The p.d. across a $3 \Omega$ resistor is $6 \mathrm{~V}$. The current flowing in the resistor will be:(a) $\frac{1}{2} \mathrm{~A}$(b) $1 \mathrm{~A}$(c) $2 \mathrm{~A}$(d) $6 \mathrm{~A}$
Given:
Potential difference, V=6V
Resistance, R=3 ohms
To find:
Current, I
Solution:
According to the ohm's law:
$\mathrm{I}=\frac{\mathrm{V}}{\mathrm{R}}$
$\mathrm{I}=\frac{\mathrm{6}}{\mathrm{3}}$
= 2 A
Answer is option (c)
Related Articles
- A current of $200 \mathrm{~mA}$ flows through a $4 \mathrm{k} \Omega$ resistor. What is the p.d. across the resistor?
- If \( \sin \mathrm{A}+\sin ^{2} \mathrm{~A}=1 \), then the value of the expression \( \left(\cos ^{2} \mathrm{~A}+\cos ^{4} \mathrm{~A}\right) \) is(A) 1(B) \( \frac{1}{2} \)(C) 2(D) 3
- Prove the following:\( \frac{\tan \mathrm{A}}{1+\sec \mathrm{A}}-\frac{\tan \mathrm{A}}{1-\sec \mathrm{A}}=2 \operatorname{cosec} \mathrm{A} \)
- If \( \triangle \mathrm{ABC} \) is right angled at \( \mathrm{C} \), then the value of \( \cos (\mathrm{A}+\mathrm{B}) \) is(A) 0(B) 1(C) \( \frac{1}{2} \)(D) \( \frac{\sqrt{3}}{2} \)
- If the point \( P(2,1) \) lies on the line segment joining points \( A(4,2) \) and \( B(8,4) \), then(A) \( \mathrm{AP}=\frac{1}{3} \mathrm{AB} \)(B) \( \mathrm{AP}=\mathrm{PB} \)(C) \( \mathrm{PB}=\frac{1}{3} \mathrm{AB} \)(D) \( \mathrm{AP}=\frac{1}{2} \mathrm{AB} \)
- Bisectors of angles \( \mathrm{A}, \mathrm{B} \) and \( \mathrm{C} \) of a triangle \( \mathrm{ABC} \) intersect its circumcircle at \( \mathrm{D}, \mathrm{E} \) and Frespectively. Prove that the angles of the triangle \( \mathrm{DEF} \) are \( 90^{\circ}-\frac{1}{2} \mathrm{~A}, 90^{\circ}-\frac{1}{2} \mathrm{~B} \) and \( 90^{\circ}-\frac{1}{2} \mathrm{C} \).
- Identify the like termsa) \( -a b^{2},-4 b a^{2}, 8 a^{2}, 2 a b^{2}, 7 b,-11 a^{2},-200 a,-11 a b, 30 a^{2} \)\( \mathrm{b},-6 \mathrm{a}^{2}, \mathrm{b}, 2 \mathrm{ab}, 3 \mathrm{a} \)
- If \( \sin \mathrm{A}=\frac{1}{2} \), then the value of \( \cot \mathrm{A} \) is(A) \( \sqrt{3} \)(B) \( \frac{1}{\sqrt{3}} \)(C) \( \frac{\sqrt{3}}{2} \)(D) 1
- An electrical appliance has a resistance of $25 \Omega$. When this electrical appliance is connected to a $230 \mathrm{~V}$ supply line, the current passing through it will be:(a) $0.92 \mathrm{~A}$(b) $2.9 \mathrm{~A}$(c) $9.2 \mathrm{~A}$(d) $92 \mathrm{~A}$
- In a parallelogram \( \mathrm{ABCD}, \angle \mathrm{A}: \angle \mathrm{B}=2: 3, \) then find angle \( \mathrm{D} \).
- Choose the correct answer from the given four options:If in triangles \( \mathrm{ABC} \) and \( \mathrm{DEF}, \frac{\mathrm{AB}}{\mathrm{DE}}=\frac{\mathrm{BC}}{\mathrm{FD}} \), then they will be similar, when(A) \( \angle \mathrm{B}=\angle \mathrm{E} \)(B) \( \angle \mathrm{A}=\angle \mathrm{D} \)(C) \( \angle \mathrm{B}=\angle \mathrm{D} \)(D) \( \angle \mathrm{A}=\angle \mathrm{F} \)
- A car headlight bulb working on a $12 \mathrm{~V}$ car battery draws a current of $0.5 \mathrm{~A}$. The resistance of the light bulb is :(a) $0.5 \Omega$(b) $6 \Omega$(c) $12 \Omega$(d) $24 \Omega$
- \( \mathrm{a}^{2}-\mathrm{b}^{2} \) is a product of ____ and ____.
Kickstart Your Career
Get certified by completing the course
Get Started
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies