

not defined
15 V
10 V

2. In the figure shown the thermal power generated in ' y ' is maximum when y = 4 Ω. Then X is:

2 Ω
3 Ω
1 Ω
6 Ω

3. A cell of emf E having an internal resistance r is connected to an external resistance R. The potential difference V across the resistance R varies with R as shown in figure by the curve :

A
B
C
D

4. When a galvanometer is shunted with a 4Ω resistance, the deflection is reduced to one - fifth. If the galvanometer is further shunted with a 2Ω wire, determine current in galvanometer now if initially current in galvanometer is I₀.
I₀/13
I₀/5
I₀/8
5I₀/13

5. Select the correct alternative (s): A micrometer has a resistance of 100 Ω and a full scale range of 50 μ A. It can be used as a voltmeter or as a higher range ammeter provided a resistance is added to it. Pick the correct range and resistance combination(s).
50 V range with 10 K Ω resistance in series
10 V range with 100 K Ω resistance in series
5 mA range with 1 Ω resistance in parallel
10 mA range with 1 Ω resistance in parallel.

6. In the figure shown part of circuit :

current will flow from A to B
current may flow from A to B
current will flow from B to A
the direction of current will depend on r.

7. The equivalent resistance between A and B will be (in Ω)

2/7
8
4/3
7/3

8. N cells each of e.m.f. E & identical resistance r are grouped into sets of K cells connected in series. The (N/K) sets are connected in parallel to a load of resistance R, then;
Maximum power is delivered to the load if K =.

Maximum power is delivered to the load if K =
Minimum power delivered to the load is

Maximum power delivered to the load is

9. In the circuit shown the readings of ammeter and voltmeter are 4A and 20V respectively. The meters are non-ideal, then R is


5 Ω
less than 5Ω
greater than 5Ω
between 4Ω and 5Ω.

10. In the fig. the potentiometer wire AB of length L & resistance 9 r is joined to the cell D of e.m.f. ε & internal resistance r. The cell C's e.m.f. is ε/2 and its internal resistance is 2 r. The galvanometer G will show no deflection when the length AJ is:


4L/9
5L/9
7L/18
11L/18