Current Electricity
Quiz by Indira Menon
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- Q1
What is the order of magnitude of the resistance of a dry human body?
104 Ω
10 Ω
10 μΩ
10 MΩ
60s - Q2
A silver wire has a resistance of 2.1 Ω at 27.5 °C, and a resistance of 2.7 Ω at 100 °C. What is the temperature coefficient of resistivity of silver?
0.0039
0.0059
0.0129
0.0159
60s - Q3
The rate of flow of electric charge through any cross-section of a conductor is known as ___________.
Electric current
Electric potential
Electric field
Electric flux
60s - Q4
Mobility is denoted by
μ
α
ρ
η
60s - Q5
Which of the following is non-ohmic resistance?
Copper wire
Diode
Carbon resistor
Lamp filament
60s - Q6
Unit of conductance is ___________________.
Dyne
Volts
Siemen
Ohm
60s - Q7
Current density is a _____________.
scalar quantity
none of these options
vector quantity
dimensionless quantity
60s - Q8
The resistivity of certain metals or alloys drops to zero when they are cooled below a certain temperature, this phenomenon is known as ______________.
Super Conductivity
Partial conductivity
Conductivity
Non-conductivity
60s - Q9
State true or false. The total resistance in the series combination is more than the greatest resistance in the circuit.
truefalseTrue or False60s - Q10
The opposition offered by the electrolyte of the cell to the flow of current through itself is known as _____________.
Internal resistance
None of these options
External resistance
Non-resistance
60s - Q11
An electric heater is connected to the voltage supply. After few seconds, current gets its steady value then its initial current will be
slightly higher than its steady current
equal to its steady current
zero
slightly less than its steady current
60s - Q12
In the series combination of two or more than two resistances
the current through each resistance us same.
both current and voltage through each resistance are same.
neither current nor voltage through each resistance is same.
the voltage through each resistance is same.
60s - Q13
Combine three resistors 5 Q, 4.5 Q and 3 Q in such a way that the total resistance of this combination is maximum
14.5 Q
12.5 Q
13.5 Q
16.5 Q
60s - Q14
A cell having an emf E and internal resistance r is connected across a variable external resistance R. As the resistance R is increased, the plot of potential difference V across R is given by
d
b
a
c
60s - Q15
In parallel combination of n cells, we obtain
more current
less current
more voltage
less voltage
60s
