Download App

Magnetic Effect of Current — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsMagnetic Effect of Current1 Mark
MCQ
Two straight horizontal parallel wires are carrying the same current in the same direction, d is the distance between the wires. You are provided with a small freely suspended magnetic needle. At which of the following positions will the orientation of the needle be independent of the magnitude of the current in the wires
  • A
    At a distance d/2 from any of the wires
  • B
    At a distance d/2 from any of the wires in the horizontal plane
  • C
    Anywhere on the circumference of a vertical circle of radius d and centre halfway between the wires
  • ✓
    At points halfway between the wires in the horizontal plane
✓

Answer

Correct option: D.
At points halfway between the wires in the horizontal plane
 At points halfway between the wires in the horizontal plane

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 (1 Marks)" from Magnetic Effect of Current→Magnetic Effect of Current — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Assertion : Diamond glitters brilliantly.
Reason : Diamond does not absorb sunlight.
→
The circular wire in figure below encircles solenoid in which the magnetic flux is increasing at a constant rate out of the plane of the page. The clockwise emf around the circular loop is $\varepsilon_{0}$. By definition a voltammeter measures the voltage difference between the two points given by $V_{b}-V_{a}=-\int \limits_{a}^{b} E \cdot d s$ We assume that $a$ and $b$ are infinitesimally close to each other. The values of $V_{b}-V_{a}$ along the path $1$ and $V_{a}-V_{b}$ along the path $2$ , respectively are
→
Water boils in an electric kettle in $15\,\min$ after switching on. If the length of the heating wire is decreased to $2/3$ of its initial value, then the same amount of water will boil with the same supply voltage in ............. $min$
→
Given below are two statements:

Statement $(I)$: When an object is placed at the centre of curvature of a concave lens, image is formed at the centre of curvature of the lens on the other side.

Statement $(II)$: Concave lens always forms a virtual and erect image.

In the light of the above statements, choose the correct answer from the options given below:

→
A sphere is rotating about a diameter:
→
When $100\, V\, DC$ is applied across a solenoid a current of $1\, A$ flows in it. When $100\, V\, AC$ is applied across the same coil, the current drops to $0.5\, A$. If the frequency of the $AC$ source is $50\,Hz$, the impedance and inductance of the solenoid are:
→
In the circuit shown in figure, the $5\,\Omega $ resistance develops $20.00\,cal/s$ due to the current flowing through it. The heat developed in $2\,\Omega $ resistance (in $cal/s$ ) is
→
Cells are joined in parallel. The internal resistance of the cell is:
→
Match the column
$(A)$ Hallwachs $\&$ Lenard  $(P)$ Transformers
$(B)$ Franck-Hertz $(Q)$ Microwave
$(C)$ Klystron valve  $(R)$ Quantization of energy levels
$(D)$ Nicola Tesla $(S)$ Photoelectric effect
→
Laser beams are used to measure long distance because
→