- 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.
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If identical charges (-q) are placed at each corner of a cube of side b, then electric potential energy of charge (+q) which is placed at centre of the cube will be
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(a) |
(b) |
(c) |
(d) |
Consider the following statements A to B and identify the correct answer
A. Polarised light can be used to study the helical surface of nucleic acids.
B. Optics axis is a direction and not any particular line in the crystal
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(a) A and B are correct |
(b) A and B are wrong |
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(c) A is correct but B is wrong |
(d) A is wrong but B is correct |
The current sensitivity of a moving coil galvanometer can be increased by
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(a) Increasing the magnetic field of the permanent magnet |
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(b) Increasing the area of the deflecting coil |
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(c) Increasing the number of turns in the coil |
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(d) a, b, c |
The equivalent resistance between x and y in the circuit shown is
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(a) 10 W |
(b) 40 W |
(c) 20 W |
(d) |
In image formation from spherical mirrors, only paraxial rays are considered because they: