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Siemen is the SI unit of
NET
NUST Entry Test
Physics
Current Electricity
Three resistors connected in series have individual voltages labeled $\rm{V_{1}}$, $\rm{V_{2}}$ and \rm{V_{3}} respectively. Which of the following expresses the value of the total voltage $\rm{V_{T}}$ taken over the three resistors together?
NET
NUST Entry Test
Physics
Current Electricity
The power dissipated in a resistor is 12.8 watts when 4 A current is passed. How much power will be dissipated if 6 A current is passed through the same resistor?
NET
NUST Entry Test
Physics
Current Electricity
If voltage is 100 V, current Is 10A and R is 5 ohm then Internal resistance will be?
NET
NUST Entry Test
Physics
Current Electricity
Three resistors R1, R2 and R3 are connected in series. If R1 > R2 > R3, the equivalent resistance will be
NET
NUST Entry Test
Physics
Current Electricity
Which of the following convert the heat energy into electrical energy
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NUST Entry Test
Physics
Current Electricity
Three resistors of 5 ohm, 7 ohm and 8 ohm are connected in series. Current flow will be maximum through which resistor
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NUST Entry Test
Physics
Current Electricity
mho is the unit of?
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NUST Entry Test
Physics
Current Electricity
In which of the following more heat energy is produced?
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NUST Entry Test
Physics
Current Electricity
Value of resistivity of Iron Is
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NUST Entry Test
Physics
Current Electricity
If a magnetic field around a current carrying wire is anti-clockwise then the direction of current flow is
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NUST Entry Test
Physics
Current Electricity
$\rm{\frac{Volt}{ohm}}=?$
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NUST Entry Test
Physics
Current Electricity
Unit of emf?
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NUST Entry Test
Physics
Current Electricity
Most electric wires are made of copper because copper is:
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NUST Entry Test
Physics
Current Electricity
The best conductor is:
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NUST Entry Test
Physics
Current Electricity
The current in a light bulb rises to a maximum almost at the instant the bulb is turned on the current then decreases. This is because:
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NUST Entry Test
Physics
Current Electricity
A sample of a conductor is said to obey Ohm's law if graph between V and I is:
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NUST Entry Test
Physics
Current Electricity
Mathematical form of Ohm's law is:
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NUST Entry Test
Physics
Current Electricity
The unit of resistance is:
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NUST Entry Test
Physics
Current Electricity
The resistance of a conductor depends upon:
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NUST Entry Test
Physics
Current Electricity
If the resistance of the conductor is increased, then current will:
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NUST Entry Test
Physics
Current Electricity
The practical unit of current is:
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NUST Entry Test
Physics
Current Electricity
During electrolysis process (using $CuSO_{4}$) density of $CuSO_{4}$ solution:
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NUST Entry Test
Physics
Current Electricity
Copper sulphate is dissociated into $Cu^{++}$ and $SO_{4}^{--}$ ions when it is:
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NUST Entry Test
Physics
Current Electricity
The current through a wire is defined as:
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NUST Entry Test
Physics
Current Electricity
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