INSIGHT UPSC QUIZ

With reference to the uses of ‘concave mirrors’, read the following statements carefully:

1. They are commonly used in vehicles headlights to get powerful parallel beams of light. 

2. They are often used as shaving mirrors to see a larger image of the face. 

3. They are fitted on the sides of the vehicle to have a wider field of view.

4. Large concave mirrors are used to concentrate sunlight to produce heat in solar furnaces.

Which of the statements given above is/are correct?

Consider the following statements: 

1. The aperture of the pupil of a human eye can be changed with the help of the ciliary muscles. 

2. The curvature of human eye cannot be changed, because the lens of a human eye is fixed. 

Which of the statements given above is/are correct?

If we study a cell under a microscope, we will come across which among the following bodies inside it?

Consider the following statements:

1. The direction of current is taken opposite to the direction of flow of electrons.

2. Resistance is a property of a conductor that generates heat in the electrical circuit.

3. The SI unit of electric current is Amperes. 

Select the correct answer using the code given below:

When light enter the human eye, it passes through the different parts of the eye. In this context arrange the following in the correct sequence:

 Consider the following statements with reference to the ‘magnetic field’ of a bar magnet:

1. Magnetic field is a quantity that has both direction and magnitude. 

2. Inside the magnet, the direction of field lines is from its south pole to north pole.

3. Magnetic field-lines of two different magnets can intersect each other.

Which of the statement(s) given above is/are correct?

Unicellular organism are unique because they are made up of a single cell only. Which of the following is/are examples of unicellular organisms?

1. Amoeba

2. Yeast

3. Bacteria

Select the correct answer using the code given below:

If an opaque object on the path of light becomes very small, light has a tendency to bend around it and not walk in a straight line. This effect is known as:

According to Archimedes’ principle - When a body is immersed fully or partially in a fluid, it experiences an upward force that is equal to the weight of the fluid displaced by it. Which among the following are based on the application of this principle?

1. Ships

2. Lactometer

3. Thermometer

Select the correct answer using the code given below:

Read the following statements carefully:

1. Vector-borne diseases are caused by parasites, viruses and bacteria. 

2. Skin infections are generally caused by different kinds of fungi.

3. Elephantiasis is a disease caused by different species of worms.

Which of the statement(s) given above is/are correct?