Physics
Assertion (A) : As the level of water in a tall measuring cylinder kept under running tap rises, the pitch of sound gradually increases.
Reason (R) : Frequency of sound is inversely proportional to the length of the water column.
- Both (A) and (R) are true and (R) is correct explanation of (A).
- Both (A) and (R) are true and (R) is not the correct explanation of (A).
- (A) is true but (R) is false.
- (A) is false but (R) is true.
Related Questions
In a closed circuit containing a bulb and a cell, the electromotive force (ε) and the terminal voltage (V) is related as.
(Given I is current and r is internal resistance.)
- V = ε + Ir
- V = ε – Ir
- V = ε ÷ Ir
- V = ε × Ir
A metal piece of mass 5 g has thermal capacity 2.5 J K⁻¹. If the mass of the metal is tripled, then its specific heat capacity will be :
- 7.5 J K⁻¹
- 2.5 J K⁻¹
- 1.5 J g⁻¹ K⁻¹
- 0.5 J g⁻¹ K⁻¹
In the given circuits Y and Z, the resistors, R1 and R2, are connected in :
- series in both the circuits
- parallel in both the circuits
- parallel in Y and series in Z
- series in Y and parallel in Z
A radioactive element P emits one α-particle and transforms to a new element Q. What will be the position of the element Q in the periodic table?
- One group to the left of P
- One group to the right of P
- Two groups to the right of P
- Two groups to the left of P