Download App

Magnetism — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsMagnetism1 Mark
MCQ
Assertion : Reduction factor (K) of a tangent galvanometer helps in reducing deflection to current.
Reason : Reduction factor increases with increase of current.
  • A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
  • B
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
  • ✓
    If assertion is true but reason is false.
  • D
    If the assertion and reason both are false.
✓

Answer

Correct option: C.
If assertion is true but reason is false.
 If assertion is true but reason is false.

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 Magnetism→Magnetism — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Two square wire frames $abcd$ and $efgh$ are placed in uniformly decreasing magnetic field as shown in figure. The direction of induced current in both the loops is
→
An object is placed at a distance m times the focal length of a divergent lens. The size of the image is shorter than that of the object by
→
According to the diagram, the equipotential points are $......$. The arrows are the direction of the electric field.
Image
→
The potential difference applied to an $X-$ ray tube is increased. As a result, in the emitted radiation
→
Figure shows a circuit in which three identical diodes are used . Each diode has forward resistance of $20\,\Omega $ and infinite backward resistance. Resistors $R_1 = R_2 = R_3 = 50\,\Omega.$ Battery voltage is $6\,V.$ The current through $R_3$ is.....$mA$
→
Statement$-I :$ To get a steady de output from the pulsating voltage received from a full wave rectifier we can connect a capacitor across the output parallel to the load ${R}_{{L}}$

Statement$-II :$ To get a steady de output from the pulsating voltage received from a full wave rectifier we can connect an inductor in series with ${R}_{{L}}$.

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

→
A current of 2.0 ampere passes through a cell of e.m.f. 1.5 volts having internal resistance of 0.15 ohm. The potential difference measured, in volts, across both the ends of the cell will be
→
A uniform magnetic field $B$ and a uniform electric field $E$ act in a common region. An electron is entering this region of space. The correct arrangement for it to escape undeviated is
→
Figure shown a $DC$ voltage regulator circuit, with a Zener diode of breakdown voltage $= 6\,V$. If the unregulated input voltage varies between $10\, V$ to $16\, V$, then what is the maximum Zener current ?.......$mA$
→
An object is initially at a distance of $100 \;cm$ from a plane mirror. If the mirror approaches the object at a speed of $10\; cm/sec$, then after $6\; sec$ the distance between the object and its image will be
→