Inheritance of Human Skin Colour

Q. If power developed across $6\Omega$ is 24 J/sec, then total power devloped in circuit is

1. 48 W
2. 72 W
3. 144 W
4. 216 W

Q.
Given figure shows arrangement of six bulbs and two battries each bulb is rated at 100V and there power is shown in figure
List I gives bulbs and list II gives there output power

With switch $S_1$ closed and switch $S_2$ open

$\begin{array}{cc}\text{List~I}& \text{List~II}\\ \text{I)}{B}_1& \text{P)}\frac{256}{9}\\ \text{II)}{B}_2& \text{Q)}\frac{128}{9}\\ \text{III)}{B}_3& \text{R)}\frac{200}{9}\\ \text{IV)}{B}_4& \text{S)}\frac{512}{9}\\ & \text{T)}\frac{800}{9}\\ & \text{U)}\frac{400}{9}\end{array}$

1. I - R, II - U, III - T, IV - R
2. I - Q, II - S, III - U, IV - T
3. I - U, II - T, III - U, IV - R
4. I - R, II - U, III - T, IV - P

Q. A battery of internal resistance $4\Omega$ is connected to the network of resistances as shown in the figure. In order that the maximum power can be delivered to the network, the value of 𝑅 in $\Omega$ should be

1. $\frac{4}{9}$
2. $2$
3. $\frac{8}{3}$
4. $18$

Q. The wattage rating of a light bulb indicates the power dissipated by the bulb if it is connected across $110\text{V}$ DC potential difference. If a $50\text{W}$ and $100\text{W}$ bulb are connected in series to a $110\text{V}$ DC source, how much power will be dissipated in the $50\text{W}$ bulb?

1. $50\text{W}$
2. $100\text{W}$
3. $22\text{W}$
4. $11\text{W}$

Q. If power developed across $6\Omega$ is 24 J/sec, then total power devloped in circuit is

1. 48 W
2. 72 W
3. 144 W
4. 216 W

Q. If power developed across $6\Omega$ is 24 J/sec, then total power devloped in circuit is

1. 48 W
2. 72 W
3. 144 W
4. 216 W

Q. A cell of internal resistance $r$ is connected to a load of resistance $R$. Energy is dissipated in the load but some thermal energy is also wasted in the cell. The efficiency of such an arrangement is found from the expression

$\frac{\text{Energy dissipated in the load}}{\text{Energy dissipated in the complete circuit}}$

Which of the following gives the efficiency in this case?

1. $\frac{r}{R}$
2. $\frac{R}{r}$
3. $\frac{r}{R+r}$
4. $\frac{R}{R+r}$

Q. A cell of internal resistance $r$ is connected to a load of resistance $R$. Energy is dissipated in the load but some thermal energy is also wasted in the cell. The efficiency of such an arrangement is found from the expression

$\frac{\text{Energy dissipated in the load}}{\text{Energy dissipated in the complete circuit}}$

Which of the following gives the efficiency in this case?

1. $\frac{r}{R}$
2. $\frac{R}{r}$
3. $\frac{r}{R+r}$
4. $\frac{R}{R+r}$

Q. A battery of internal resistance $4\Omega$ is connected to the network of resistances as shown in the figure. In order that the maximum power can be delivered to the network, the value of 𝑅 in $\Omega$ should be

1. $\frac{4}{9}$
2. $2$
3. $\frac{8}{3}$
4. $18$