Download App

Alternating Current — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsAlternating Current1 Mark
MCQ
Choose the wrong statement of the following:
  • A
    The peak voltage across the inductor can be less than the peak voltage of the source in an LCR circuit
  • B
    In a circuit containing and a capacitor and an ac source the current is zero at the instant source voltage is maximum
  • C
    When an AC source is connected to a capacitor, then the rms current in the circuit gets increased if a dielectric slab is inserted into the capacitor
  • D
    In a pure inductive circuit emf will be in phase with the current
✓

Answer

  1. In a pure inductive circuit emf will be in phase with the current

Explanation:

In pure inductive circuit, 

voltage leads by $\frac{\pi}{2}$ 

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 [1M]" from Alternating Current→Alternating Current — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

If an electron and a proton have the same de-Broglie wavelength, the K.E of electrons is:
→
Dimensions of $\frac{1}{(\mu_0\in_0)}$ is:
→

The focal length of a lens of refractive index $\mu$ is f. If the lens is immersed in a liquid of refractive index $\mu$ then the focal length of lens is:

→
Consider three converging lenses L1, L2 and L3 having identical geometrical construction. The index of refraction of L1 and L2 are $\mu_1$ and $\mu_2$ respectively. The upper half of the lens L3 has a refractive index $\mu_1$ and the lower half has $\mu_2$. A point object O is imaged at O1 by the lens L1 and at O2 by the lens L2 placed in same position. If L3 is placed at the same place:

  1. There will be an image at O1
  2. There will be an image at O2
  3. The only image will form somewhere between O1 and O2
  4. The only image will form away from O2.

→

Which particles will have minimum frequency of revolution when projected with the same velocity perpendicular to a magnetic field

(a)  

(b) Electron

(c) Proton

(d)  
→
Einstein’s photoelectric equation states that hν = W + Ek. In this equatin, Ek refers to the?
→

Which of these is a fusion reaction

(a)  

(b) + 6 

(c)  

(d) None of these
→

A table tennis ball which has been covered with conducting paint is suspended by a silk thread so that it hang between two plates, out of which one is earthed and other is connected to a high voltage generator. This ball

(a) Is attracted towards high voltage plate and stays there

(b) Hangs without moving

(c) Swing backward and forward hitting each plate in turn

(d) Is attracted to earthed plate and stays there
→

A bulb of 100 watt is hanging at a height of one meter above the centre of a circular table of diameter 4 m. If the intensity at a point on its rim is , then the intensity at the centre of the table will be

(a)         

(b) 2 

(c) 2      

(d) 5 
→
The ratio of maximum and minimum intensities in an interference pattern is $25: 1$. The ratio of the intensities of the waves causing interference is-
→