- AVoltage Difference
- BCurrent
- CTemperature difference
- DChemical Imbalance
Explanation:
When a potential difference is applied across a resistor then randomly moving free electrons start to move towards positive terminal due to force applied by electric field generated due to voltage difference. thus a start to Current Flows from High Voltage to Low Voltage.
Voltage is cause and current is effect.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
In hydrogen atom, when electron jumps from second to first orbit, then energy emitted is
|
(a) – 13.6 eV |
(b) – 27.2 eV |
(c) – 6.8 eV |
(d) None of these |
Mark the correct options:
The resistance of a conductor varies with temperature t as shown in the figure. If the variation is represented by
=
, then
|
(a) α and β are both negative |
(b) α and β are both positive |
|
(c) α is positive and β is negative |
(d) α is negative and β are positive |
In the following atoms and moleculates for the transition from n = 2 to n = 1, the spectral line of minimum wavelength will be produced by
|
(a) Hydrogen atom |
(b) Deuterium atom |
(c) Uni-ionized helium |
(d) di-ionized lithium |
The equivalent resistance of the circuit shown in the figure is
|
(a) 8 W |
(b) 6 W |
(c) 5 W |
(d) 4 W |
Six charges, three positive and three negative of equal magnitude are to be placed at the vertices of a regular hexagon such that the electric field at O is double the electric field when only one positive charge of same magnitude is placed at R. Which of the following arrangements of charges is possible for P, Q, R, S, T and U respectively

|
(a) +, -, +, -, -, + |
(b) +, -, +, -, +, - |
(c) +, +, -, +, -, - |
(d) -, +, +, -, +, - |
In the circuit given below, the value of the current is
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| (a) 0 amp |
(b) |
(c) |
(d) |