Download App

Electricity — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceElectricity1 Mark
MCQ
The p.d. across a $ 3Ω$ resistor is 6V. The current flowing in the resistor will be:
  • A
    $\frac{1}{2}\text{A}$
  • B
    1A.
  • C
    2A.
  • D
    6A.
✓

Answer

  1. 2A.

Explanation:

If the p.d. across a $3\Omega$ resistor is 6V, the current flowing in the resistor will be 2A as current (I) is given by the equation, $\text{I}=\frac{\text{V} (\text{Voltage})}{\text{R}(\text{Resistance})}.$

or $\text{I}=\frac{\text{V}}{\text{R}}$

$\text{I}=6\ \frac{\text{V}}{3}\ Ω$

$\text{I} = 2\text{A.}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q-[Phy-1M]" from Electricity→Electricity — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

The SI unit of magnetic field intensity is:
→
An induced current is produced when a magnet is moved into a coil. The magnitude of induced current does not depend on:
  1. The speed with which the magnet is moved.
  2. The number of turns of the coil.
  3. The resistivity of the wire of the coil.
  4. The strength of the magnet.
→
A student obtained a sharp image of a candle flame placed at the distant end of the laboratory table on a screen using a concave mirror to determine its focal length. The teacher suggested him to focus a distant building about 1 km far from the laboratory, for getting more correct value of the focal length. In order to focus the distant building on the same screen the student should slightly move the:
→
The angle of reflection is equal to the angle of incidence:
  1. Always.
  2. Sometimes.
  3. Under special conditions.
  4. Never.
→
The work done in moving a unit charge across two points in an electric circuit is a measure of:
  1. Current.
  2. Potential difference.
  3. Resistance.
  4. Power.
→
Having two eyes gives a person:
  1. Deeper field of view.
  2. Coloured field of view.
  3. Rear field of view.
  4. Wider field of view.
→
Which statement is wrong from the following?
→
The shape of the earth's magnetic field resembles that of an imaginary:
→
Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
→
The image formed by a concave mirror is virtual, erect and magnified. The position of object is:
→