How Intrauterine Devices Work and Types

Q. Which of the following statement is incorrect regarding the IUDs (IntraUterine Devices)?

1. They are small pieces of plastic or metal that are inserted into the uterus.
2. They should be removed by a healthcare provider
3. IUDs offer a protection from sexually transmitted diseases.
4. IUDs prevent pregnancy by creating mild chronic inflammation.

Q. The length of a simple pendulum is $\frac{39.2}{{\pi }^2}\text{m}$. If $g=9.8{\text{m/s}}^2$, the time period of pendulum is

1. $2\text{s}$
2. $8\text{s}$
3. $4\text{s}$
4. $3\text{s}$

Q. Choose the correct option:

1. ICSI: Intra cytoplasmic sperm injection
2. IUT: Inter uterine transfer
3. ZIFT: Zygote inter fallopian transfer
4. GIFT: Gamete inter fallopian transfer

Q. Which of the following is a disadvantage of IUD?

1. Once IUD's are removed the female becomes fertile again
2. Not effective against sexually transmitted disease
3. Continuous protection provide for a long period
4. None of the above
   

Q.

The bob of a simple pendulum executes simple harmonic motion in water with a period $t$, while the period of oscillation of the bob is $t_0$ in air. Neglecting frictional force of water and given that the density of the bob is $\left(\frac{4}{3}\right)1000kg/m^3$. What relationship between $t$ and $t_0$ is true?

1. $t=t_0$
   

2. $t=4t_0$
   

3. $t=2t_0$

4. $t=\frac{t_0}{2}$

Q. What is the function of copper ions in copper releasing IUDs?

1. They inhibit gametogenesis
2. They aid in suppressing the sperm motility
3. They inhibit ovulation
4. All of these

Q.

IUDs which are used by females

1. act as spermicidal jellies

2. block the entry of sperms into vagina

3. are implanted under the skin and they release progestogen and oestrogen

4. release copper ions in the uterus that increase phagocytosis of sperms

Q. A simple pendulum of bob mass m is oscillating with an angular amplitude ${\alpha }_m$ (in radian). The maximum tension in the string is

1. $mg$
2. $mg{\alpha }_m$
3. $mg{\alpha }_m^2$
4. $mg(1+{\alpha }_m^2)$

Q. A simple pendulum is oscillating without damping. When the displacement of the bob is less than maximum, its acceleration vector $\overrightarrow{a}$ is correctly shown in (see figure.)

1. 
2. 
3. 
4. 

Q.

IUD can be inserted______

1. by oneself

2. by common practice

3. by a qualified medical practitioner

4. none of these