- AVolt
- BVolt per metre
- CVolt metre
- DNone of these
Explanation:
E.m.f of a cell is defined as the maximum potential difference across the cell when no current flows through the circuit.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Boolean algebra is essentially based on
|
(a) Truth |
(b) Logic |
(c) Symbol |
(d) Numbers |
The distance between an object and the screen is 100 cm. A lens produces an image on the screen when placed at either of the positions 40 cm apart. The power of the lens is
|
(a) ≈ 3 dioptres |
(b) ≈ 5 dioptres |
(c) ≈ 7 diopters |
(d) ≈ 9 diopters |
A charge of 1C is moving in a magnetic field of 0.5Tesla with a velocity of 10m/sec Perpendicular to the field. Force experienced is
|
(a) 5 N |
(b) 10 N |
(b) 10 N |
(d) 0 N |
Assertion : A transistor is a voltage-operating device.
Reason : Base current is greater than the collector 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. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
Assertion : The focal length of the mirror is f and distance of the object from the focus is u, the magnification of the mirror is f / u.
Reason : Magnification =
|
(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. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |
A charge of 5 C is given a displacement of 0.5 m. The work done in the process is 10 J. The potential difference between the two points will be
|
(a) 2 V |
(b) 0.25 V |
(c) 1V |
(d) 25 V |
On passing 96500 coulomb of charge through a solution the amount of copper liberated is
|
(a) 64 gm |
(b) 32 gm |
(c) 32 kg |
(d) 64 kg |
Assertion : Two P-N junction diodes placed back to back, will work as a NPN transistor.
Reason : The P-region of two PN junction diodes back to back will form the base of NPN transistor.
|
(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. |
|
(c) If assertion is true but reason is false. |
|
(d) If the assertion and reason both are false. |