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WorksheetsOhms Law
Total questions: 35
Worksheet time: 19mins
In the Ohm’s Law, Current (I) is ___________ proportional to the Resistance (R).
Directly
Indirectly
In the Ohm’s Law, Current (I) is ___________ proportional to the Voltage (V).
Directly
Indirectly
Ohm’s law formula is __________________.
I = V/R
V = IR
R = V/I
All are correct
When 500 Voltage (V) applied to the 2KΩ Resistance (R) then what will be Current (I) according to the Ohm’s Law.
0.50 Amp
0.25 Amp
0.75 Amp
4 Amp
What is the Resistance (R) _____________ of a bulb when draws 0.25A from a 24V battery Source?
75Ω
96Ω
85Ω
88Ω
The Unit of Current (I) is _______________.
Ohm
Ampere
Volt
Siemen
The Unit of Resistance (R) is _______________.
Ohm
Ampere
Volt
Siemen
A graph of Current (I) versus Resistance (R) with Voltage (V) constant is called a ____________.
Ordinate
Hyperbola
Abscissa
All are correct
The electric shock of 0.1 to 0.2 Amp can cause the _______________.
Mild sensation
Threshold of sensation
Death
Painful
The resistance in the open circuit is _________________
Infinitely low
Infinitely High
Zero
a & b are correct
Infinitely low
Infinitely High
Zero
a & b are correct
An open circuit has zero current.
TRUE
FALSE
The resistance in the short circuit is _________________
Infinitely low
Infinitely High
Zero
a & b are correct
A short circuit has excessive current.
TRUE
FALSE
If doubling the voltage across a resistor doubles the current through the resistor then
the resistor value decreased
the resistor value did not change
the resistor value increased
it is impossible to determine the change in the resistor value
If the voltage across a fixed value of resistance is increased five times, what does the current do?
It increases by a factor of five.
It decreases by a factor of five
.It stays the same.
Not enough information
If the resistance in a circuit with constant voltage increases, the current will
increase
decrease
stay the same
Not enough information
A damaged resistor
may appear burned
may have an increased resistance value
may be checked with an ohmmeter
All of the above
Power supplies differ from batteries in that
power supply output voltages are ac and not dc
power supply voltages are not stable
power supplies are low-current devices
None of the above
If voltage across a resistance doubles
the current is halveds
the resistance doubles
the current is unchanged
.none of the above
Ohm's law describes the mathematical relationship between
ohms, kilohms, and megohms
resistor size and resistor value
resistance, voltage, and current
none of the above
What electromotive force would cause 20 A of current to flow through a 500 resistor?
0.04 V
2.5 V
25.0 V
10,000 V
If current through a resistance is halved
the resistance is halved
the voltage is halved
the voltage doubles
none of the above
Ohm's law is applicable to
Semiconductors
Vacuum tubes
Carbon resistors
None of these
Ohm's law is not applicable to
DC circuits
high currents
small resistors
semi-conductors.
A resistance of 5 ohms is further drawn so that its length becomes double. Its resistance will now be
5 ohms
7.5 ohms
10 ohms
20 ohms.
Ohm's law is not applicable in all the following cases Except
Electrolytes
Arc lamps
Insulators
Vacuum ratio values.
Ohm's law is applicable to all conductors of electricity.
TRUE
FALSE
Electrons in a conductor have no motion in the absence of a potential difference across it.
TRUE
FALSE
According to Ohm’s Law
V is directly proportional to I
V is inversely proportional to I
V is directly proportional to √I
All o the above
The statement which correctly represents Ohm’s law:
V = IR
V = R/I
R = VI
I = R/V
A 10 ohms resistor is powered by a 5-V battery. The current flowing through the source is:
10 A
50 A
2 A
0.5 A
Ohm is denoted by the symbol
π
Ω
θ
λ
The property of a substance which offers opposition to the flow of current through it is called
energy
capacity
resistance
voltage
An electric lamp draws 2 A current when connected to a 120 V source. What is the resistance of source:
2 Ω
60 Ω
120 Ω
240 Ω
The relationship between current, resistance and voltage is determined by _______________.
Georg Simon Ohm (1826 AD)
William Shockley (1836 AD)
John Bardeen (1816 AD)
Hans Christian (1846 AD)
