Radioactivity
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NEET DIGITAL LIBRARY
NUCLEAR PHYSICS

147633 The activity of a radioactive sample is measured as $N_{0}$ counts per minute at $t=0$ and $\mathrm{N}_{0} / \mathrm{e}$ counts per minute at $\mathrm{t}=5$ minutes. The time (in minutes) at which the activity reduces to half its value is

1 $\log _{e} 2 / 5$
2 $\frac{5}{\log _{\mathrm{e}} 2}$
3 $5 \log _{10} 2$
4 $5 \log _{\mathrm{e}} 2$
BITSAT-2017
NUCLEAR PHYSICS

147634 After two hours, one-sixteenth of the starting amount of a certain radioactive isotope remained undecayed. The half life of the isotope is

1 15 minutes
2 30 minutes
3 45 minutes
4 4 hours
BITSAT-2017
NUCLEAR PHYSICS

147636 The ratio of amounts of radioactive substances $X$ and $Y$ at any instant is 1:4. The half- life of substance $X$ is 18 hours and of $Y$ is 12 hours. After three days, the ratio of the amounts of the two substance will be

1 2:1
2 $1: 2$
3 $1: 1$
4 $4: 1$
CG PET- 2017
NUCLEAR PHYSICS

147638 Given a sample of radium-226 having half-life of 4 days. Find, the probability, a nucleus disintegrates after 2 half lives.

1 1
2 $1 / 2$
3 1.5
4 $3 / 4$
Manipal UGET-2014
Join With Us for More Updates
NUCLEAR PHYSICS

147633 The activity of a radioactive sample is measured as $N_{0}$ counts per minute at $t=0$ and $\mathrm{N}_{0} / \mathrm{e}$ counts per minute at $\mathrm{t}=5$ minutes. The time (in minutes) at which the activity reduces to half its value is

1 $\log _{e} 2 / 5$
2 $\frac{5}{\log _{\mathrm{e}} 2}$
3 $5 \log _{10} 2$
4 $5 \log _{\mathrm{e}} 2$
BITSAT-2017
NUCLEAR PHYSICS

147634 After two hours, one-sixteenth of the starting amount of a certain radioactive isotope remained undecayed. The half life of the isotope is

1 15 minutes
2 30 minutes
3 45 minutes
4 4 hours
BITSAT-2017
NUCLEAR PHYSICS

147636 The ratio of amounts of radioactive substances $X$ and $Y$ at any instant is 1:4. The half- life of substance $X$ is 18 hours and of $Y$ is 12 hours. After three days, the ratio of the amounts of the two substance will be

1 2:1
2 $1: 2$
3 $1: 1$
4 $4: 1$
CG PET- 2017
NUCLEAR PHYSICS

147638 Given a sample of radium-226 having half-life of 4 days. Find, the probability, a nucleus disintegrates after 2 half lives.

1 1
2 $1 / 2$
3 1.5
4 $3 / 4$
Manipal UGET-2014
For More Updates join with Us
NUCLEAR PHYSICS

147633 The activity of a radioactive sample is measured as $N_{0}$ counts per minute at $t=0$ and $\mathrm{N}_{0} / \mathrm{e}$ counts per minute at $\mathrm{t}=5$ minutes. The time (in minutes) at which the activity reduces to half its value is

1 $\log _{e} 2 / 5$
2 $\frac{5}{\log _{\mathrm{e}} 2}$
3 $5 \log _{10} 2$
4 $5 \log _{\mathrm{e}} 2$
BITSAT-2017
NUCLEAR PHYSICS

147634 After two hours, one-sixteenth of the starting amount of a certain radioactive isotope remained undecayed. The half life of the isotope is

1 15 minutes
2 30 minutes
3 45 minutes
4 4 hours
BITSAT-2017
NUCLEAR PHYSICS

147636 The ratio of amounts of radioactive substances $X$ and $Y$ at any instant is 1:4. The half- life of substance $X$ is 18 hours and of $Y$ is 12 hours. After three days, the ratio of the amounts of the two substance will be

1 2:1
2 $1: 2$
3 $1: 1$
4 $4: 1$
CG PET- 2017
NUCLEAR PHYSICS

147638 Given a sample of radium-226 having half-life of 4 days. Find, the probability, a nucleus disintegrates after 2 half lives.

1 1
2 $1 / 2$
3 1.5
4 $3 / 4$
Manipal UGET-2014
NEET DIGITAL LIBRARY
NUCLEAR PHYSICS

147633 The activity of a radioactive sample is measured as $N_{0}$ counts per minute at $t=0$ and $\mathrm{N}_{0} / \mathrm{e}$ counts per minute at $\mathrm{t}=5$ minutes. The time (in minutes) at which the activity reduces to half its value is

1 $\log _{e} 2 / 5$
2 $\frac{5}{\log _{\mathrm{e}} 2}$
3 $5 \log _{10} 2$
4 $5 \log _{\mathrm{e}} 2$
BITSAT-2017
NUCLEAR PHYSICS

147634 After two hours, one-sixteenth of the starting amount of a certain radioactive isotope remained undecayed. The half life of the isotope is

1 15 minutes
2 30 minutes
3 45 minutes
4 4 hours
BITSAT-2017
NUCLEAR PHYSICS

147636 The ratio of amounts of radioactive substances $X$ and $Y$ at any instant is 1:4. The half- life of substance $X$ is 18 hours and of $Y$ is 12 hours. After three days, the ratio of the amounts of the two substance will be

1 2:1
2 $1: 2$
3 $1: 1$
4 $4: 1$
CG PET- 2017
NUCLEAR PHYSICS

147638 Given a sample of radium-226 having half-life of 4 days. Find, the probability, a nucleus disintegrates after 2 half lives.

1 1
2 $1 / 2$
3 1.5
4 $3 / 4$
Manipal UGET-2014
Join With Us for More Updates