Question
State two factors on which the position of Center of Gravity of a body depends
State two factors on which the position of Center of Gravity of a body depends.
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Complete the following by choosing the correct answers from the bracket
Complete the following by choosing the correct answers from the bracket: (a) A car is moving in uniform circular motion. The direction…
Question
A lithium atom has 3 electrons, 3 protons and 4 neutrons. Its mass number is:
A lithium atom has 3 electrons, 3 protons and 4 neutrons. Its mass number is: (a) 3 (b) 4 (c) 7 (d)…
Question
Equal masses of substances A, B and C take 5, 7 and 3 minutes to melt. Which has the highest latent heat?
Equal masses of substances A, B and C, each at its melting point, take 5 minutes, 7 minutes and 3 minutes respectively…
Question
Which compass is correctly aligned near a wire carrying current into the plane of the paper?
The diagram shows two compasses near a straight wire carrying current into the plane of the paper. Which compass is correctly aligned?…
Question
The equivalent resistance of two resistors connected in parallel is:
The equivalent resistance of two resistors R1 and R2 connected in parallel is: (a) (b) (c) (d)
Question
When the length of a stretched metallic wire is doubled, its specific heat:
When the length of a stretched metallic wire is doubled, its specific heat: (a) becomes double (b) becomes four times (c) becomes…
Question
Three jars contain equal volumes of water. Which produces the shrillest sound when blown?
Three cylindrical jars A, B and C contain equal volumes of water up to different heights. Their radii satisfy rB < rA…
Question
Which lamp can fail without interrupting the glow of the other lamps?
Study the circuit diagram containing lamps L1, L2, L3 and L4. Which lamp can fail without interrupting the glow of the other…
Question
Assertion and Reason on scattering of blue light by air molecules
Assertion: Tiny air molecules scatter blue light more than red light. Reason: The refractive index of air is greater for blue light…