Equivalent Resistance of a System of Resistor

Q. What is the current $\left(I\right)$ in the circuit?

1. $1.5A$
2. $2.5A$
3. $3.5A$
4. $4.5A$

Q. Why the effective resistance is less than the resistance of each resistor in parallel combination?

Q.

3 Resistors one of them having a resistance of 12Ω when connected in parallel together across a battery of 44v draws a current of 22A these resistors when connected in series across the same battery draws a current of 2A. Find the resistance value of the other 2 resistors?

1. 8, 3 ohm’s

2. 6, 4 ohm’s

3. 12, 2 ohm’s

4. 5, 5 ohm’s

Q.

In the given set up resistors A, B & C are of resistance 1 ohm each.

Find the current through resistor A and Potential difference across it

1. 2A, 0v

2. 1A, 2v

3. 4A, 2v

4. 0A, 0v

Q. An electric bulb is designed to draw power $P_0$ at voltage $V_0$. If the voltage is V, it draws a power P, then-

1. $P=\left(\frac{V}{V_0}\right)P_0$
2. $P=\left(\frac{V_0}{V}\right)P_0$
3. $P={\left(\frac{V_0}{V}\right)}^2{P}_0$
4. $P={\left(\frac{V}{V_0}\right)}^2{P}_0$