Which of the following statements is NOT true of \(\gamma\)-rays?
A.
\(\gamma\)-rays belong to the electromagnetic spectrum
B.
\(\gamma\)-rays do not carry an electron charge
C.
\(\gamma\)-rays obey the inverse cube law in air
D.
the thickness of aluminium which stops b-particule has a negligible effect on \(\gamma\)-radiation
E.
the difference between \(\gamma\)-rays and X-rays is that \(\gamma\)-rays originate from energy charges in the nuclei of atoms, while X-rays comes from energy charges associated with the electron structure of atoms
A high-resistance voltmeter reads 3.0V when connected across the terminals of a battery on open circuit and 2.6V when the battery supplies a current of 0.2A through a lamp. The resistance of lamp is
