- A1 ohm
- ✓2 ohm
- C0.15 ohm
- D10 ohm
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$\text{v}=\frac{\text{v}_1+\text{v}_2}{2}$
$\text{v}=\sqrt{\text{v}_1\text{v}_2}$
$\frac{2}{\text{v}}=\frac{1}{\text{v}_1}+\frac{1}{\text{v}_2}$
$\frac{1}{\text{v}}=\frac{1}{\text{v}_1}+\frac{1}{\text{v}_2}$
Find the equivalent resistance across AB
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(a) 1 W |
(b) 2 W |
(c) 3 W |
(d) 4 W |
A helium nucleus makes a full rotation in a circle of radius 0.8 metre in two seconds. The value of the magnetic field B at the centre of the circle will be
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(a) |
(b) |
(c) 2 |
(d) |
Which of the following statement is true
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(a) |
(b) |
|
(c) |
(d) |
The wrong statement about electric lines of force is
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(a) These originate from positive charge and end on negative charge |
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(b) They do not intersect each other at a point |
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(c) They have the same form for a point charge and a sphere |
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(d) They have physical existence |
Two short magnets of equal dipole moments M are fastened perpendicularly at their centre (figure). The magnitude of the magnetic field at a distance d from the centre on the bisector of the right angle is
|
(a) |
(b) |
(c) |
(d) |