Question
Electromotive force is the force, which is able to maintain a constant
|
(a) Current |
(b) Resistance |
(c) Power |
(d) Potential difference |
✓
Answer
(d) Potential difference
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Two important processes that occur during the formation of a p-n junction.
(1): The dielectric medium between the plates of a parallel plate capacitor lowers the potential difference between the plates without a battery.
(2): The maximum electric field that a dielectric can withstand without causing it to break down is dielectric strength.
(2): The maximum electric field that a dielectric can withstand without causing it to break down is dielectric strength.
The electrons of Rutherford’s model would be expected to lose energy because, they:
A hollow double concave lens is made of very thin transparent material. It can be filled with air or either of two liquids L1 and L2 having refractive indices n1 and n2 respectively (n2 > n1 > 1). The lens will diverge a parallel beam of light if it is filled with
|
(a) Air and placed in air |
(b) Air and immersed in L1 |
|
(c) L1 and immersed in L2 |
(d) L2 and immersed in L1 |
A capacitor 4 μF charged to 50 V is connected to another capacitor of 2 μF charged to 100 V with plates of like charges connected together. The total energy before and after connection in multiples of (
is
|
(a) 1.5 and 1.33 |
(b) 1.33 and 1.5 |
(c) 3.0 and 2.67 |
(d) 2.67 and 3.0 |
A charge q is moving in a magnetic field then the magnetic force does not depend upon
|
(a) Charge |
(b) Mass |
(c) Velocity |
(d) Magnetic field |
The molecules in which centres of positive and negative charges coincide are called as:
A thin semicircular conducting ring of radius R is falling with its plane vertical in a horizontal magnetic induction B. At the position MNQ, the speed of the ring is V and the potential difference developed across the ring is
|
(a) Zero |
|
(b) Bv |
|
(c) πRBV and Q is at higher potential |
|
(d) 2RBV and Q is at higher potential |
A pendulum clock that keeps correct time on the earth is taken to the moon. It will run:
→- At correct rate.
- 6 times faster.
-
$\sqrt{6}$ times faster.
-
$\sqrt{6}$ times slower.
Visible light passing through a circular hole forms a diffraction disc of radius 0.1mm on a screen. If an X-ray is passed through the same setup, the radius of the diffraction disc will be:
- zero
- < 0.1mm
- 0.1mm
- > 0.1m