Download App

Current Electricity — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsCurrent Electricity1 Mark
MCQ
Emf of a cell is:
  • A
    The maximum potential difference between the terminals of a cell when no current is drawn from the cell.
  • B
    The force required to push the electrons in the circuit.
  • C
    The potential difference between the positive and negative terminal of a cell in a closed circuit.
  • D
    Less than terminal potential difference of the cell.
✓

Answer

  1. The maximum potential difference between the terminals of a cell when no current is drawn from the cell.

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 Current Electricity→Current Electricity — all question types→Physics STD 12 Science question papers→Bihar Board STD 12 Science question papers→Bihar Board question paper generator→

Similar questions

$m ^2 V^{-1} s^{-1}$ is the SI unit of which of the following?
→

A presbyopic patient has near point as 30 cm and far point as 40 cm. The dioptric power for the corrective lens for seeing distant objects is

(a) 40 D   

(b)  4 D  

(c)   – 2.5 D

(d)  0.25 D  
→
An $\alpha$-particle captures an electron. What does it change to?
→
The magnetic field produced at the centre of current carrying circular coil is :
→
In the circuit shown in Fig. initially key K1 is closed and key K2 is open. Then K1 is opened and K2 is closed (order is important). [Take Q1' and Q2' as charges on C1 and C2 and V1 and V2 as voltage respectively.]

 

Then

→

Two wires have resistance of 2W and 4W connected to same voltage, ratio of heat dissipated at resistance is

(a) 1 : 2

(b) 4 : 3

(c) 2 : 1

(d) 5 : 2
→
During the 19th century, light was considered to be a stream of particles called:
→

The angle of dip at the magnetic equator is

(a) 0°

 (b) 45°

 (c) 30°

 (d) 90°
→

If an electron oscillates at a frequency of 1 GHz it gives

(a) X-rays

(b) Mirowaves

(c) Infrared rays

(d) None of these
→
There is some liquid in a closed bottle. The amount of liquid is continuously decreasing. The vapour in the remaining part:
  1. Must be saturated.
  2. Must be unsaturated.
  3. May be saturated.
  4. There will be no vapour.
→