Physics - Online Test

Q1. Two cells of 1.25 V and 0.75 V are connected in series with anode of one connected to cathode of the other . The effective voltage will be
Answer : Option B
Explaination / Solution:

The cells support each other.
Q2. The pendulum of a wall clock executes
Answer : Option A
Explaination / Solution:

It executes simple harmonic motion because in this motion restoring force is directly proportional to the displacement towards the mean position at any time.

Q3. Biogenetic law states that ______________
Answer : Option B
Explaination / Solution:
No Explaination.


Q4. Is light a particle or a wave?
Answer : Option A
Explaination / Solution:

Light is an electro magnetic wave, it has dual nature and behave as both particle and wave

Q5. Which method of crop improvement can be practised by a farmer if he is inexperienced?
Answer : Option B
Explaination / Solution:
No Explaination.


Q6. which of the following statements about earth's magnetism is correct
Answer : Option A
Explaination / Solution:
No Explaination.


Q7. Consider two wires X and Y. The radius of wire X is 3 times the radius of Y. If they are stretched by the same load then the stress on Y is
Answer : Option C
Explaination / Solution:
No Explaination.


Q8. Tobacco consumption is known to stimulate secretion of adrenaline. The component causing this could be
Answer : Option A
Explaination / Solution:
No Explaination.


Q9. Basic materials used in the present solid state electronic devices like diode, transistor, ICs, etc are
Answer : Option A
Explaination / Solution:

Semiconductors are materials that have electrical conductivity between conductors such as most metals and nonconductors or insulators like ceramics. Semiconductor material is used in the manufacturing of electrical components and used in electronic devices such as transistors and diodes. Semiconductors are the basic materials used in the present solid state electronic devices like diode, transistor, ICs etc

Q10. According to Kepler’s Law of orbits:
Answer : Option A
Explaination / Solution:

The orbit of a planet around the Sun (or of a satellite around a planet) is not a perfect circle. It is an ellipse—a “flattened” circle. The Sun (or the centre of the planet) occupies one focus of the ellipse. A focus is one of the two internal points that help determine the shape of an ellipse. The distance from one focus to any point on the ellipse and then back to the second focus is always the same.