50 Omega and 100 Omega resistors are connec | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Let the resistors be $R_1 = 50 \ \Omega$ and $R_2 = 100 \ \Omega$. The voltmeter has a resistance $R_v = 100 \ \Omega$.When the voltmeter is conne

Vedclass · Accepted Answer

$1.2$

Vedclass · Answer

(C) Let the resistors be $R_1 = 50 \ \Omega$ and $R_2 = 100 \ \Omega$. The voltmeter has a resistance $R_v = 100 \ \Omega$.When the voltmeter is connected in parallel with $R_2$,the equivalent resistance of this parallel combination $R_p$ is given by:$R_p = \frac{R_2 	imes R_v}{R_2 + R_v} = \frac{100 	imes 100}{100 + 100} = \frac{10000}{200} = 50 \ \Omega$.The total resistance of the circuit is $R_{eq} = R_1 + R_p = 50 \ \Omega + 50 \ \Omega = 100 \ \Omega$.The total current $I$ flowing from the battery is $I = \frac{V}{R_{eq}} = \frac{2.4 \ V}{100 \ \Omega} = 0.024 \ A$.The voltmeter reading is the potential difference across the parallel combination $R_p$:$V_{reading} = I 	imes R_p = 0.024 \ A 	imes 50 \ \Omega = 1.2 \ V$.

$50 \ \Omega$ and $100 \ \Omega$ resistors are connected in series. This connection is connected with a battery of $2.4 \ V$. When a voltmeter of $100 \ \Omega$ resistance is connected across the $100 \ \Omega$ resistor,the reading of the voltmeter will be $.......... \ V$.

Similar Questions

Selection is a method related to which of the following?

The magnetic induction and the intensity of the magnetic field inside an iron core of an electromagnet are $1 \ Wb \ m^{-2}$ and $150 \ A \ m^{-1}$,respectively. The relative permeability of iron is $\left(\mu_0 = 4 \pi \times 10^{-7} \ H \ m^{-1}\right)$.

The time in seconds required to produce a potential difference of $20 \ V$ across a capacitor of $1000 \ \mu F$ when it is charged at a steady rate of $200 \ \mu C/s$ is:

Which of the following has the lowest melting point?

If in a regular polygon,the number of diagonals is $54$,then the number of sides of the polygon is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module