Q.1 |
An excess of dilute sulphuric acid reacts with both aqueous barium hydroxide and aqueous barium chloride respectively. In what way are the two reactions same? |
a) |
A gas is evolved |
b) | An insoluble salt is formed |
c) | Their final pH is 7 |
d) | A base is produced |
Q.2 |
Four resistors of 2 Ω each are joined end to end to form a square ABCD. Calculate the equivalent resistance of the combination between any two adjacent corners. ![]() |
a) |
1.5 Ω |
b) | 3.0 Ω |
c) | 4.5 Ω |
d) | 6.0 Ω |
Q.3 |
The power of a lens is + 2.5 D. What kind of lens is it and what is its focal length? |
a) |
Concave lens, 100 cm |
b) | Concave lens, 40 cm |
c) | Convex lens, 40 cm |
d) | Convex lens, 50 cm |
Q.4 |
Which of the given reactions is an odd one? |
a) |
Carbon + Oxygen → Carbon dioxide |
b) | Hydrogen + Chlorine → Hydrogen chloride |
c) | Glucose → Carbon dioxide + Water |
d) | Sulphur + Oxygen → Sulphur dioxide |
Q.5 |
What is the charge flowing through a resistor R in 4 s? ![]() |
a) |
3 C |
b) | 6 C |
c) | 12 C |
d) | 18 C |
Q.6 |
Observe the given circuit. Find the current passing through 6 Ω resistor. ![]() |
a) |
0.72 A |
b) | 0.80 A |
c) | 0.48 A |
d) | 0.62 A |
Q.7 |
Which of the following increases the turning speed of a simple DC motor? (i) An increase in the number of turns of the coil. (ii) An increase in the input of the DC voltage. (iii) The inserting of a copper core in the coil. |
a) |
Only (i) and (ii) |
b) | Only (i) and (iii) |
c) | Only (ii) and (iii) |
d) | (i), (ii) and (iii) |
Q.8 |
Which of the field patterns given below is valid for both electric and magnetic fields? |
a) |
![]() |
b) | ![]() |
c) | ![]() |
d) | ![]() |
Q.9 |
In an experiment, four resistance wires made from the same material are connected in between the terminals P and Q in the circuit as shown below. The length and diameter of the wires are different. Which wire will give the smallest reading on the ammetre? ![]() |
a) |
Length - 0.5 m, Diameter -0.5 mm |
b) | Length - 0.5 m, Diameter - 0.05 mm |
c) | Length - 5 m, Diameter - 0.5 mm |
d) | Length - 5 m, Diameter - 0.05 mm |
Q.10 |
A current carrying wire in a magnetic field results in ________.
|
a) |
Only (i) |
b) | Only (ii) |
c) | Only (iii) |
d) | None of the above |
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Answers to Sample Questions from Olympiad Success:
Q.1 : b | Q.2 : a | Q.3 : c | Q.4 : c | Q.5 : c | Q.6 : c | Q.7 : a | Q.8 : c | Q.9 : d | Q.10 : c