- AKirchhoff’s Law
- BNewton’s Law
- CCoulomb’s Law
- DStephan’s Law
Explanation:
Kirchhoff’s Law is used to analyze circuits. This law is important because they represent connections of a circuit. Kirchhoff’s Law provide the constraints that let us find the current flowing and voltage across every circuit element.
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If for a thermocouple is the neutral temperature,
is the temperature of the cold junction and
is the temperature of inversion, then
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(a) |
(b) |
(c) |
(d) None of these |
Assertion : At a point in space, the electric field points towards north. In the region, surrounding this point the rate of change of potential will be zero along the east and west.
Reason : Electric field due to a charge is the space around the charge.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
The following diagram indicates the energy levels of a certain atom when the system moves from 2E level to E, a photon of wavelength λ is emitted. The wavelength of photon produced during its transition from
level to E is

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(a) λ/3 |
(b) 3 λ/4 |
(c) 4 λ/3 |
(d) 3 λ |
$\text{k}$
$\omega$
$\frac{\text{k}}{\omega}$
$\text{k}\omega$
The half life period of a radioactive element X is same as the mean life time of another radioactive element Y. Initially both of them have the same number of atoms. Then
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(a) X and Y have the same decay rate initially |
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(b) X and Y decay at the same rate always |
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(c) Y will decay at a faster rate than X |
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(d) X will decay at a faster rate than Y |
(1) The product of a volt and a coulomb is a joule.
(2) The product of a volt and an ampere is a joule/second.
(3) The product of volt and watt is horse power.
(4) Watt-hour can be measured in terms of electron volt.
State if
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(a) All four are correct |
(b) (1), (2) and (4) are correct |
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(c) (1) and (3) are correct |
(d) (3) and (4) are correct |
Banding of a stick when placed in water is because:
When a resistor of 11 W is connected in series with an electric cell, the current flowing in it is 0.5 A. Instead, when a resistor of 5 W is connected to the same electric cell in series, the current increases by 0.4 A. The internal resistance of the cell is
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(a) 1.5 W |
(b) 2 W |
(c) 2.5 W |
(d) 3.5 W |
Fraunhofer lines of the solar system is an example of
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(a) Emission spectrum |
(b) Emission band spectrum |
|
(c) Continuous emission spectrum |
(d) Line absorption spectrum |