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In a dry cell (battery), which of the following are used as electrolytes ?
(a)
Ammonium chloride and Zinc chloride
(b)
Sodium chloride and Calcium chloride
(c)
Magnesium chloride and Zinc chloride
(d)
Ammonium chloride and Calcium chloride
(A)
Consider the following statements: 1. A widely used musical scale called diatonic scale has seven frequencies. 2. The frequency of the note Sā is 256 Hz and that of Nī is 512 Hz.
1 only
2 only
Both 1 and 2
Neither 1 nor 2
Which one of the following laser types is used in a laser printer?
Dye laser
Gas laser
Semiconductor laser
Excimer laser
(C)
Assertion (A): Radio waves bend in a magnetic field. Reason (R): Radio waves are electromagnetic in nature.
Both A and R are individually true and R is the correct explanation of A
Both A and R are individually true and R is not the correct explanation of A
A is true but R is false
A is false but R is true
An oil tanker is partially filled with oil and moves forward on a level road with uniform acceleration. The free surface of oil then:
Remains horizontal
Inclined to the horizontal with smaller depth at the rear end
Inclined to the horizontal with larger depth at the rear end
Assumes parabolic curve