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(MCQ) General Science: Gist of Physics from NCERT Books

1. Consider the following statements:

1. Isobars are atoms of the same element which have different mass numbers.
2. Isotopes are atoms having the same mass number but different atomic numbers.

Which of the above statements is/are correct?

1. Only 1
2. Only 2
3. Both 1 & 2
4. Neither 1 nor 2

2. Consider the following statements:

1. The transfer of heat by radiation does not require any medium.
2. In Solids, generally the heat is transferred by the process of conduction.

Which of the above statements is/are correct?

1. Only 1
2. Only 2
3. Both 1 & 2
4. Neither 1 nor 2

3. Consider the following statements:

1. A concave lens always forms erect, virtual and smaller image than the object.
2. A convex lens can forms real and inverted image.
3. Concave mirrors are commonly used in search-lights and vehicles headlights.

Which of the above statements is/are correct ?

1. Only 1 and 2
2. Only 1 and 3
3. Only 2 and 3
4. All of the above

4. Consider the following statements:

1. Conductors are materials which electrical charges and heat energy can be transmitted very easily.
2. Semi conductors are materials which allow the electrical charges to flow better than insulators but less than conductors.

Which of the above statements is/are correct ?

1. Only 1
2. Only 2
3. Both 1 & 2
4. Neither 1 nor 2

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