The half-life of a radioactive substance is 2 seconds. Calculate the decay constant
0.035s-1
0.151s-1
0.347s-1
0.576s-1
1.386s-1
Correct answer is C
\(\lambda = \frac{0.693}{T_{\frac{1}{2}}} = \frac{0.693}{2}\)
= 0.347s-1
4.0 x 10-26J
4.0 x 10-21J
6.4 x 10-20J
3.2 x 10-15J
2.5 x 10-20J
Correct answer is D
E = \(\frac{1}{2}QV = \frac{1}{2} \times 1.6 \times 10^{-19} \times 40000\)
= 3.2 x 10-15J
i and iii only
i and ii only
ii and iv only
iii and iv only
i, ii and iv only
Correct answer is A
No explanation has been provided for this answer.
Nm
N
Nm-2
Nm2
Nm1
Correct answer is C
No explanation has been provided for this answer.
An induction coil is generally used to?
rectify an alternating current
produce a large input voltage
smoothen a pulsating direct current
modulate an incoming signal
produce a large output voltage
Correct answer is E
An induction coil is a device used to produce high emf from a low-voltage direct current (DC) supply.