Which of the following units is equivalent to the unit of electric current?
C s\({-1}\)
W
J s\({-1}\)
C
Correct answer is A
Q = It
I = Q/t
I = C / s
= Cs\(^{-1}\)
An atom that emits an a-particle?
may become a different element.
becomes a different isotope of the element
daughter with increased mass
becomes a daughter of a different element always
Correct answer is A
Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and
thereby transforms or 'decays' into a different atomic nucleus, with a mass number that is reduced by four and an atomic number that is reduced by two.
15m
84m
72m
48m
Correct answer is C
Distance covered = Area under the graph
D = area of square + area of trapezium
D = L x L + 1/2(a+b)h
D = 4 x 4 + 1/2( 4+ 10)8
D = 16 + 1/2 x 14 x 8
D = 16 + 56
D = 72m.
2.00 x 10\(_{-3}\)H
1.59 x 10\(_{-3}\)H
1.09 x 10\(_{-3}\)H
6.28x 10\(_{-3}\)H
Correct answer is B
No explanation has been provided for this answer.
152.0N
132.0N
15.2N
440.0N
Correct answer is C
No explanation has been provided for this answer.
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